License cleanup: add SPDX GPL-2.0 license identifier to files with no license
Many source files in the tree are missing licensing information, which
makes it harder for compliance tools to determine the correct license.
By default all files without license information are under the default
license of the kernel, which is GPL version 2.
Update the files which contain no license information with the 'GPL-2.0'
SPDX license identifier. The SPDX identifier is a legally binding
shorthand, which can be used instead of the full boiler plate text.
This patch is based on work done by Thomas Gleixner and Kate Stewart and
Philippe Ombredanne.
How this work was done:
Patches were generated and checked against linux-4.14-rc6 for a subset of
the use cases:
- file had no licensing information it it.
- file was a */uapi/* one with no licensing information in it,
- file was a */uapi/* one with existing licensing information,
Further patches will be generated in subsequent months to fix up cases
where non-standard license headers were used, and references to license
had to be inferred by heuristics based on keywords.
The analysis to determine which SPDX License Identifier to be applied to
a file was done in a spreadsheet of side by side results from of the
output of two independent scanners (ScanCode & Windriver) producing SPDX
tag:value files created by Philippe Ombredanne. Philippe prepared the
base worksheet, and did an initial spot review of a few 1000 files.
The 4.13 kernel was the starting point of the analysis with 60,537 files
assessed. Kate Stewart did a file by file comparison of the scanner
results in the spreadsheet to determine which SPDX license identifier(s)
to be applied to the file. She confirmed any determination that was not
immediately clear with lawyers working with the Linux Foundation.
Criteria used to select files for SPDX license identifier tagging was:
- Files considered eligible had to be source code files.
- Make and config files were included as candidates if they contained >5
lines of source
- File already had some variant of a license header in it (even if <5
lines).
All documentation files were explicitly excluded.
The following heuristics were used to determine which SPDX license
identifiers to apply.
- when both scanners couldn't find any license traces, file was
considered to have no license information in it, and the top level
COPYING file license applied.
For non */uapi/* files that summary was:
SPDX license identifier # files
---------------------------------------------------|-------
GPL-2.0 11139
and resulted in the first patch in this series.
If that file was a */uapi/* path one, it was "GPL-2.0 WITH
Linux-syscall-note" otherwise it was "GPL-2.0". Results of that was:
SPDX license identifier # files
---------------------------------------------------|-------
GPL-2.0 WITH Linux-syscall-note 930
and resulted in the second patch in this series.
- if a file had some form of licensing information in it, and was one
of the */uapi/* ones, it was denoted with the Linux-syscall-note if
any GPL family license was found in the file or had no licensing in
it (per prior point). Results summary:
SPDX license identifier # files
---------------------------------------------------|------
GPL-2.0 WITH Linux-syscall-note 270
GPL-2.0+ WITH Linux-syscall-note 169
((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) 21
((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) 17
LGPL-2.1+ WITH Linux-syscall-note 15
GPL-1.0+ WITH Linux-syscall-note 14
((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) 5
LGPL-2.0+ WITH Linux-syscall-note 4
LGPL-2.1 WITH Linux-syscall-note 3
((GPL-2.0 WITH Linux-syscall-note) OR MIT) 3
((GPL-2.0 WITH Linux-syscall-note) AND MIT) 1
and that resulted in the third patch in this series.
- when the two scanners agreed on the detected license(s), that became
the concluded license(s).
- when there was disagreement between the two scanners (one detected a
license but the other didn't, or they both detected different
licenses) a manual inspection of the file occurred.
- In most cases a manual inspection of the information in the file
resulted in a clear resolution of the license that should apply (and
which scanner probably needed to revisit its heuristics).
- When it was not immediately clear, the license identifier was
confirmed with lawyers working with the Linux Foundation.
- If there was any question as to the appropriate license identifier,
the file was flagged for further research and to be revisited later
in time.
In total, over 70 hours of logged manual review was done on the
spreadsheet to determine the SPDX license identifiers to apply to the
source files by Kate, Philippe, Thomas and, in some cases, confirmation
by lawyers working with the Linux Foundation.
Kate also obtained a third independent scan of the 4.13 code base from
FOSSology, and compared selected files where the other two scanners
disagreed against that SPDX file, to see if there was new insights. The
Windriver scanner is based on an older version of FOSSology in part, so
they are related.
Thomas did random spot checks in about 500 files from the spreadsheets
for the uapi headers and agreed with SPDX license identifier in the
files he inspected. For the non-uapi files Thomas did random spot checks
in about 15000 files.
In initial set of patches against 4.14-rc6, 3 files were found to have
copy/paste license identifier errors, and have been fixed to reflect the
correct identifier.
Additionally Philippe spent 10 hours this week doing a detailed manual
inspection and review of the 12,461 patched files from the initial patch
version early this week with:
- a full scancode scan run, collecting the matched texts, detected
license ids and scores
- reviewing anything where there was a license detected (about 500+
files) to ensure that the applied SPDX license was correct
- reviewing anything where there was no detection but the patch license
was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied
SPDX license was correct
This produced a worksheet with 20 files needing minor correction. This
worksheet was then exported into 3 different .csv files for the
different types of files to be modified.
These .csv files were then reviewed by Greg. Thomas wrote a script to
parse the csv files and add the proper SPDX tag to the file, in the
format that the file expected. This script was further refined by Greg
based on the output to detect more types of files automatically and to
distinguish between header and source .c files (which need different
comment types.) Finally Greg ran the script using the .csv files to
generate the patches.
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-11-01 22:07:57 +08:00
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// SPDX-License-Identifier: GPL-2.0
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2009-06-06 21:19:13 +08:00
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/*
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* builtin-annotate.c
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*
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* Builtin annotate command: Analyze the perf.data input file,
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* look up and read DSOs and symbol information and display
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* a histogram of results, along various sorting keys.
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*/
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#include "builtin.h"
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2011-02-04 19:45:46 +08:00
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#include "util/util.h"
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2009-06-06 21:19:13 +08:00
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#include "util/color.h"
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2009-07-02 01:46:08 +08:00
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#include <linux/list.h>
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2009-06-06 21:19:13 +08:00
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#include "util/cache.h"
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2009-07-01 23:28:37 +08:00
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#include <linux/rbtree.h>
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2009-06-06 21:19:13 +08:00
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#include "util/symbol.h"
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#include "perf.h"
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2009-08-17 04:05:48 +08:00
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#include "util/debug.h"
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2009-06-06 21:19:13 +08:00
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2011-03-06 08:40:06 +08:00
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#include "util/evlist.h"
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#include "util/evsel.h"
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2011-02-04 19:45:46 +08:00
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#include "util/annotate.h"
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2009-11-28 02:29:22 +08:00
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#include "util/event.h"
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2015-12-15 23:39:39 +08:00
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#include <subcmd/parse-options.h>
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2009-06-06 21:19:13 +08:00
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#include "util/parse-events.h"
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2009-08-14 18:21:53 +08:00
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#include "util/thread.h"
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2009-09-25 00:02:49 +08:00
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#include "util/sort.h"
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2009-09-28 21:32:55 +08:00
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#include "util/hist.h"
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2019-01-27 20:42:37 +08:00
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#include "util/map.h"
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2009-12-12 07:24:02 +08:00
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#include "util/session.h"
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2011-11-28 18:30:20 +08:00
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#include "util/tool.h"
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2013-10-15 22:27:32 +08:00
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#include "util/data.h"
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2012-10-16 07:33:38 +08:00
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#include "arch/common.h"
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perf annotate: Add branch stack / basic block
I wanted to know the hottest path through a function and figured the
branch-stack (LBR) information should be able to help out with that.
The below uses the branch-stack to create basic blocks and generate
statistics from them.
from to branch_i
* ----> *
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| block
v
* ----> *
from to branch_i+1
The blocks are broken down into non-overlapping ranges, while tracking
if the start of each range is an entry point and/or the end of a range
is a branch.
Each block iterates all ranges it covers (while splitting where required
to exactly match the block) and increments the 'coverage' count.
For the range including the branch we increment the taken counter, as
well as the pred counter if flags.predicted.
Using these number we can find if an instruction:
- had coverage; given by:
br->coverage / br->sym->max_coverage
This metric ensures each symbol has a 100% spot, which reflects the
observation that each symbol must have a most covered/hottest
block.
- is a branch target: br->is_target && br->start == add
- for targets, how much of a branch's coverages comes from it:
target->entry / branch->coverage
- is a branch: br->is_branch && br->end == addr
- for branches, how often it was taken:
br->taken / br->coverage
after all, all execution that didn't take the branch would have
incremented the coverage and continued onward to a later branch.
- for branches, how often it was predicted:
br->pred / br->taken
The coverage percentage is used to color the address and asm sections;
for low (<1%) coverage we use NORMAL (uncolored), indicating that these
instructions are not 'important'. For high coverage (>75%) we color the
address RED.
For each branch, we add an asm comment after the instruction with
information on how often it was taken and predicted.
Output looks like (sans color, which does loose a lot of the
information :/)
$ perf record --branch-filter u,any -e cycles:p ./branches 27
$ perf annotate branches
Percent | Source code & Disassembly of branches for cycles:pu (217 samples)
---------------------------------------------------------------------------------
: branches():
0.00 : 40057a: push %rbp
0.00 : 40057b: mov %rsp,%rbp
0.00 : 40057e: sub $0x20,%rsp
0.00 : 400582: mov %rdi,-0x18(%rbp)
0.00 : 400586: mov %rsi,-0x20(%rbp)
0.00 : 40058a: mov -0x18(%rbp),%rax
0.00 : 40058e: mov %rax,-0x10(%rbp)
0.00 : 400592: movq $0x0,-0x8(%rbp)
0.00 : 40059a: jmpq 400656 <branches+0xdc>
1.84 : 40059f: mov -0x10(%rbp),%rax # +100.00%
3.23 : 4005a3: and $0x1,%eax
1.84 : 4005a6: test %rax,%rax
0.00 : 4005a9: je 4005bf <branches+0x45> # -54.50% (p:42.00%)
0.46 : 4005ab: mov 0x200bbe(%rip),%rax # 601170 <acc>
12.90 : 4005b2: add $0x1,%rax
2.30 : 4005b6: mov %rax,0x200bb3(%rip) # 601170 <acc>
0.46 : 4005bd: jmp 4005d1 <branches+0x57> # -100.00% (p:100.00%)
0.92 : 4005bf: mov 0x200baa(%rip),%rax # 601170 <acc> # +49.54%
13.82 : 4005c6: sub $0x1,%rax
0.46 : 4005ca: mov %rax,0x200b9f(%rip) # 601170 <acc>
2.30 : 4005d1: mov -0x10(%rbp),%rax # +50.46%
0.46 : 4005d5: mov %rax,%rdi
0.46 : 4005d8: callq 400526 <lfsr> # -100.00% (p:100.00%)
0.00 : 4005dd: mov %rax,-0x10(%rbp) # +100.00%
0.92 : 4005e1: mov -0x18(%rbp),%rax
0.00 : 4005e5: and $0x1,%eax
0.00 : 4005e8: test %rax,%rax
0.00 : 4005eb: je 4005ff <branches+0x85> # -100.00% (p:100.00%)
0.00 : 4005ed: mov 0x200b7c(%rip),%rax # 601170 <acc>
0.00 : 4005f4: shr $0x2,%rax
0.00 : 4005f8: mov %rax,0x200b71(%rip) # 601170 <acc>
0.00 : 4005ff: mov -0x10(%rbp),%rax # +100.00%
7.37 : 400603: and $0x1,%eax
3.69 : 400606: test %rax,%rax
0.00 : 400609: jne 400612 <branches+0x98> # -59.25% (p:42.99%)
1.84 : 40060b: mov $0x1,%eax
14.29 : 400610: jmp 400617 <branches+0x9d> # -100.00% (p:100.00%)
1.38 : 400612: mov $0x0,%eax # +57.65%
10.14 : 400617: test %al,%al # +42.35%
0.00 : 400619: je 40062f <branches+0xb5> # -57.65% (p:100.00%)
0.46 : 40061b: mov 0x200b4e(%rip),%rax # 601170 <acc>
2.76 : 400622: sub $0x1,%rax
0.00 : 400626: mov %rax,0x200b43(%rip) # 601170 <acc>
0.46 : 40062d: jmp 400641 <branches+0xc7> # -100.00% (p:100.00%)
0.92 : 40062f: mov 0x200b3a(%rip),%rax # 601170 <acc> # +56.13%
2.30 : 400636: add $0x1,%rax
0.92 : 40063a: mov %rax,0x200b2f(%rip) # 601170 <acc>
0.92 : 400641: mov -0x10(%rbp),%rax # +43.87%
2.30 : 400645: mov %rax,%rdi
0.00 : 400648: callq 400526 <lfsr> # -100.00% (p:100.00%)
0.00 : 40064d: mov %rax,-0x10(%rbp) # +100.00%
1.84 : 400651: addq $0x1,-0x8(%rbp)
0.92 : 400656: mov -0x8(%rbp),%rax
5.07 : 40065a: cmp -0x20(%rbp),%rax
0.00 : 40065e: jb 40059f <branches+0x25> # -100.00% (p:100.00%)
0.00 : 400664: nop
0.00 : 400665: leaveq
0.00 : 400666: retq
(Note: the --branch-filter u,any was used to avoid spurious target and
branch points due to interrupts/faults, they show up as very small -/+
annotations on 'weird' locations)
Committer note:
Please take a look at:
http://vger.kernel.org/~acme/perf/annotate_basic_blocks.png
To see the colors.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Cc: David Carrillo-Cisneros <davidcc@google.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Stephane Eranian <eranian@google.com>
[ Moved sym->max_coverage to 'struct annotate', aka symbol__annotate(sym) ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-09-06 03:08:12 +08:00
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#include "util/block-range.h"
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2009-06-06 21:19:13 +08:00
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2013-09-13 14:27:43 +08:00
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#include <dlfcn.h>
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2017-04-18 21:46:11 +08:00
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#include <errno.h>
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2011-07-04 19:57:50 +08:00
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#include <linux/bitmap.h>
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2011-11-25 18:19:45 +08:00
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struct perf_annotate {
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2011-11-28 18:30:20 +08:00
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struct perf_tool tool;
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2014-08-12 14:40:35 +08:00
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struct perf_session *session;
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2018-05-26 04:28:37 +08:00
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struct annotation_options opts;
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2018-03-16 10:44:34 +08:00
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bool use_tui, use_stdio, use_stdio2, use_gtk;
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2013-02-07 17:02:14 +08:00
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bool skip_missing;
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perf annotate: Support to display the IPC/Cycle in TUI mode
Unlike the perf report interactive annotate mode, the perf annotate
doesn't display the IPC/Cycle even if branch info is recorded in perf
data file.
perf record -b ...
perf annotate function
It should show IPC/cycle, but it doesn't.
This patch lets perf annotate support the displaying of IPC/Cycle if
branch info is in perf data.
For example,
perf annotate compute_flag
Percent│ IPC Cycle
│
│
│ Disassembly of section .text:
│
│ 0000000000400640 <compute_flag>:
│ compute_flag():
│ volatile int count;
│ static unsigned int s_randseed;
│
│ __attribute__((noinline))
│ int compute_flag()
│ {
22.96 │1.18 584 sub $0x8,%rsp
│ int i;
│
│ i = rand() % 2;
23.02 │1.18 1 → callq rand@plt
│
│ return i;
27.05 │3.37 mov %eax,%edx
│ }
│3.37 add $0x8,%rsp
│ {
│ int i;
│
│ i = rand() % 2;
│
│ return i;
│3.37 shr $0x1f,%edx
│3.37 add %edx,%eax
│3.37 and $0x1,%eax
│3.37 sub %edx,%eax
│ }
26.97 │3.37 2 ← retq
Note that, this patch only supports TUI mode. For stdio, now it just keeps
original behavior. Will support it in a follow-up patch.
$ perf annotate compute_flag --stdio
Percent | Source code & Disassembly of div for cycles:ppp (7993 samples)
------------------------------------------------------------------------------
:
:
:
: Disassembly of section .text:
:
: 0000000000400640 <compute_flag>:
: compute_flag():
: volatile int count;
: static unsigned int s_randseed;
:
: __attribute__((noinline))
: int compute_flag()
: {
0.29 : 400640: sub $0x8,%rsp # +100.00%
: int i;
:
: i = rand() % 2;
42.93 : 400644: callq 400490 <rand@plt> # -100.00% (p:100.00%)
:
: return i;
0.10 : 400649: mov %eax,%edx # +100.00%
: }
0.94 : 40064b: add $0x8,%rsp
: {
: int i;
:
: i = rand() % 2;
:
: return i;
27.02 : 40064f: shr $0x1f,%edx
0.15 : 400652: add %edx,%eax
1.24 : 400654: and $0x1,%eax
2.08 : 400657: sub %edx,%eax
: }
25.26 : 400659: retq # -100.00% (p:100.00%)
Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
Acked-by: Andi Kleen <ak@linux.intel.com>
Link: http://lkml.kernel.org/r/20180223170210.GC7045@tassilo.jf.intel.com
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1519724327-7773-1-git-send-email-yao.jin@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2018-02-27 17:38:47 +08:00
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bool has_br_stack;
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perf annotate: Support '--group' option
With the '--group' option, even for non-explicit group, 'perf annotate'
will enable the group output.
For example,
$ perf record -e cycles,branches ./div
$ perf annotate main --stdio --group
: Disassembly of section .text:
:
: 00000000004004b0 <main>:
: main():
:
: return i;
: }
:
: int main(void)
: {
0.00 0.00 : 4004b0: push %rbx
: int i;
: int flag;
: volatile double x = 1212121212, y = 121212;
:
: s_randseed = time(0);
0.00 0.00 : 4004b1: xor %edi,%edi
: srand(s_randseed);
0.00 0.00 : 4004b3: mov $0x77359400,%ebx
:
: return i;
: }
:
But if without --group, there is only one event reported.
$ perf annotate main --stdio
: Disassembly of section .text:
:
: 00000000004004b0 <main>:
: main():
:
: return i;
: }
:
: int main(void)
: {
0.00 : 4004b0: push %rbx
: int i;
: int flag;
: volatile double x = 1212121212, y = 121212;
:
: s_randseed = time(0);
0.00 : 4004b1: xor %edi,%edi
: srand(s_randseed);
0.00 : 4004b3: mov $0x77359400,%ebx
:
: return i;
: }
Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1526914666-31839-4-git-send-email-yao.jin@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2018-05-21 22:57:46 +08:00
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bool group_set;
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2011-11-17 22:33:21 +08:00
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const char *sym_hist_filter;
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const char *cpu_list;
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DECLARE_BITMAP(cpu_bitmap, MAX_NR_CPUS);
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2011-11-25 18:19:45 +08:00
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};
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2011-07-04 19:57:50 +08:00
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perf annotate: Add branch stack / basic block
I wanted to know the hottest path through a function and figured the
branch-stack (LBR) information should be able to help out with that.
The below uses the branch-stack to create basic blocks and generate
statistics from them.
from to branch_i
* ----> *
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| block
v
* ----> *
from to branch_i+1
The blocks are broken down into non-overlapping ranges, while tracking
if the start of each range is an entry point and/or the end of a range
is a branch.
Each block iterates all ranges it covers (while splitting where required
to exactly match the block) and increments the 'coverage' count.
For the range including the branch we increment the taken counter, as
well as the pred counter if flags.predicted.
Using these number we can find if an instruction:
- had coverage; given by:
br->coverage / br->sym->max_coverage
This metric ensures each symbol has a 100% spot, which reflects the
observation that each symbol must have a most covered/hottest
block.
- is a branch target: br->is_target && br->start == add
- for targets, how much of a branch's coverages comes from it:
target->entry / branch->coverage
- is a branch: br->is_branch && br->end == addr
- for branches, how often it was taken:
br->taken / br->coverage
after all, all execution that didn't take the branch would have
incremented the coverage and continued onward to a later branch.
- for branches, how often it was predicted:
br->pred / br->taken
The coverage percentage is used to color the address and asm sections;
for low (<1%) coverage we use NORMAL (uncolored), indicating that these
instructions are not 'important'. For high coverage (>75%) we color the
address RED.
For each branch, we add an asm comment after the instruction with
information on how often it was taken and predicted.
Output looks like (sans color, which does loose a lot of the
information :/)
$ perf record --branch-filter u,any -e cycles:p ./branches 27
$ perf annotate branches
Percent | Source code & Disassembly of branches for cycles:pu (217 samples)
---------------------------------------------------------------------------------
: branches():
0.00 : 40057a: push %rbp
0.00 : 40057b: mov %rsp,%rbp
0.00 : 40057e: sub $0x20,%rsp
0.00 : 400582: mov %rdi,-0x18(%rbp)
0.00 : 400586: mov %rsi,-0x20(%rbp)
0.00 : 40058a: mov -0x18(%rbp),%rax
0.00 : 40058e: mov %rax,-0x10(%rbp)
0.00 : 400592: movq $0x0,-0x8(%rbp)
0.00 : 40059a: jmpq 400656 <branches+0xdc>
1.84 : 40059f: mov -0x10(%rbp),%rax # +100.00%
3.23 : 4005a3: and $0x1,%eax
1.84 : 4005a6: test %rax,%rax
0.00 : 4005a9: je 4005bf <branches+0x45> # -54.50% (p:42.00%)
0.46 : 4005ab: mov 0x200bbe(%rip),%rax # 601170 <acc>
12.90 : 4005b2: add $0x1,%rax
2.30 : 4005b6: mov %rax,0x200bb3(%rip) # 601170 <acc>
0.46 : 4005bd: jmp 4005d1 <branches+0x57> # -100.00% (p:100.00%)
0.92 : 4005bf: mov 0x200baa(%rip),%rax # 601170 <acc> # +49.54%
13.82 : 4005c6: sub $0x1,%rax
0.46 : 4005ca: mov %rax,0x200b9f(%rip) # 601170 <acc>
2.30 : 4005d1: mov -0x10(%rbp),%rax # +50.46%
0.46 : 4005d5: mov %rax,%rdi
0.46 : 4005d8: callq 400526 <lfsr> # -100.00% (p:100.00%)
0.00 : 4005dd: mov %rax,-0x10(%rbp) # +100.00%
0.92 : 4005e1: mov -0x18(%rbp),%rax
0.00 : 4005e5: and $0x1,%eax
0.00 : 4005e8: test %rax,%rax
0.00 : 4005eb: je 4005ff <branches+0x85> # -100.00% (p:100.00%)
0.00 : 4005ed: mov 0x200b7c(%rip),%rax # 601170 <acc>
0.00 : 4005f4: shr $0x2,%rax
0.00 : 4005f8: mov %rax,0x200b71(%rip) # 601170 <acc>
0.00 : 4005ff: mov -0x10(%rbp),%rax # +100.00%
7.37 : 400603: and $0x1,%eax
3.69 : 400606: test %rax,%rax
0.00 : 400609: jne 400612 <branches+0x98> # -59.25% (p:42.99%)
1.84 : 40060b: mov $0x1,%eax
14.29 : 400610: jmp 400617 <branches+0x9d> # -100.00% (p:100.00%)
1.38 : 400612: mov $0x0,%eax # +57.65%
10.14 : 400617: test %al,%al # +42.35%
0.00 : 400619: je 40062f <branches+0xb5> # -57.65% (p:100.00%)
0.46 : 40061b: mov 0x200b4e(%rip),%rax # 601170 <acc>
2.76 : 400622: sub $0x1,%rax
0.00 : 400626: mov %rax,0x200b43(%rip) # 601170 <acc>
0.46 : 40062d: jmp 400641 <branches+0xc7> # -100.00% (p:100.00%)
0.92 : 40062f: mov 0x200b3a(%rip),%rax # 601170 <acc> # +56.13%
2.30 : 400636: add $0x1,%rax
0.92 : 40063a: mov %rax,0x200b2f(%rip) # 601170 <acc>
0.92 : 400641: mov -0x10(%rbp),%rax # +43.87%
2.30 : 400645: mov %rax,%rdi
0.00 : 400648: callq 400526 <lfsr> # -100.00% (p:100.00%)
0.00 : 40064d: mov %rax,-0x10(%rbp) # +100.00%
1.84 : 400651: addq $0x1,-0x8(%rbp)
0.92 : 400656: mov -0x8(%rbp),%rax
5.07 : 40065a: cmp -0x20(%rbp),%rax
0.00 : 40065e: jb 40059f <branches+0x25> # -100.00% (p:100.00%)
0.00 : 400664: nop
0.00 : 400665: leaveq
0.00 : 400666: retq
(Note: the --branch-filter u,any was used to avoid spurious target and
branch points due to interrupts/faults, they show up as very small -/+
annotations on 'weird' locations)
Committer note:
Please take a look at:
http://vger.kernel.org/~acme/perf/annotate_basic_blocks.png
To see the colors.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Cc: David Carrillo-Cisneros <davidcc@google.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Stephane Eranian <eranian@google.com>
[ Moved sym->max_coverage to 'struct annotate', aka symbol__annotate(sym) ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-09-06 03:08:12 +08:00
|
|
|
/*
|
|
|
|
|
* Given one basic block:
|
|
|
|
|
*
|
|
|
|
|
* from to branch_i
|
|
|
|
|
* * ----> *
|
|
|
|
|
* |
|
|
|
|
|
* | block
|
|
|
|
|
* v
|
|
|
|
|
* * ----> *
|
|
|
|
|
* from to branch_i+1
|
|
|
|
|
*
|
|
|
|
|
* where the horizontal are the branches and the vertical is the executed
|
|
|
|
|
* block of instructions.
|
|
|
|
|
*
|
|
|
|
|
* We count, for each 'instruction', the number of blocks that covered it as
|
|
|
|
|
* well as count the ratio each branch is taken.
|
|
|
|
|
*
|
|
|
|
|
* We can do this without knowing the actual instruction stream by keeping
|
|
|
|
|
* track of the address ranges. We break down ranges such that there is no
|
|
|
|
|
* overlap and iterate from the start until the end.
|
|
|
|
|
*
|
|
|
|
|
* @acme: once we parse the objdump output _before_ processing the samples,
|
|
|
|
|
* we can easily fold the branch.cycles IPC bits in.
|
|
|
|
|
*/
|
|
|
|
|
static void process_basic_block(struct addr_map_symbol *start,
|
|
|
|
|
struct addr_map_symbol *end,
|
|
|
|
|
struct branch_flags *flags)
|
|
|
|
|
{
|
|
|
|
|
struct symbol *sym = start->sym;
|
|
|
|
|
struct annotation *notes = sym ? symbol__annotation(sym) : NULL;
|
|
|
|
|
struct block_range_iter iter;
|
|
|
|
|
struct block_range *entry;
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Sanity; NULL isn't executable and the CPU cannot execute backwards
|
|
|
|
|
*/
|
|
|
|
|
if (!start->addr || start->addr > end->addr)
|
|
|
|
|
return;
|
|
|
|
|
|
|
|
|
|
iter = block_range__create(start->addr, end->addr);
|
|
|
|
|
if (!block_range_iter__valid(&iter))
|
|
|
|
|
return;
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* First block in range is a branch target.
|
|
|
|
|
*/
|
|
|
|
|
entry = block_range_iter(&iter);
|
|
|
|
|
assert(entry->is_target);
|
|
|
|
|
entry->entry++;
|
|
|
|
|
|
|
|
|
|
do {
|
|
|
|
|
entry = block_range_iter(&iter);
|
|
|
|
|
|
|
|
|
|
entry->coverage++;
|
|
|
|
|
entry->sym = sym;
|
|
|
|
|
|
|
|
|
|
if (notes)
|
|
|
|
|
notes->max_coverage = max(notes->max_coverage, entry->coverage);
|
|
|
|
|
|
|
|
|
|
} while (block_range_iter__next(&iter));
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Last block in rage is a branch.
|
|
|
|
|
*/
|
|
|
|
|
entry = block_range_iter(&iter);
|
|
|
|
|
assert(entry->is_branch);
|
|
|
|
|
entry->taken++;
|
|
|
|
|
if (flags->predicted)
|
|
|
|
|
entry->pred++;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void process_branch_stack(struct branch_stack *bs, struct addr_location *al,
|
|
|
|
|
struct perf_sample *sample)
|
|
|
|
|
{
|
|
|
|
|
struct addr_map_symbol *prev = NULL;
|
|
|
|
|
struct branch_info *bi;
|
|
|
|
|
int i;
|
|
|
|
|
|
|
|
|
|
if (!bs || !bs->nr)
|
|
|
|
|
return;
|
|
|
|
|
|
|
|
|
|
bi = sample__resolve_bstack(sample, al);
|
|
|
|
|
if (!bi)
|
|
|
|
|
return;
|
|
|
|
|
|
|
|
|
|
for (i = bs->nr - 1; i >= 0; i--) {
|
|
|
|
|
/*
|
|
|
|
|
* XXX filter against symbol
|
|
|
|
|
*/
|
|
|
|
|
if (prev)
|
|
|
|
|
process_basic_block(prev, &bi[i].from, &bi[i].flags);
|
|
|
|
|
prev = &bi[i].to;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
free(bi);
|
|
|
|
|
}
|
|
|
|
|
|
perf annotate: Support to display the IPC/Cycle in TUI mode
Unlike the perf report interactive annotate mode, the perf annotate
doesn't display the IPC/Cycle even if branch info is recorded in perf
data file.
perf record -b ...
perf annotate function
It should show IPC/cycle, but it doesn't.
This patch lets perf annotate support the displaying of IPC/Cycle if
branch info is in perf data.
For example,
perf annotate compute_flag
Percent│ IPC Cycle
│
│
│ Disassembly of section .text:
│
│ 0000000000400640 <compute_flag>:
│ compute_flag():
│ volatile int count;
│ static unsigned int s_randseed;
│
│ __attribute__((noinline))
│ int compute_flag()
│ {
22.96 │1.18 584 sub $0x8,%rsp
│ int i;
│
│ i = rand() % 2;
23.02 │1.18 1 → callq rand@plt
│
│ return i;
27.05 │3.37 mov %eax,%edx
│ }
│3.37 add $0x8,%rsp
│ {
│ int i;
│
│ i = rand() % 2;
│
│ return i;
│3.37 shr $0x1f,%edx
│3.37 add %edx,%eax
│3.37 and $0x1,%eax
│3.37 sub %edx,%eax
│ }
26.97 │3.37 2 ← retq
Note that, this patch only supports TUI mode. For stdio, now it just keeps
original behavior. Will support it in a follow-up patch.
$ perf annotate compute_flag --stdio
Percent | Source code & Disassembly of div for cycles:ppp (7993 samples)
------------------------------------------------------------------------------
:
:
:
: Disassembly of section .text:
:
: 0000000000400640 <compute_flag>:
: compute_flag():
: volatile int count;
: static unsigned int s_randseed;
:
: __attribute__((noinline))
: int compute_flag()
: {
0.29 : 400640: sub $0x8,%rsp # +100.00%
: int i;
:
: i = rand() % 2;
42.93 : 400644: callq 400490 <rand@plt> # -100.00% (p:100.00%)
:
: return i;
0.10 : 400649: mov %eax,%edx # +100.00%
: }
0.94 : 40064b: add $0x8,%rsp
: {
: int i;
:
: i = rand() % 2;
:
: return i;
27.02 : 40064f: shr $0x1f,%edx
0.15 : 400652: add %edx,%eax
1.24 : 400654: and $0x1,%eax
2.08 : 400657: sub %edx,%eax
: }
25.26 : 400659: retq # -100.00% (p:100.00%)
Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
Acked-by: Andi Kleen <ak@linux.intel.com>
Link: http://lkml.kernel.org/r/20180223170210.GC7045@tassilo.jf.intel.com
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1519724327-7773-1-git-send-email-yao.jin@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2018-02-27 17:38:47 +08:00
|
|
|
static int hist_iter__branch_callback(struct hist_entry_iter *iter,
|
|
|
|
|
struct addr_location *al __maybe_unused,
|
|
|
|
|
bool single __maybe_unused,
|
|
|
|
|
void *arg __maybe_unused)
|
|
|
|
|
{
|
|
|
|
|
struct hist_entry *he = iter->he;
|
|
|
|
|
struct branch_info *bi;
|
|
|
|
|
struct perf_sample *sample = iter->sample;
|
|
|
|
|
struct perf_evsel *evsel = iter->evsel;
|
|
|
|
|
int err;
|
|
|
|
|
|
|
|
|
|
hist__account_cycles(sample->branch_stack, al, sample, false);
|
|
|
|
|
|
|
|
|
|
bi = he->branch_info;
|
2018-05-24 23:05:39 +08:00
|
|
|
err = addr_map_symbol__inc_samples(&bi->from, sample, evsel);
|
perf annotate: Support to display the IPC/Cycle in TUI mode
Unlike the perf report interactive annotate mode, the perf annotate
doesn't display the IPC/Cycle even if branch info is recorded in perf
data file.
perf record -b ...
perf annotate function
It should show IPC/cycle, but it doesn't.
This patch lets perf annotate support the displaying of IPC/Cycle if
branch info is in perf data.
For example,
perf annotate compute_flag
Percent│ IPC Cycle
│
│
│ Disassembly of section .text:
│
│ 0000000000400640 <compute_flag>:
│ compute_flag():
│ volatile int count;
│ static unsigned int s_randseed;
│
│ __attribute__((noinline))
│ int compute_flag()
│ {
22.96 │1.18 584 sub $0x8,%rsp
│ int i;
│
│ i = rand() % 2;
23.02 │1.18 1 → callq rand@plt
│
│ return i;
27.05 │3.37 mov %eax,%edx
│ }
│3.37 add $0x8,%rsp
│ {
│ int i;
│
│ i = rand() % 2;
│
│ return i;
│3.37 shr $0x1f,%edx
│3.37 add %edx,%eax
│3.37 and $0x1,%eax
│3.37 sub %edx,%eax
│ }
26.97 │3.37 2 ← retq
Note that, this patch only supports TUI mode. For stdio, now it just keeps
original behavior. Will support it in a follow-up patch.
$ perf annotate compute_flag --stdio
Percent | Source code & Disassembly of div for cycles:ppp (7993 samples)
------------------------------------------------------------------------------
:
:
:
: Disassembly of section .text:
:
: 0000000000400640 <compute_flag>:
: compute_flag():
: volatile int count;
: static unsigned int s_randseed;
:
: __attribute__((noinline))
: int compute_flag()
: {
0.29 : 400640: sub $0x8,%rsp # +100.00%
: int i;
:
: i = rand() % 2;
42.93 : 400644: callq 400490 <rand@plt> # -100.00% (p:100.00%)
:
: return i;
0.10 : 400649: mov %eax,%edx # +100.00%
: }
0.94 : 40064b: add $0x8,%rsp
: {
: int i;
:
: i = rand() % 2;
:
: return i;
27.02 : 40064f: shr $0x1f,%edx
0.15 : 400652: add %edx,%eax
1.24 : 400654: and $0x1,%eax
2.08 : 400657: sub %edx,%eax
: }
25.26 : 400659: retq # -100.00% (p:100.00%)
Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
Acked-by: Andi Kleen <ak@linux.intel.com>
Link: http://lkml.kernel.org/r/20180223170210.GC7045@tassilo.jf.intel.com
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1519724327-7773-1-git-send-email-yao.jin@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2018-02-27 17:38:47 +08:00
|
|
|
|
|
|
|
|
if (err)
|
|
|
|
|
goto out;
|
|
|
|
|
|
2018-05-24 23:05:39 +08:00
|
|
|
err = addr_map_symbol__inc_samples(&bi->to, sample, evsel);
|
perf annotate: Support to display the IPC/Cycle in TUI mode
Unlike the perf report interactive annotate mode, the perf annotate
doesn't display the IPC/Cycle even if branch info is recorded in perf
data file.
perf record -b ...
perf annotate function
It should show IPC/cycle, but it doesn't.
This patch lets perf annotate support the displaying of IPC/Cycle if
branch info is in perf data.
For example,
perf annotate compute_flag
Percent│ IPC Cycle
│
│
│ Disassembly of section .text:
│
│ 0000000000400640 <compute_flag>:
│ compute_flag():
│ volatile int count;
│ static unsigned int s_randseed;
│
│ __attribute__((noinline))
│ int compute_flag()
│ {
22.96 │1.18 584 sub $0x8,%rsp
│ int i;
│
│ i = rand() % 2;
23.02 │1.18 1 → callq rand@plt
│
│ return i;
27.05 │3.37 mov %eax,%edx
│ }
│3.37 add $0x8,%rsp
│ {
│ int i;
│
│ i = rand() % 2;
│
│ return i;
│3.37 shr $0x1f,%edx
│3.37 add %edx,%eax
│3.37 and $0x1,%eax
│3.37 sub %edx,%eax
│ }
26.97 │3.37 2 ← retq
Note that, this patch only supports TUI mode. For stdio, now it just keeps
original behavior. Will support it in a follow-up patch.
$ perf annotate compute_flag --stdio
Percent | Source code & Disassembly of div for cycles:ppp (7993 samples)
------------------------------------------------------------------------------
:
:
:
: Disassembly of section .text:
:
: 0000000000400640 <compute_flag>:
: compute_flag():
: volatile int count;
: static unsigned int s_randseed;
:
: __attribute__((noinline))
: int compute_flag()
: {
0.29 : 400640: sub $0x8,%rsp # +100.00%
: int i;
:
: i = rand() % 2;
42.93 : 400644: callq 400490 <rand@plt> # -100.00% (p:100.00%)
:
: return i;
0.10 : 400649: mov %eax,%edx # +100.00%
: }
0.94 : 40064b: add $0x8,%rsp
: {
: int i;
:
: i = rand() % 2;
:
: return i;
27.02 : 40064f: shr $0x1f,%edx
0.15 : 400652: add %edx,%eax
1.24 : 400654: and $0x1,%eax
2.08 : 400657: sub %edx,%eax
: }
25.26 : 400659: retq # -100.00% (p:100.00%)
Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
Acked-by: Andi Kleen <ak@linux.intel.com>
Link: http://lkml.kernel.org/r/20180223170210.GC7045@tassilo.jf.intel.com
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1519724327-7773-1-git-send-email-yao.jin@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2018-02-27 17:38:47 +08:00
|
|
|
|
|
|
|
|
out:
|
|
|
|
|
return err;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int process_branch_callback(struct perf_evsel *evsel,
|
|
|
|
|
struct perf_sample *sample,
|
|
|
|
|
struct addr_location *al __maybe_unused,
|
|
|
|
|
struct perf_annotate *ann,
|
|
|
|
|
struct machine *machine)
|
|
|
|
|
{
|
|
|
|
|
struct hist_entry_iter iter = {
|
|
|
|
|
.evsel = evsel,
|
|
|
|
|
.sample = sample,
|
|
|
|
|
.add_entry_cb = hist_iter__branch_callback,
|
|
|
|
|
.hide_unresolved = symbol_conf.hide_unresolved,
|
|
|
|
|
.ops = &hist_iter_branch,
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
struct addr_location a;
|
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
|
|
if (machine__resolve(machine, &a, sample) < 0)
|
|
|
|
|
return -1;
|
|
|
|
|
|
|
|
|
|
if (a.sym == NULL)
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
|
|
if (a.map != NULL)
|
|
|
|
|
a.map->dso->hit = 1;
|
|
|
|
|
|
|
|
|
|
ret = hist_entry_iter__add(&iter, &a, PERF_MAX_STACK_DEPTH, ann);
|
|
|
|
|
return ret;
|
|
|
|
|
}
|
|
|
|
|
|
2018-03-16 10:44:34 +08:00
|
|
|
static bool has_annotation(struct perf_annotate *ann)
|
|
|
|
|
{
|
|
|
|
|
return ui__has_annotation() || ann->use_stdio2;
|
|
|
|
|
}
|
|
|
|
|
|
2011-11-12 08:17:32 +08:00
|
|
|
static int perf_evsel__add_sample(struct perf_evsel *evsel,
|
2015-12-23 01:06:58 +08:00
|
|
|
struct perf_sample *sample,
|
2011-11-25 18:19:45 +08:00
|
|
|
struct addr_location *al,
|
perf annotate: Support to display the IPC/Cycle in TUI mode
Unlike the perf report interactive annotate mode, the perf annotate
doesn't display the IPC/Cycle even if branch info is recorded in perf
data file.
perf record -b ...
perf annotate function
It should show IPC/cycle, but it doesn't.
This patch lets perf annotate support the displaying of IPC/Cycle if
branch info is in perf data.
For example,
perf annotate compute_flag
Percent│ IPC Cycle
│
│
│ Disassembly of section .text:
│
│ 0000000000400640 <compute_flag>:
│ compute_flag():
│ volatile int count;
│ static unsigned int s_randseed;
│
│ __attribute__((noinline))
│ int compute_flag()
│ {
22.96 │1.18 584 sub $0x8,%rsp
│ int i;
│
│ i = rand() % 2;
23.02 │1.18 1 → callq rand@plt
│
│ return i;
27.05 │3.37 mov %eax,%edx
│ }
│3.37 add $0x8,%rsp
│ {
│ int i;
│
│ i = rand() % 2;
│
│ return i;
│3.37 shr $0x1f,%edx
│3.37 add %edx,%eax
│3.37 and $0x1,%eax
│3.37 sub %edx,%eax
│ }
26.97 │3.37 2 ← retq
Note that, this patch only supports TUI mode. For stdio, now it just keeps
original behavior. Will support it in a follow-up patch.
$ perf annotate compute_flag --stdio
Percent | Source code & Disassembly of div for cycles:ppp (7993 samples)
------------------------------------------------------------------------------
:
:
:
: Disassembly of section .text:
:
: 0000000000400640 <compute_flag>:
: compute_flag():
: volatile int count;
: static unsigned int s_randseed;
:
: __attribute__((noinline))
: int compute_flag()
: {
0.29 : 400640: sub $0x8,%rsp # +100.00%
: int i;
:
: i = rand() % 2;
42.93 : 400644: callq 400490 <rand@plt> # -100.00% (p:100.00%)
:
: return i;
0.10 : 400649: mov %eax,%edx # +100.00%
: }
0.94 : 40064b: add $0x8,%rsp
: {
: int i;
:
: i = rand() % 2;
:
: return i;
27.02 : 40064f: shr $0x1f,%edx
0.15 : 400652: add %edx,%eax
1.24 : 400654: and $0x1,%eax
2.08 : 400657: sub %edx,%eax
: }
25.26 : 400659: retq # -100.00% (p:100.00%)
Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
Acked-by: Andi Kleen <ak@linux.intel.com>
Link: http://lkml.kernel.org/r/20180223170210.GC7045@tassilo.jf.intel.com
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1519724327-7773-1-git-send-email-yao.jin@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2018-02-27 17:38:47 +08:00
|
|
|
struct perf_annotate *ann,
|
|
|
|
|
struct machine *machine)
|
2009-06-06 21:19:13 +08:00
|
|
|
{
|
2014-10-10 00:13:41 +08:00
|
|
|
struct hists *hists = evsel__hists(evsel);
|
2010-02-25 23:57:40 +08:00
|
|
|
struct hist_entry *he;
|
2011-03-06 08:40:06 +08:00
|
|
|
int ret;
|
2010-02-25 23:57:40 +08:00
|
|
|
|
2018-03-16 10:44:34 +08:00
|
|
|
if ((!ann->has_br_stack || !has_annotation(ann)) &&
|
perf annotate: Support to display the IPC/Cycle in TUI mode
Unlike the perf report interactive annotate mode, the perf annotate
doesn't display the IPC/Cycle even if branch info is recorded in perf
data file.
perf record -b ...
perf annotate function
It should show IPC/cycle, but it doesn't.
This patch lets perf annotate support the displaying of IPC/Cycle if
branch info is in perf data.
For example,
perf annotate compute_flag
Percent│ IPC Cycle
│
│
│ Disassembly of section .text:
│
│ 0000000000400640 <compute_flag>:
│ compute_flag():
│ volatile int count;
│ static unsigned int s_randseed;
│
│ __attribute__((noinline))
│ int compute_flag()
│ {
22.96 │1.18 584 sub $0x8,%rsp
│ int i;
│
│ i = rand() % 2;
23.02 │1.18 1 → callq rand@plt
│
│ return i;
27.05 │3.37 mov %eax,%edx
│ }
│3.37 add $0x8,%rsp
│ {
│ int i;
│
│ i = rand() % 2;
│
│ return i;
│3.37 shr $0x1f,%edx
│3.37 add %edx,%eax
│3.37 and $0x1,%eax
│3.37 sub %edx,%eax
│ }
26.97 │3.37 2 ← retq
Note that, this patch only supports TUI mode. For stdio, now it just keeps
original behavior. Will support it in a follow-up patch.
$ perf annotate compute_flag --stdio
Percent | Source code & Disassembly of div for cycles:ppp (7993 samples)
------------------------------------------------------------------------------
:
:
:
: Disassembly of section .text:
:
: 0000000000400640 <compute_flag>:
: compute_flag():
: volatile int count;
: static unsigned int s_randseed;
:
: __attribute__((noinline))
: int compute_flag()
: {
0.29 : 400640: sub $0x8,%rsp # +100.00%
: int i;
:
: i = rand() % 2;
42.93 : 400644: callq 400490 <rand@plt> # -100.00% (p:100.00%)
:
: return i;
0.10 : 400649: mov %eax,%edx # +100.00%
: }
0.94 : 40064b: add $0x8,%rsp
: {
: int i;
:
: i = rand() % 2;
:
: return i;
27.02 : 40064f: shr $0x1f,%edx
0.15 : 400652: add %edx,%eax
1.24 : 400654: and $0x1,%eax
2.08 : 400657: sub %edx,%eax
: }
25.26 : 400659: retq # -100.00% (p:100.00%)
Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
Acked-by: Andi Kleen <ak@linux.intel.com>
Link: http://lkml.kernel.org/r/20180223170210.GC7045@tassilo.jf.intel.com
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1519724327-7773-1-git-send-email-yao.jin@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2018-02-27 17:38:47 +08:00
|
|
|
ann->sym_hist_filter != NULL &&
|
2011-11-17 22:33:21 +08:00
|
|
|
(al->sym == NULL ||
|
|
|
|
|
strcmp(ann->sym_hist_filter, al->sym->name) != 0)) {
|
2010-02-25 23:57:40 +08:00
|
|
|
/* We're only interested in a symbol named sym_hist_filter */
|
2015-05-26 02:30:09 +08:00
|
|
|
/*
|
|
|
|
|
* FIXME: why isn't this done in the symbol_filter when loading
|
|
|
|
|
* the DSO?
|
|
|
|
|
*/
|
2010-02-25 23:57:40 +08:00
|
|
|
if (al->sym != NULL) {
|
2018-12-07 03:18:17 +08:00
|
|
|
rb_erase_cached(&al->sym->rb_node,
|
2018-04-27 03:52:34 +08:00
|
|
|
&al->map->dso->symbols);
|
2010-02-25 23:57:40 +08:00
|
|
|
symbol__delete(al->sym);
|
2015-08-25 00:33:14 +08:00
|
|
|
dso__reset_find_symbol_cache(al->map->dso);
|
2010-02-25 23:57:40 +08:00
|
|
|
}
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
perf annotate: Add branch stack / basic block
I wanted to know the hottest path through a function and figured the
branch-stack (LBR) information should be able to help out with that.
The below uses the branch-stack to create basic blocks and generate
statistics from them.
from to branch_i
* ----> *
|
| block
v
* ----> *
from to branch_i+1
The blocks are broken down into non-overlapping ranges, while tracking
if the start of each range is an entry point and/or the end of a range
is a branch.
Each block iterates all ranges it covers (while splitting where required
to exactly match the block) and increments the 'coverage' count.
For the range including the branch we increment the taken counter, as
well as the pred counter if flags.predicted.
Using these number we can find if an instruction:
- had coverage; given by:
br->coverage / br->sym->max_coverage
This metric ensures each symbol has a 100% spot, which reflects the
observation that each symbol must have a most covered/hottest
block.
- is a branch target: br->is_target && br->start == add
- for targets, how much of a branch's coverages comes from it:
target->entry / branch->coverage
- is a branch: br->is_branch && br->end == addr
- for branches, how often it was taken:
br->taken / br->coverage
after all, all execution that didn't take the branch would have
incremented the coverage and continued onward to a later branch.
- for branches, how often it was predicted:
br->pred / br->taken
The coverage percentage is used to color the address and asm sections;
for low (<1%) coverage we use NORMAL (uncolored), indicating that these
instructions are not 'important'. For high coverage (>75%) we color the
address RED.
For each branch, we add an asm comment after the instruction with
information on how often it was taken and predicted.
Output looks like (sans color, which does loose a lot of the
information :/)
$ perf record --branch-filter u,any -e cycles:p ./branches 27
$ perf annotate branches
Percent | Source code & Disassembly of branches for cycles:pu (217 samples)
---------------------------------------------------------------------------------
: branches():
0.00 : 40057a: push %rbp
0.00 : 40057b: mov %rsp,%rbp
0.00 : 40057e: sub $0x20,%rsp
0.00 : 400582: mov %rdi,-0x18(%rbp)
0.00 : 400586: mov %rsi,-0x20(%rbp)
0.00 : 40058a: mov -0x18(%rbp),%rax
0.00 : 40058e: mov %rax,-0x10(%rbp)
0.00 : 400592: movq $0x0,-0x8(%rbp)
0.00 : 40059a: jmpq 400656 <branches+0xdc>
1.84 : 40059f: mov -0x10(%rbp),%rax # +100.00%
3.23 : 4005a3: and $0x1,%eax
1.84 : 4005a6: test %rax,%rax
0.00 : 4005a9: je 4005bf <branches+0x45> # -54.50% (p:42.00%)
0.46 : 4005ab: mov 0x200bbe(%rip),%rax # 601170 <acc>
12.90 : 4005b2: add $0x1,%rax
2.30 : 4005b6: mov %rax,0x200bb3(%rip) # 601170 <acc>
0.46 : 4005bd: jmp 4005d1 <branches+0x57> # -100.00% (p:100.00%)
0.92 : 4005bf: mov 0x200baa(%rip),%rax # 601170 <acc> # +49.54%
13.82 : 4005c6: sub $0x1,%rax
0.46 : 4005ca: mov %rax,0x200b9f(%rip) # 601170 <acc>
2.30 : 4005d1: mov -0x10(%rbp),%rax # +50.46%
0.46 : 4005d5: mov %rax,%rdi
0.46 : 4005d8: callq 400526 <lfsr> # -100.00% (p:100.00%)
0.00 : 4005dd: mov %rax,-0x10(%rbp) # +100.00%
0.92 : 4005e1: mov -0x18(%rbp),%rax
0.00 : 4005e5: and $0x1,%eax
0.00 : 4005e8: test %rax,%rax
0.00 : 4005eb: je 4005ff <branches+0x85> # -100.00% (p:100.00%)
0.00 : 4005ed: mov 0x200b7c(%rip),%rax # 601170 <acc>
0.00 : 4005f4: shr $0x2,%rax
0.00 : 4005f8: mov %rax,0x200b71(%rip) # 601170 <acc>
0.00 : 4005ff: mov -0x10(%rbp),%rax # +100.00%
7.37 : 400603: and $0x1,%eax
3.69 : 400606: test %rax,%rax
0.00 : 400609: jne 400612 <branches+0x98> # -59.25% (p:42.99%)
1.84 : 40060b: mov $0x1,%eax
14.29 : 400610: jmp 400617 <branches+0x9d> # -100.00% (p:100.00%)
1.38 : 400612: mov $0x0,%eax # +57.65%
10.14 : 400617: test %al,%al # +42.35%
0.00 : 400619: je 40062f <branches+0xb5> # -57.65% (p:100.00%)
0.46 : 40061b: mov 0x200b4e(%rip),%rax # 601170 <acc>
2.76 : 400622: sub $0x1,%rax
0.00 : 400626: mov %rax,0x200b43(%rip) # 601170 <acc>
0.46 : 40062d: jmp 400641 <branches+0xc7> # -100.00% (p:100.00%)
0.92 : 40062f: mov 0x200b3a(%rip),%rax # 601170 <acc> # +56.13%
2.30 : 400636: add $0x1,%rax
0.92 : 40063a: mov %rax,0x200b2f(%rip) # 601170 <acc>
0.92 : 400641: mov -0x10(%rbp),%rax # +43.87%
2.30 : 400645: mov %rax,%rdi
0.00 : 400648: callq 400526 <lfsr> # -100.00% (p:100.00%)
0.00 : 40064d: mov %rax,-0x10(%rbp) # +100.00%
1.84 : 400651: addq $0x1,-0x8(%rbp)
0.92 : 400656: mov -0x8(%rbp),%rax
5.07 : 40065a: cmp -0x20(%rbp),%rax
0.00 : 40065e: jb 40059f <branches+0x25> # -100.00% (p:100.00%)
0.00 : 400664: nop
0.00 : 400665: leaveq
0.00 : 400666: retq
(Note: the --branch-filter u,any was used to avoid spurious target and
branch points due to interrupts/faults, they show up as very small -/+
annotations on 'weird' locations)
Committer note:
Please take a look at:
http://vger.kernel.org/~acme/perf/annotate_basic_blocks.png
To see the colors.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Cc: David Carrillo-Cisneros <davidcc@google.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Stephane Eranian <eranian@google.com>
[ Moved sym->max_coverage to 'struct annotate', aka symbol__annotate(sym) ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-09-06 03:08:12 +08:00
|
|
|
/*
|
|
|
|
|
* XXX filtered samples can still have branch entires pointing into our
|
|
|
|
|
* symbol and are missed.
|
|
|
|
|
*/
|
|
|
|
|
process_branch_stack(sample->branch_stack, al, sample);
|
|
|
|
|
|
2018-03-16 10:44:34 +08:00
|
|
|
if (ann->has_br_stack && has_annotation(ann))
|
perf annotate: Support to display the IPC/Cycle in TUI mode
Unlike the perf report interactive annotate mode, the perf annotate
doesn't display the IPC/Cycle even if branch info is recorded in perf
data file.
perf record -b ...
perf annotate function
It should show IPC/cycle, but it doesn't.
This patch lets perf annotate support the displaying of IPC/Cycle if
branch info is in perf data.
For example,
perf annotate compute_flag
Percent│ IPC Cycle
│
│
│ Disassembly of section .text:
│
│ 0000000000400640 <compute_flag>:
│ compute_flag():
│ volatile int count;
│ static unsigned int s_randseed;
│
│ __attribute__((noinline))
│ int compute_flag()
│ {
22.96 │1.18 584 sub $0x8,%rsp
│ int i;
│
│ i = rand() % 2;
23.02 │1.18 1 → callq rand@plt
│
│ return i;
27.05 │3.37 mov %eax,%edx
│ }
│3.37 add $0x8,%rsp
│ {
│ int i;
│
│ i = rand() % 2;
│
│ return i;
│3.37 shr $0x1f,%edx
│3.37 add %edx,%eax
│3.37 and $0x1,%eax
│3.37 sub %edx,%eax
│ }
26.97 │3.37 2 ← retq
Note that, this patch only supports TUI mode. For stdio, now it just keeps
original behavior. Will support it in a follow-up patch.
$ perf annotate compute_flag --stdio
Percent | Source code & Disassembly of div for cycles:ppp (7993 samples)
------------------------------------------------------------------------------
:
:
:
: Disassembly of section .text:
:
: 0000000000400640 <compute_flag>:
: compute_flag():
: volatile int count;
: static unsigned int s_randseed;
:
: __attribute__((noinline))
: int compute_flag()
: {
0.29 : 400640: sub $0x8,%rsp # +100.00%
: int i;
:
: i = rand() % 2;
42.93 : 400644: callq 400490 <rand@plt> # -100.00% (p:100.00%)
:
: return i;
0.10 : 400649: mov %eax,%edx # +100.00%
: }
0.94 : 40064b: add $0x8,%rsp
: {
: int i;
:
: i = rand() % 2;
:
: return i;
27.02 : 40064f: shr $0x1f,%edx
0.15 : 400652: add %edx,%eax
1.24 : 400654: and $0x1,%eax
2.08 : 400657: sub %edx,%eax
: }
25.26 : 400659: retq # -100.00% (p:100.00%)
Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
Acked-by: Andi Kleen <ak@linux.intel.com>
Link: http://lkml.kernel.org/r/20180223170210.GC7045@tassilo.jf.intel.com
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1519724327-7773-1-git-send-email-yao.jin@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2018-02-27 17:38:47 +08:00
|
|
|
return process_branch_callback(evsel, sample, al, ann, machine);
|
|
|
|
|
|
2016-06-15 02:19:21 +08:00
|
|
|
he = hists__add_entry(hists, al, NULL, NULL, NULL, sample, true);
|
2009-10-03 21:42:45 +08:00
|
|
|
if (he == NULL)
|
2009-06-06 21:19:13 +08:00
|
|
|
return -ENOMEM;
|
2010-02-25 23:57:40 +08:00
|
|
|
|
2018-05-24 23:05:39 +08:00
|
|
|
ret = hist_entry__inc_addr_samples(he, sample, evsel, al->addr);
|
2014-10-10 00:13:41 +08:00
|
|
|
hists__inc_nr_samples(hists, true);
|
2011-03-06 08:40:06 +08:00
|
|
|
return ret;
|
2009-06-06 21:19:13 +08:00
|
|
|
}
|
|
|
|
|
|
2011-11-28 18:30:20 +08:00
|
|
|
static int process_sample_event(struct perf_tool *tool,
|
2011-11-25 18:19:45 +08:00
|
|
|
union perf_event *event,
|
2011-01-30 00:01:45 +08:00
|
|
|
struct perf_sample *sample,
|
2011-03-16 02:44:01 +08:00
|
|
|
struct perf_evsel *evsel,
|
2011-11-28 17:56:39 +08:00
|
|
|
struct machine *machine)
|
2009-06-06 21:19:13 +08:00
|
|
|
{
|
2011-11-28 18:30:20 +08:00
|
|
|
struct perf_annotate *ann = container_of(tool, struct perf_annotate, tool);
|
perf tools: Consolidate symbol resolving across all tools
Now we have a very high level routine for simple tools to
process IP sample events:
int event__preprocess_sample(const event_t *self,
struct addr_location *al,
symbol_filter_t filter)
It receives the event itself and will insert new threads in the
global threads list and resolve the map and symbol, filling all
this info into the new addr_location struct, so that tools like
annotate and report can further process the event by creating
hist_entries in their specific way (with or without callgraphs,
etc).
It in turn uses the new next layer function:
void thread__find_addr_location(struct thread *self, u8 cpumode,
enum map_type type, u64 addr,
struct addr_location *al,
symbol_filter_t filter)
This one will, given a thread (userspace or the kernel kthread
one), will find the given type (MAP__FUNCTION now, MAP__VARIABLE
too in the near future) at the given cpumode, taking vdsos into
account (userspace hit, but kernel symbol) and will fill all
these details in the addr_location given.
Tools that need a more compact API for plain function
resolution, like 'kmem', can use this other one:
struct symbol *thread__find_function(struct thread *self, u64 addr,
symbol_filter_t filter)
So, to resolve a kernel symbol, that is all the 'kmem' tool
needs, its just a matter of calling:
sym = thread__find_function(kthread, addr, NULL);
The 'filter' parameter is needed because we do lazy
parsing/loading of ELF symtabs or /proc/kallsyms.
With this we remove more code duplication all around, which is
always good, huh? :-)
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: John Kacur <jkacur@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
LKML-Reference: <1259346563-12568-12-git-send-email-acme@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-11-28 02:29:23 +08:00
|
|
|
struct addr_location al;
|
perf machine: Protect the machine->threads with a rwlock
In addition to using refcounts for the struct thread lifetime
management, we need to protect access to machine->threads from
concurrent access.
That happens in 'perf top', where a thread processes events, inserting
and deleting entries from that rb_tree while another thread decays
hist_entries, that end up dropping references and ultimately deleting
threads from the rb_tree and releasing its resources when no further
hist_entry (or other data structures, like in 'perf sched') references
it.
So the rule is the same for refcounts + protected trees in the kernel,
get the tree lock, find object, bump the refcount, drop the tree lock,
return, use object, drop the refcount if no more use of it is needed,
keep it if storing it in some other data structure, drop when releasing
that data structure.
I.e. pair "t = machine__find(new)_thread()" with a "thread__put(t)", and
"perf_event__preprocess_sample(&al)" with "addr_location__put(&al)".
The addr_location__put() one is because as we return references to
several data structures, we may end up adding more reference counting
for the other data structures and then we'll drop it at
addr_location__put() time.
Acked-by: David Ahern <dsahern@gmail.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: Don Zickus <dzickus@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-bs9rt4n0jw3hi9f3zxyy3xln@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-04-07 07:43:22 +08:00
|
|
|
int ret = 0;
|
2009-08-14 18:21:53 +08:00
|
|
|
|
2016-03-23 05:39:09 +08:00
|
|
|
if (machine__resolve(machine, &al, sample) < 0) {
|
2010-02-04 02:52:06 +08:00
|
|
|
pr_warning("problem processing %d event, skipping it.\n",
|
|
|
|
|
event->header.type);
|
2009-06-06 21:19:13 +08:00
|
|
|
return -1;
|
|
|
|
|
}
|
|
|
|
|
|
2011-11-17 22:33:21 +08:00
|
|
|
if (ann->cpu_list && !test_bit(sample->cpu, ann->cpu_bitmap))
|
perf machine: Protect the machine->threads with a rwlock
In addition to using refcounts for the struct thread lifetime
management, we need to protect access to machine->threads from
concurrent access.
That happens in 'perf top', where a thread processes events, inserting
and deleting entries from that rb_tree while another thread decays
hist_entries, that end up dropping references and ultimately deleting
threads from the rb_tree and releasing its resources when no further
hist_entry (or other data structures, like in 'perf sched') references
it.
So the rule is the same for refcounts + protected trees in the kernel,
get the tree lock, find object, bump the refcount, drop the tree lock,
return, use object, drop the refcount if no more use of it is needed,
keep it if storing it in some other data structure, drop when releasing
that data structure.
I.e. pair "t = machine__find(new)_thread()" with a "thread__put(t)", and
"perf_event__preprocess_sample(&al)" with "addr_location__put(&al)".
The addr_location__put() one is because as we return references to
several data structures, we may end up adding more reference counting
for the other data structures and then we'll drop it at
addr_location__put() time.
Acked-by: David Ahern <dsahern@gmail.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: Don Zickus <dzickus@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-bs9rt4n0jw3hi9f3zxyy3xln@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-04-07 07:43:22 +08:00
|
|
|
goto out_put;
|
2011-07-04 19:57:50 +08:00
|
|
|
|
perf annotate: Support to display the IPC/Cycle in TUI mode
Unlike the perf report interactive annotate mode, the perf annotate
doesn't display the IPC/Cycle even if branch info is recorded in perf
data file.
perf record -b ...
perf annotate function
It should show IPC/cycle, but it doesn't.
This patch lets perf annotate support the displaying of IPC/Cycle if
branch info is in perf data.
For example,
perf annotate compute_flag
Percent│ IPC Cycle
│
│
│ Disassembly of section .text:
│
│ 0000000000400640 <compute_flag>:
│ compute_flag():
│ volatile int count;
│ static unsigned int s_randseed;
│
│ __attribute__((noinline))
│ int compute_flag()
│ {
22.96 │1.18 584 sub $0x8,%rsp
│ int i;
│
│ i = rand() % 2;
23.02 │1.18 1 → callq rand@plt
│
│ return i;
27.05 │3.37 mov %eax,%edx
│ }
│3.37 add $0x8,%rsp
│ {
│ int i;
│
│ i = rand() % 2;
│
│ return i;
│3.37 shr $0x1f,%edx
│3.37 add %edx,%eax
│3.37 and $0x1,%eax
│3.37 sub %edx,%eax
│ }
26.97 │3.37 2 ← retq
Note that, this patch only supports TUI mode. For stdio, now it just keeps
original behavior. Will support it in a follow-up patch.
$ perf annotate compute_flag --stdio
Percent | Source code & Disassembly of div for cycles:ppp (7993 samples)
------------------------------------------------------------------------------
:
:
:
: Disassembly of section .text:
:
: 0000000000400640 <compute_flag>:
: compute_flag():
: volatile int count;
: static unsigned int s_randseed;
:
: __attribute__((noinline))
: int compute_flag()
: {
0.29 : 400640: sub $0x8,%rsp # +100.00%
: int i;
:
: i = rand() % 2;
42.93 : 400644: callq 400490 <rand@plt> # -100.00% (p:100.00%)
:
: return i;
0.10 : 400649: mov %eax,%edx # +100.00%
: }
0.94 : 40064b: add $0x8,%rsp
: {
: int i;
:
: i = rand() % 2;
:
: return i;
27.02 : 40064f: shr $0x1f,%edx
0.15 : 400652: add %edx,%eax
1.24 : 400654: and $0x1,%eax
2.08 : 400657: sub %edx,%eax
: }
25.26 : 400659: retq # -100.00% (p:100.00%)
Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
Acked-by: Andi Kleen <ak@linux.intel.com>
Link: http://lkml.kernel.org/r/20180223170210.GC7045@tassilo.jf.intel.com
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1519724327-7773-1-git-send-email-yao.jin@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2018-02-27 17:38:47 +08:00
|
|
|
if (!al.filtered &&
|
|
|
|
|
perf_evsel__add_sample(evsel, sample, &al, ann, machine)) {
|
2010-02-04 02:52:06 +08:00
|
|
|
pr_warning("problem incrementing symbol count, "
|
|
|
|
|
"skipping event\n");
|
perf machine: Protect the machine->threads with a rwlock
In addition to using refcounts for the struct thread lifetime
management, we need to protect access to machine->threads from
concurrent access.
That happens in 'perf top', where a thread processes events, inserting
and deleting entries from that rb_tree while another thread decays
hist_entries, that end up dropping references and ultimately deleting
threads from the rb_tree and releasing its resources when no further
hist_entry (or other data structures, like in 'perf sched') references
it.
So the rule is the same for refcounts + protected trees in the kernel,
get the tree lock, find object, bump the refcount, drop the tree lock,
return, use object, drop the refcount if no more use of it is needed,
keep it if storing it in some other data structure, drop when releasing
that data structure.
I.e. pair "t = machine__find(new)_thread()" with a "thread__put(t)", and
"perf_event__preprocess_sample(&al)" with "addr_location__put(&al)".
The addr_location__put() one is because as we return references to
several data structures, we may end up adding more reference counting
for the other data structures and then we'll drop it at
addr_location__put() time.
Acked-by: David Ahern <dsahern@gmail.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: Don Zickus <dzickus@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-bs9rt4n0jw3hi9f3zxyy3xln@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-04-07 07:43:22 +08:00
|
|
|
ret = -1;
|
2009-06-06 21:19:13 +08:00
|
|
|
}
|
perf machine: Protect the machine->threads with a rwlock
In addition to using refcounts for the struct thread lifetime
management, we need to protect access to machine->threads from
concurrent access.
That happens in 'perf top', where a thread processes events, inserting
and deleting entries from that rb_tree while another thread decays
hist_entries, that end up dropping references and ultimately deleting
threads from the rb_tree and releasing its resources when no further
hist_entry (or other data structures, like in 'perf sched') references
it.
So the rule is the same for refcounts + protected trees in the kernel,
get the tree lock, find object, bump the refcount, drop the tree lock,
return, use object, drop the refcount if no more use of it is needed,
keep it if storing it in some other data structure, drop when releasing
that data structure.
I.e. pair "t = machine__find(new)_thread()" with a "thread__put(t)", and
"perf_event__preprocess_sample(&al)" with "addr_location__put(&al)".
The addr_location__put() one is because as we return references to
several data structures, we may end up adding more reference counting
for the other data structures and then we'll drop it at
addr_location__put() time.
Acked-by: David Ahern <dsahern@gmail.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: Don Zickus <dzickus@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-bs9rt4n0jw3hi9f3zxyy3xln@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-04-07 07:43:22 +08:00
|
|
|
out_put:
|
|
|
|
|
addr_location__put(&al);
|
|
|
|
|
return ret;
|
2009-06-06 21:19:13 +08:00
|
|
|
}
|
|
|
|
|
|
2018-09-13 20:54:03 +08:00
|
|
|
static int process_feature_event(struct perf_session *session,
|
|
|
|
|
union perf_event *event)
|
2018-06-25 20:42:20 +08:00
|
|
|
{
|
|
|
|
|
if (event->feat.feat_id < HEADER_LAST_FEATURE)
|
2018-09-13 20:54:03 +08:00
|
|
|
return perf_event__process_feature(session, event);
|
2018-06-25 20:42:20 +08:00
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
2013-03-05 13:53:21 +08:00
|
|
|
static int hist_entry__tty_annotate(struct hist_entry *he,
|
|
|
|
|
struct perf_evsel *evsel,
|
2011-11-25 18:19:45 +08:00
|
|
|
struct perf_annotate *ann)
|
perf_counter tools: Add 'perf annotate' feature
Add new perf sub-command to display annotated source code:
$ perf annotate decode_tree_entry
------------------------------------------------
Percent | Source code & Disassembly of /home/mingo/git/git
------------------------------------------------
:
: /home/mingo/git/git: file format elf64-x86-64
:
:
: Disassembly of section .text:
:
: 00000000004a0da0 <decode_tree_entry>:
: *modep = mode;
: return str;
: }
:
: static void decode_tree_entry(struct tree_desc *desc, const char *buf, unsigned long size)
: {
3.82 : 4a0da0: 41 54 push %r12
: const char *path;
: unsigned int mode, len;
:
: if (size < 24 || buf[size - 21])
0.17 : 4a0da2: 48 83 fa 17 cmp $0x17,%rdx
: *modep = mode;
: return str;
: }
:
: static void decode_tree_entry(struct tree_desc *desc, const char *buf, unsigned long size)
: {
0.00 : 4a0da6: 49 89 fc mov %rdi,%r12
0.00 : 4a0da9: 55 push %rbp
3.37 : 4a0daa: 53 push %rbx
: const char *path;
: unsigned int mode, len;
:
: if (size < 24 || buf[size - 21])
0.08 : 4a0dab: 76 73 jbe 4a0e20 <decode_tree_entry+0x80>
0.00 : 4a0dad: 80 7c 16 eb 00 cmpb $0x0,-0x15(%rsi,%rdx,1)
3.48 : 4a0db2: 75 6c jne 4a0e20 <decode_tree_entry+0x80>
: static const char *get_mode(const char *str, unsigned int *modep)
: {
: unsigned char c;
: unsigned int mode = 0;
:
: if (*str == ' ')
1.94 : 4a0db4: 0f b6 06 movzbl (%rsi),%eax
0.39 : 4a0db7: 3c 20 cmp $0x20,%al
0.00 : 4a0db9: 74 65 je 4a0e20 <decode_tree_entry+0x80>
: return NULL;
:
: while ((c = *str++) != ' ') {
0.06 : 4a0dbb: 89 c2 mov %eax,%edx
: if (c < '0' || c > '7')
1.99 : 4a0dbd: 31 ed xor %ebp,%ebp
: unsigned int mode = 0;
:
: if (*str == ' ')
: return NULL;
:
: while ((c = *str++) != ' ') {
1.74 : 4a0dbf: 48 8d 5e 01 lea 0x1(%rsi),%rbx
: if (c < '0' || c > '7')
0.00 : 4a0dc3: 8d 42 d0 lea -0x30(%rdx),%eax
0.17 : 4a0dc6: 3c 07 cmp $0x7,%al
0.00 : 4a0dc8: 76 0d jbe 4a0dd7 <decode_tree_entry+0x37>
0.00 : 4a0dca: eb 54 jmp 4a0e20 <decode_tree_entry+0x80>
0.00 : 4a0dcc: 0f 1f 40 00 nopl 0x0(%rax)
16.57 : 4a0dd0: 8d 42 d0 lea -0x30(%rdx),%eax
0.14 : 4a0dd3: 3c 07 cmp $0x7,%al
0.00 : 4a0dd5: 77 49 ja 4a0e20 <decode_tree_entry+0x80>
: return NULL;
: mode = (mode << 3) + (c - '0');
3.12 : 4a0dd7: 0f b6 c2 movzbl %dl,%eax
: unsigned int mode = 0;
:
: if (*str == ' ')
: return NULL;
:
: while ((c = *str++) != ' ') {
0.00 : 4a0dda: 0f b6 13 movzbl (%rbx),%edx
16.74 : 4a0ddd: 48 83 c3 01 add $0x1,%rbx
: if (c < '0' || c > '7')
: return NULL;
: mode = (mode << 3) + (c - '0');
The first column is the percentage of samples that arrived on that
particular line - relative to the total cost of the function.
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-06-06 21:48:52 +08:00
|
|
|
{
|
2018-03-16 10:44:34 +08:00
|
|
|
if (!ann->use_stdio2)
|
2018-05-26 04:28:37 +08:00
|
|
|
return symbol__tty_annotate(he->ms.sym, he->ms.map, evsel, &ann->opts);
|
|
|
|
|
|
|
|
|
|
return symbol__tty_annotate2(he->ms.sym, he->ms.map, evsel, &ann->opts);
|
perf_counter tools: Add 'perf annotate' feature
Add new perf sub-command to display annotated source code:
$ perf annotate decode_tree_entry
------------------------------------------------
Percent | Source code & Disassembly of /home/mingo/git/git
------------------------------------------------
:
: /home/mingo/git/git: file format elf64-x86-64
:
:
: Disassembly of section .text:
:
: 00000000004a0da0 <decode_tree_entry>:
: *modep = mode;
: return str;
: }
:
: static void decode_tree_entry(struct tree_desc *desc, const char *buf, unsigned long size)
: {
3.82 : 4a0da0: 41 54 push %r12
: const char *path;
: unsigned int mode, len;
:
: if (size < 24 || buf[size - 21])
0.17 : 4a0da2: 48 83 fa 17 cmp $0x17,%rdx
: *modep = mode;
: return str;
: }
:
: static void decode_tree_entry(struct tree_desc *desc, const char *buf, unsigned long size)
: {
0.00 : 4a0da6: 49 89 fc mov %rdi,%r12
0.00 : 4a0da9: 55 push %rbp
3.37 : 4a0daa: 53 push %rbx
: const char *path;
: unsigned int mode, len;
:
: if (size < 24 || buf[size - 21])
0.08 : 4a0dab: 76 73 jbe 4a0e20 <decode_tree_entry+0x80>
0.00 : 4a0dad: 80 7c 16 eb 00 cmpb $0x0,-0x15(%rsi,%rdx,1)
3.48 : 4a0db2: 75 6c jne 4a0e20 <decode_tree_entry+0x80>
: static const char *get_mode(const char *str, unsigned int *modep)
: {
: unsigned char c;
: unsigned int mode = 0;
:
: if (*str == ' ')
1.94 : 4a0db4: 0f b6 06 movzbl (%rsi),%eax
0.39 : 4a0db7: 3c 20 cmp $0x20,%al
0.00 : 4a0db9: 74 65 je 4a0e20 <decode_tree_entry+0x80>
: return NULL;
:
: while ((c = *str++) != ' ') {
0.06 : 4a0dbb: 89 c2 mov %eax,%edx
: if (c < '0' || c > '7')
1.99 : 4a0dbd: 31 ed xor %ebp,%ebp
: unsigned int mode = 0;
:
: if (*str == ' ')
: return NULL;
:
: while ((c = *str++) != ' ') {
1.74 : 4a0dbf: 48 8d 5e 01 lea 0x1(%rsi),%rbx
: if (c < '0' || c > '7')
0.00 : 4a0dc3: 8d 42 d0 lea -0x30(%rdx),%eax
0.17 : 4a0dc6: 3c 07 cmp $0x7,%al
0.00 : 4a0dc8: 76 0d jbe 4a0dd7 <decode_tree_entry+0x37>
0.00 : 4a0dca: eb 54 jmp 4a0e20 <decode_tree_entry+0x80>
0.00 : 4a0dcc: 0f 1f 40 00 nopl 0x0(%rax)
16.57 : 4a0dd0: 8d 42 d0 lea -0x30(%rdx),%eax
0.14 : 4a0dd3: 3c 07 cmp $0x7,%al
0.00 : 4a0dd5: 77 49 ja 4a0e20 <decode_tree_entry+0x80>
: return NULL;
: mode = (mode << 3) + (c - '0');
3.12 : 4a0dd7: 0f b6 c2 movzbl %dl,%eax
: unsigned int mode = 0;
:
: if (*str == ' ')
: return NULL;
:
: while ((c = *str++) != ' ') {
0.00 : 4a0dda: 0f b6 13 movzbl (%rbx),%edx
16.74 : 4a0ddd: 48 83 c3 01 add $0x1,%rbx
: if (c < '0' || c > '7')
: return NULL;
: mode = (mode << 3) + (c - '0');
The first column is the percentage of samples that arrived on that
particular line - relative to the total cost of the function.
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-06-06 21:48:52 +08:00
|
|
|
}
|
|
|
|
|
|
2013-10-23 06:01:31 +08:00
|
|
|
static void hists__find_annotations(struct hists *hists,
|
2013-03-05 13:53:21 +08:00
|
|
|
struct perf_evsel *evsel,
|
2011-11-25 18:19:45 +08:00
|
|
|
struct perf_annotate *ann)
|
perf_counter tools: Add 'perf annotate' feature
Add new perf sub-command to display annotated source code:
$ perf annotate decode_tree_entry
------------------------------------------------
Percent | Source code & Disassembly of /home/mingo/git/git
------------------------------------------------
:
: /home/mingo/git/git: file format elf64-x86-64
:
:
: Disassembly of section .text:
:
: 00000000004a0da0 <decode_tree_entry>:
: *modep = mode;
: return str;
: }
:
: static void decode_tree_entry(struct tree_desc *desc, const char *buf, unsigned long size)
: {
3.82 : 4a0da0: 41 54 push %r12
: const char *path;
: unsigned int mode, len;
:
: if (size < 24 || buf[size - 21])
0.17 : 4a0da2: 48 83 fa 17 cmp $0x17,%rdx
: *modep = mode;
: return str;
: }
:
: static void decode_tree_entry(struct tree_desc *desc, const char *buf, unsigned long size)
: {
0.00 : 4a0da6: 49 89 fc mov %rdi,%r12
0.00 : 4a0da9: 55 push %rbp
3.37 : 4a0daa: 53 push %rbx
: const char *path;
: unsigned int mode, len;
:
: if (size < 24 || buf[size - 21])
0.08 : 4a0dab: 76 73 jbe 4a0e20 <decode_tree_entry+0x80>
0.00 : 4a0dad: 80 7c 16 eb 00 cmpb $0x0,-0x15(%rsi,%rdx,1)
3.48 : 4a0db2: 75 6c jne 4a0e20 <decode_tree_entry+0x80>
: static const char *get_mode(const char *str, unsigned int *modep)
: {
: unsigned char c;
: unsigned int mode = 0;
:
: if (*str == ' ')
1.94 : 4a0db4: 0f b6 06 movzbl (%rsi),%eax
0.39 : 4a0db7: 3c 20 cmp $0x20,%al
0.00 : 4a0db9: 74 65 je 4a0e20 <decode_tree_entry+0x80>
: return NULL;
:
: while ((c = *str++) != ' ') {
0.06 : 4a0dbb: 89 c2 mov %eax,%edx
: if (c < '0' || c > '7')
1.99 : 4a0dbd: 31 ed xor %ebp,%ebp
: unsigned int mode = 0;
:
: if (*str == ' ')
: return NULL;
:
: while ((c = *str++) != ' ') {
1.74 : 4a0dbf: 48 8d 5e 01 lea 0x1(%rsi),%rbx
: if (c < '0' || c > '7')
0.00 : 4a0dc3: 8d 42 d0 lea -0x30(%rdx),%eax
0.17 : 4a0dc6: 3c 07 cmp $0x7,%al
0.00 : 4a0dc8: 76 0d jbe 4a0dd7 <decode_tree_entry+0x37>
0.00 : 4a0dca: eb 54 jmp 4a0e20 <decode_tree_entry+0x80>
0.00 : 4a0dcc: 0f 1f 40 00 nopl 0x0(%rax)
16.57 : 4a0dd0: 8d 42 d0 lea -0x30(%rdx),%eax
0.14 : 4a0dd3: 3c 07 cmp $0x7,%al
0.00 : 4a0dd5: 77 49 ja 4a0e20 <decode_tree_entry+0x80>
: return NULL;
: mode = (mode << 3) + (c - '0');
3.12 : 4a0dd7: 0f b6 c2 movzbl %dl,%eax
: unsigned int mode = 0;
:
: if (*str == ' ')
: return NULL;
:
: while ((c = *str++) != ' ') {
0.00 : 4a0dda: 0f b6 13 movzbl (%rbx),%edx
16.74 : 4a0ddd: 48 83 c3 01 add $0x1,%rbx
: if (c < '0' || c > '7')
: return NULL;
: mode = (mode << 3) + (c - '0');
The first column is the percentage of samples that arrived on that
particular line - relative to the total cost of the function.
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-06-06 21:48:52 +08:00
|
|
|
{
|
2018-12-07 03:18:18 +08:00
|
|
|
struct rb_node *nd = rb_first_cached(&hists->entries), *next;
|
2011-10-21 02:59:15 +08:00
|
|
|
int key = K_RIGHT;
|
perf_counter tools: Add 'perf annotate' feature
Add new perf sub-command to display annotated source code:
$ perf annotate decode_tree_entry
------------------------------------------------
Percent | Source code & Disassembly of /home/mingo/git/git
------------------------------------------------
:
: /home/mingo/git/git: file format elf64-x86-64
:
:
: Disassembly of section .text:
:
: 00000000004a0da0 <decode_tree_entry>:
: *modep = mode;
: return str;
: }
:
: static void decode_tree_entry(struct tree_desc *desc, const char *buf, unsigned long size)
: {
3.82 : 4a0da0: 41 54 push %r12
: const char *path;
: unsigned int mode, len;
:
: if (size < 24 || buf[size - 21])
0.17 : 4a0da2: 48 83 fa 17 cmp $0x17,%rdx
: *modep = mode;
: return str;
: }
:
: static void decode_tree_entry(struct tree_desc *desc, const char *buf, unsigned long size)
: {
0.00 : 4a0da6: 49 89 fc mov %rdi,%r12
0.00 : 4a0da9: 55 push %rbp
3.37 : 4a0daa: 53 push %rbx
: const char *path;
: unsigned int mode, len;
:
: if (size < 24 || buf[size - 21])
0.08 : 4a0dab: 76 73 jbe 4a0e20 <decode_tree_entry+0x80>
0.00 : 4a0dad: 80 7c 16 eb 00 cmpb $0x0,-0x15(%rsi,%rdx,1)
3.48 : 4a0db2: 75 6c jne 4a0e20 <decode_tree_entry+0x80>
: static const char *get_mode(const char *str, unsigned int *modep)
: {
: unsigned char c;
: unsigned int mode = 0;
:
: if (*str == ' ')
1.94 : 4a0db4: 0f b6 06 movzbl (%rsi),%eax
0.39 : 4a0db7: 3c 20 cmp $0x20,%al
0.00 : 4a0db9: 74 65 je 4a0e20 <decode_tree_entry+0x80>
: return NULL;
:
: while ((c = *str++) != ' ') {
0.06 : 4a0dbb: 89 c2 mov %eax,%edx
: if (c < '0' || c > '7')
1.99 : 4a0dbd: 31 ed xor %ebp,%ebp
: unsigned int mode = 0;
:
: if (*str == ' ')
: return NULL;
:
: while ((c = *str++) != ' ') {
1.74 : 4a0dbf: 48 8d 5e 01 lea 0x1(%rsi),%rbx
: if (c < '0' || c > '7')
0.00 : 4a0dc3: 8d 42 d0 lea -0x30(%rdx),%eax
0.17 : 4a0dc6: 3c 07 cmp $0x7,%al
0.00 : 4a0dc8: 76 0d jbe 4a0dd7 <decode_tree_entry+0x37>
0.00 : 4a0dca: eb 54 jmp 4a0e20 <decode_tree_entry+0x80>
0.00 : 4a0dcc: 0f 1f 40 00 nopl 0x0(%rax)
16.57 : 4a0dd0: 8d 42 d0 lea -0x30(%rdx),%eax
0.14 : 4a0dd3: 3c 07 cmp $0x7,%al
0.00 : 4a0dd5: 77 49 ja 4a0e20 <decode_tree_entry+0x80>
: return NULL;
: mode = (mode << 3) + (c - '0');
3.12 : 4a0dd7: 0f b6 c2 movzbl %dl,%eax
: unsigned int mode = 0;
:
: if (*str == ' ')
: return NULL;
:
: while ((c = *str++) != ' ') {
0.00 : 4a0dda: 0f b6 13 movzbl (%rbx),%edx
16.74 : 4a0ddd: 48 83 c3 01 add $0x1,%rbx
: if (c < '0' || c > '7')
: return NULL;
: mode = (mode << 3) + (c - '0');
The first column is the percentage of samples that arrived on that
particular line - relative to the total cost of the function.
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-06-06 21:48:52 +08:00
|
|
|
|
2010-05-22 22:25:40 +08:00
|
|
|
while (nd) {
|
2009-10-20 03:17:57 +08:00
|
|
|
struct hist_entry *he = rb_entry(nd, struct hist_entry, rb_node);
|
2011-02-04 19:45:46 +08:00
|
|
|
struct annotation *notes;
|
perf_counter tools: Add 'perf annotate' feature
Add new perf sub-command to display annotated source code:
$ perf annotate decode_tree_entry
------------------------------------------------
Percent | Source code & Disassembly of /home/mingo/git/git
------------------------------------------------
:
: /home/mingo/git/git: file format elf64-x86-64
:
:
: Disassembly of section .text:
:
: 00000000004a0da0 <decode_tree_entry>:
: *modep = mode;
: return str;
: }
:
: static void decode_tree_entry(struct tree_desc *desc, const char *buf, unsigned long size)
: {
3.82 : 4a0da0: 41 54 push %r12
: const char *path;
: unsigned int mode, len;
:
: if (size < 24 || buf[size - 21])
0.17 : 4a0da2: 48 83 fa 17 cmp $0x17,%rdx
: *modep = mode;
: return str;
: }
:
: static void decode_tree_entry(struct tree_desc *desc, const char *buf, unsigned long size)
: {
0.00 : 4a0da6: 49 89 fc mov %rdi,%r12
0.00 : 4a0da9: 55 push %rbp
3.37 : 4a0daa: 53 push %rbx
: const char *path;
: unsigned int mode, len;
:
: if (size < 24 || buf[size - 21])
0.08 : 4a0dab: 76 73 jbe 4a0e20 <decode_tree_entry+0x80>
0.00 : 4a0dad: 80 7c 16 eb 00 cmpb $0x0,-0x15(%rsi,%rdx,1)
3.48 : 4a0db2: 75 6c jne 4a0e20 <decode_tree_entry+0x80>
: static const char *get_mode(const char *str, unsigned int *modep)
: {
: unsigned char c;
: unsigned int mode = 0;
:
: if (*str == ' ')
1.94 : 4a0db4: 0f b6 06 movzbl (%rsi),%eax
0.39 : 4a0db7: 3c 20 cmp $0x20,%al
0.00 : 4a0db9: 74 65 je 4a0e20 <decode_tree_entry+0x80>
: return NULL;
:
: while ((c = *str++) != ' ') {
0.06 : 4a0dbb: 89 c2 mov %eax,%edx
: if (c < '0' || c > '7')
1.99 : 4a0dbd: 31 ed xor %ebp,%ebp
: unsigned int mode = 0;
:
: if (*str == ' ')
: return NULL;
:
: while ((c = *str++) != ' ') {
1.74 : 4a0dbf: 48 8d 5e 01 lea 0x1(%rsi),%rbx
: if (c < '0' || c > '7')
0.00 : 4a0dc3: 8d 42 d0 lea -0x30(%rdx),%eax
0.17 : 4a0dc6: 3c 07 cmp $0x7,%al
0.00 : 4a0dc8: 76 0d jbe 4a0dd7 <decode_tree_entry+0x37>
0.00 : 4a0dca: eb 54 jmp 4a0e20 <decode_tree_entry+0x80>
0.00 : 4a0dcc: 0f 1f 40 00 nopl 0x0(%rax)
16.57 : 4a0dd0: 8d 42 d0 lea -0x30(%rdx),%eax
0.14 : 4a0dd3: 3c 07 cmp $0x7,%al
0.00 : 4a0dd5: 77 49 ja 4a0e20 <decode_tree_entry+0x80>
: return NULL;
: mode = (mode << 3) + (c - '0');
3.12 : 4a0dd7: 0f b6 c2 movzbl %dl,%eax
: unsigned int mode = 0;
:
: if (*str == ' ')
: return NULL;
:
: while ((c = *str++) != ' ') {
0.00 : 4a0dda: 0f b6 13 movzbl (%rbx),%edx
16.74 : 4a0ddd: 48 83 c3 01 add $0x1,%rbx
: if (c < '0' || c > '7')
: return NULL;
: mode = (mode << 3) + (c - '0');
The first column is the percentage of samples that arrived on that
particular line - relative to the total cost of the function.
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-06-06 21:48:52 +08:00
|
|
|
|
2010-05-22 22:25:40 +08:00
|
|
|
if (he->ms.sym == NULL || he->ms.map->dso->annotate_warned)
|
|
|
|
|
goto find_next;
|
perf_counter tools: Add 'perf annotate' feature
Add new perf sub-command to display annotated source code:
$ perf annotate decode_tree_entry
------------------------------------------------
Percent | Source code & Disassembly of /home/mingo/git/git
------------------------------------------------
:
: /home/mingo/git/git: file format elf64-x86-64
:
:
: Disassembly of section .text:
:
: 00000000004a0da0 <decode_tree_entry>:
: *modep = mode;
: return str;
: }
:
: static void decode_tree_entry(struct tree_desc *desc, const char *buf, unsigned long size)
: {
3.82 : 4a0da0: 41 54 push %r12
: const char *path;
: unsigned int mode, len;
:
: if (size < 24 || buf[size - 21])
0.17 : 4a0da2: 48 83 fa 17 cmp $0x17,%rdx
: *modep = mode;
: return str;
: }
:
: static void decode_tree_entry(struct tree_desc *desc, const char *buf, unsigned long size)
: {
0.00 : 4a0da6: 49 89 fc mov %rdi,%r12
0.00 : 4a0da9: 55 push %rbp
3.37 : 4a0daa: 53 push %rbx
: const char *path;
: unsigned int mode, len;
:
: if (size < 24 || buf[size - 21])
0.08 : 4a0dab: 76 73 jbe 4a0e20 <decode_tree_entry+0x80>
0.00 : 4a0dad: 80 7c 16 eb 00 cmpb $0x0,-0x15(%rsi,%rdx,1)
3.48 : 4a0db2: 75 6c jne 4a0e20 <decode_tree_entry+0x80>
: static const char *get_mode(const char *str, unsigned int *modep)
: {
: unsigned char c;
: unsigned int mode = 0;
:
: if (*str == ' ')
1.94 : 4a0db4: 0f b6 06 movzbl (%rsi),%eax
0.39 : 4a0db7: 3c 20 cmp $0x20,%al
0.00 : 4a0db9: 74 65 je 4a0e20 <decode_tree_entry+0x80>
: return NULL;
:
: while ((c = *str++) != ' ') {
0.06 : 4a0dbb: 89 c2 mov %eax,%edx
: if (c < '0' || c > '7')
1.99 : 4a0dbd: 31 ed xor %ebp,%ebp
: unsigned int mode = 0;
:
: if (*str == ' ')
: return NULL;
:
: while ((c = *str++) != ' ') {
1.74 : 4a0dbf: 48 8d 5e 01 lea 0x1(%rsi),%rbx
: if (c < '0' || c > '7')
0.00 : 4a0dc3: 8d 42 d0 lea -0x30(%rdx),%eax
0.17 : 4a0dc6: 3c 07 cmp $0x7,%al
0.00 : 4a0dc8: 76 0d jbe 4a0dd7 <decode_tree_entry+0x37>
0.00 : 4a0dca: eb 54 jmp 4a0e20 <decode_tree_entry+0x80>
0.00 : 4a0dcc: 0f 1f 40 00 nopl 0x0(%rax)
16.57 : 4a0dd0: 8d 42 d0 lea -0x30(%rdx),%eax
0.14 : 4a0dd3: 3c 07 cmp $0x7,%al
0.00 : 4a0dd5: 77 49 ja 4a0e20 <decode_tree_entry+0x80>
: return NULL;
: mode = (mode << 3) + (c - '0');
3.12 : 4a0dd7: 0f b6 c2 movzbl %dl,%eax
: unsigned int mode = 0;
:
: if (*str == ' ')
: return NULL;
:
: while ((c = *str++) != ' ') {
0.00 : 4a0dda: 0f b6 13 movzbl (%rbx),%edx
16.74 : 4a0ddd: 48 83 c3 01 add $0x1,%rbx
: if (c < '0' || c > '7')
: return NULL;
: mode = (mode << 3) + (c - '0');
The first column is the percentage of samples that arrived on that
particular line - relative to the total cost of the function.
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-06-06 21:48:52 +08:00
|
|
|
|
perf annotate: Support to display the IPC/Cycle in TUI mode
Unlike the perf report interactive annotate mode, the perf annotate
doesn't display the IPC/Cycle even if branch info is recorded in perf
data file.
perf record -b ...
perf annotate function
It should show IPC/cycle, but it doesn't.
This patch lets perf annotate support the displaying of IPC/Cycle if
branch info is in perf data.
For example,
perf annotate compute_flag
Percent│ IPC Cycle
│
│
│ Disassembly of section .text:
│
│ 0000000000400640 <compute_flag>:
│ compute_flag():
│ volatile int count;
│ static unsigned int s_randseed;
│
│ __attribute__((noinline))
│ int compute_flag()
│ {
22.96 │1.18 584 sub $0x8,%rsp
│ int i;
│
│ i = rand() % 2;
23.02 │1.18 1 → callq rand@plt
│
│ return i;
27.05 │3.37 mov %eax,%edx
│ }
│3.37 add $0x8,%rsp
│ {
│ int i;
│
│ i = rand() % 2;
│
│ return i;
│3.37 shr $0x1f,%edx
│3.37 add %edx,%eax
│3.37 and $0x1,%eax
│3.37 sub %edx,%eax
│ }
26.97 │3.37 2 ← retq
Note that, this patch only supports TUI mode. For stdio, now it just keeps
original behavior. Will support it in a follow-up patch.
$ perf annotate compute_flag --stdio
Percent | Source code & Disassembly of div for cycles:ppp (7993 samples)
------------------------------------------------------------------------------
:
:
:
: Disassembly of section .text:
:
: 0000000000400640 <compute_flag>:
: compute_flag():
: volatile int count;
: static unsigned int s_randseed;
:
: __attribute__((noinline))
: int compute_flag()
: {
0.29 : 400640: sub $0x8,%rsp # +100.00%
: int i;
:
: i = rand() % 2;
42.93 : 400644: callq 400490 <rand@plt> # -100.00% (p:100.00%)
:
: return i;
0.10 : 400649: mov %eax,%edx # +100.00%
: }
0.94 : 40064b: add $0x8,%rsp
: {
: int i;
:
: i = rand() % 2;
:
: return i;
27.02 : 40064f: shr $0x1f,%edx
0.15 : 400652: add %edx,%eax
1.24 : 400654: and $0x1,%eax
2.08 : 400657: sub %edx,%eax
: }
25.26 : 400659: retq # -100.00% (p:100.00%)
Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
Acked-by: Andi Kleen <ak@linux.intel.com>
Link: http://lkml.kernel.org/r/20180223170210.GC7045@tassilo.jf.intel.com
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1519724327-7773-1-git-send-email-yao.jin@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2018-02-27 17:38:47 +08:00
|
|
|
if (ann->sym_hist_filter &&
|
|
|
|
|
(strcmp(he->ms.sym->name, ann->sym_hist_filter) != 0))
|
|
|
|
|
goto find_next;
|
|
|
|
|
|
2011-02-04 19:45:46 +08:00
|
|
|
notes = symbol__annotation(he->ms.sym);
|
2011-02-08 23:27:39 +08:00
|
|
|
if (notes->src == NULL) {
|
2010-05-22 22:25:40 +08:00
|
|
|
find_next:
|
2011-10-21 02:59:15 +08:00
|
|
|
if (key == K_LEFT)
|
2010-05-22 22:25:40 +08:00
|
|
|
nd = rb_prev(nd);
|
|
|
|
|
else
|
|
|
|
|
nd = rb_next(nd);
|
2009-10-21 00:25:40 +08:00
|
|
|
continue;
|
2010-05-22 22:25:40 +08:00
|
|
|
}
|
2009-10-21 00:25:40 +08:00
|
|
|
|
2013-02-07 17:02:08 +08:00
|
|
|
if (use_browser == 2) {
|
2013-02-07 17:02:14 +08:00
|
|
|
int ret;
|
2013-09-13 14:27:43 +08:00
|
|
|
int (*annotate)(struct hist_entry *he,
|
|
|
|
|
struct perf_evsel *evsel,
|
|
|
|
|
struct hist_browser_timer *hbt);
|
|
|
|
|
|
|
|
|
|
annotate = dlsym(perf_gtk_handle,
|
|
|
|
|
"hist_entry__gtk_annotate");
|
|
|
|
|
if (annotate == NULL) {
|
|
|
|
|
ui__error("GTK browser not found!\n");
|
|
|
|
|
return;
|
|
|
|
|
}
|
2013-02-07 17:02:14 +08:00
|
|
|
|
2013-09-13 14:27:43 +08:00
|
|
|
ret = annotate(he, evsel, NULL);
|
2013-02-07 17:02:14 +08:00
|
|
|
if (!ret || !ann->skip_missing)
|
|
|
|
|
return;
|
|
|
|
|
|
|
|
|
|
/* skip missing symbols */
|
|
|
|
|
nd = rb_next(nd);
|
2013-02-07 17:02:08 +08:00
|
|
|
} else if (use_browser == 1) {
|
2018-05-29 00:54:59 +08:00
|
|
|
key = hist_entry__tui_annotate(he, evsel, NULL, &ann->opts);
|
perf annotate: Support to display the IPC/Cycle in TUI mode
Unlike the perf report interactive annotate mode, the perf annotate
doesn't display the IPC/Cycle even if branch info is recorded in perf
data file.
perf record -b ...
perf annotate function
It should show IPC/cycle, but it doesn't.
This patch lets perf annotate support the displaying of IPC/Cycle if
branch info is in perf data.
For example,
perf annotate compute_flag
Percent│ IPC Cycle
│
│
│ Disassembly of section .text:
│
│ 0000000000400640 <compute_flag>:
│ compute_flag():
│ volatile int count;
│ static unsigned int s_randseed;
│
│ __attribute__((noinline))
│ int compute_flag()
│ {
22.96 │1.18 584 sub $0x8,%rsp
│ int i;
│
│ i = rand() % 2;
23.02 │1.18 1 → callq rand@plt
│
│ return i;
27.05 │3.37 mov %eax,%edx
│ }
│3.37 add $0x8,%rsp
│ {
│ int i;
│
│ i = rand() % 2;
│
│ return i;
│3.37 shr $0x1f,%edx
│3.37 add %edx,%eax
│3.37 and $0x1,%eax
│3.37 sub %edx,%eax
│ }
26.97 │3.37 2 ← retq
Note that, this patch only supports TUI mode. For stdio, now it just keeps
original behavior. Will support it in a follow-up patch.
$ perf annotate compute_flag --stdio
Percent | Source code & Disassembly of div for cycles:ppp (7993 samples)
------------------------------------------------------------------------------
:
:
:
: Disassembly of section .text:
:
: 0000000000400640 <compute_flag>:
: compute_flag():
: volatile int count;
: static unsigned int s_randseed;
:
: __attribute__((noinline))
: int compute_flag()
: {
0.29 : 400640: sub $0x8,%rsp # +100.00%
: int i;
:
: i = rand() % 2;
42.93 : 400644: callq 400490 <rand@plt> # -100.00% (p:100.00%)
:
: return i;
0.10 : 400649: mov %eax,%edx # +100.00%
: }
0.94 : 40064b: add $0x8,%rsp
: {
: int i;
:
: i = rand() % 2;
:
: return i;
27.02 : 40064f: shr $0x1f,%edx
0.15 : 400652: add %edx,%eax
1.24 : 400654: and $0x1,%eax
2.08 : 400657: sub %edx,%eax
: }
25.26 : 400659: retq # -100.00% (p:100.00%)
Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
Acked-by: Andi Kleen <ak@linux.intel.com>
Link: http://lkml.kernel.org/r/20180223170210.GC7045@tassilo.jf.intel.com
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1519724327-7773-1-git-send-email-yao.jin@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2018-02-27 17:38:47 +08:00
|
|
|
|
2010-05-22 22:25:40 +08:00
|
|
|
switch (key) {
|
2013-02-07 17:02:14 +08:00
|
|
|
case -1:
|
|
|
|
|
if (!ann->skip_missing)
|
|
|
|
|
return;
|
|
|
|
|
/* fall through */
|
2011-10-21 02:59:15 +08:00
|
|
|
case K_RIGHT:
|
2010-08-11 21:07:43 +08:00
|
|
|
next = rb_next(nd);
|
2010-05-22 22:25:40 +08:00
|
|
|
break;
|
2011-10-21 02:59:15 +08:00
|
|
|
case K_LEFT:
|
2010-08-11 21:07:43 +08:00
|
|
|
next = rb_prev(nd);
|
2010-05-22 22:25:40 +08:00
|
|
|
break;
|
2010-08-11 21:07:43 +08:00
|
|
|
default:
|
|
|
|
|
return;
|
2010-05-22 22:25:40 +08:00
|
|
|
}
|
2010-08-11 21:07:43 +08:00
|
|
|
|
|
|
|
|
if (next != NULL)
|
|
|
|
|
nd = next;
|
2010-05-22 22:25:40 +08:00
|
|
|
} else {
|
2013-03-05 13:53:21 +08:00
|
|
|
hist_entry__tty_annotate(he, evsel, ann);
|
2010-05-22 22:25:40 +08:00
|
|
|
nd = rb_next(nd);
|
|
|
|
|
/*
|
|
|
|
|
* Since we have a hist_entry per IP for the same
|
2011-02-08 23:27:39 +08:00
|
|
|
* symbol, free he->ms.sym->src to signal we already
|
2010-05-22 22:25:40 +08:00
|
|
|
* processed this symbol.
|
|
|
|
|
*/
|
2015-07-18 23:24:48 +08:00
|
|
|
zfree(¬es->src->cycles_hist);
|
2013-12-27 04:41:15 +08:00
|
|
|
zfree(¬es->src);
|
2010-05-22 22:25:40 +08:00
|
|
|
}
|
perf_counter tools: Add 'perf annotate' feature
Add new perf sub-command to display annotated source code:
$ perf annotate decode_tree_entry
------------------------------------------------
Percent | Source code & Disassembly of /home/mingo/git/git
------------------------------------------------
:
: /home/mingo/git/git: file format elf64-x86-64
:
:
: Disassembly of section .text:
:
: 00000000004a0da0 <decode_tree_entry>:
: *modep = mode;
: return str;
: }
:
: static void decode_tree_entry(struct tree_desc *desc, const char *buf, unsigned long size)
: {
3.82 : 4a0da0: 41 54 push %r12
: const char *path;
: unsigned int mode, len;
:
: if (size < 24 || buf[size - 21])
0.17 : 4a0da2: 48 83 fa 17 cmp $0x17,%rdx
: *modep = mode;
: return str;
: }
:
: static void decode_tree_entry(struct tree_desc *desc, const char *buf, unsigned long size)
: {
0.00 : 4a0da6: 49 89 fc mov %rdi,%r12
0.00 : 4a0da9: 55 push %rbp
3.37 : 4a0daa: 53 push %rbx
: const char *path;
: unsigned int mode, len;
:
: if (size < 24 || buf[size - 21])
0.08 : 4a0dab: 76 73 jbe 4a0e20 <decode_tree_entry+0x80>
0.00 : 4a0dad: 80 7c 16 eb 00 cmpb $0x0,-0x15(%rsi,%rdx,1)
3.48 : 4a0db2: 75 6c jne 4a0e20 <decode_tree_entry+0x80>
: static const char *get_mode(const char *str, unsigned int *modep)
: {
: unsigned char c;
: unsigned int mode = 0;
:
: if (*str == ' ')
1.94 : 4a0db4: 0f b6 06 movzbl (%rsi),%eax
0.39 : 4a0db7: 3c 20 cmp $0x20,%al
0.00 : 4a0db9: 74 65 je 4a0e20 <decode_tree_entry+0x80>
: return NULL;
:
: while ((c = *str++) != ' ') {
0.06 : 4a0dbb: 89 c2 mov %eax,%edx
: if (c < '0' || c > '7')
1.99 : 4a0dbd: 31 ed xor %ebp,%ebp
: unsigned int mode = 0;
:
: if (*str == ' ')
: return NULL;
:
: while ((c = *str++) != ' ') {
1.74 : 4a0dbf: 48 8d 5e 01 lea 0x1(%rsi),%rbx
: if (c < '0' || c > '7')
0.00 : 4a0dc3: 8d 42 d0 lea -0x30(%rdx),%eax
0.17 : 4a0dc6: 3c 07 cmp $0x7,%al
0.00 : 4a0dc8: 76 0d jbe 4a0dd7 <decode_tree_entry+0x37>
0.00 : 4a0dca: eb 54 jmp 4a0e20 <decode_tree_entry+0x80>
0.00 : 4a0dcc: 0f 1f 40 00 nopl 0x0(%rax)
16.57 : 4a0dd0: 8d 42 d0 lea -0x30(%rdx),%eax
0.14 : 4a0dd3: 3c 07 cmp $0x7,%al
0.00 : 4a0dd5: 77 49 ja 4a0e20 <decode_tree_entry+0x80>
: return NULL;
: mode = (mode << 3) + (c - '0');
3.12 : 4a0dd7: 0f b6 c2 movzbl %dl,%eax
: unsigned int mode = 0;
:
: if (*str == ' ')
: return NULL;
:
: while ((c = *str++) != ' ') {
0.00 : 4a0dda: 0f b6 13 movzbl (%rbx),%edx
16.74 : 4a0ddd: 48 83 c3 01 add $0x1,%rbx
: if (c < '0' || c > '7')
: return NULL;
: mode = (mode << 3) + (c - '0');
The first column is the percentage of samples that arrived on that
particular line - relative to the total cost of the function.
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-06-06 21:48:52 +08:00
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
2011-11-25 18:19:45 +08:00
|
|
|
static int __cmd_annotate(struct perf_annotate *ann)
|
2009-06-06 21:19:13 +08:00
|
|
|
{
|
2009-12-01 14:04:49 +08:00
|
|
|
int ret;
|
2014-08-12 14:40:35 +08:00
|
|
|
struct perf_session *session = ann->session;
|
2011-03-06 08:40:06 +08:00
|
|
|
struct perf_evsel *pos;
|
|
|
|
|
u64 total_nr_samples;
|
2009-12-12 07:24:02 +08:00
|
|
|
|
2011-11-17 22:33:21 +08:00
|
|
|
if (ann->cpu_list) {
|
|
|
|
|
ret = perf_session__cpu_bitmap(session, ann->cpu_list,
|
|
|
|
|
ann->cpu_bitmap);
|
2011-07-04 19:57:50 +08:00
|
|
|
if (ret)
|
2014-08-12 14:40:35 +08:00
|
|
|
goto out;
|
2011-07-04 19:57:50 +08:00
|
|
|
}
|
|
|
|
|
|
2018-05-29 01:24:45 +08:00
|
|
|
if (!ann->opts.objdump_path) {
|
|
|
|
|
ret = perf_env__lookup_objdump(&session->header.env,
|
|
|
|
|
&ann->opts.objdump_path);
|
2012-10-16 07:33:38 +08:00
|
|
|
if (ret)
|
2014-08-12 14:40:35 +08:00
|
|
|
goto out;
|
2012-10-16 07:33:38 +08:00
|
|
|
}
|
|
|
|
|
|
2015-03-03 22:58:45 +08:00
|
|
|
ret = perf_session__process_events(session);
|
2009-12-01 14:04:49 +08:00
|
|
|
if (ret)
|
2014-08-12 14:40:35 +08:00
|
|
|
goto out;
|
2009-06-06 21:19:13 +08:00
|
|
|
|
2009-11-28 02:29:22 +08:00
|
|
|
if (dump_trace) {
|
2010-05-14 21:36:42 +08:00
|
|
|
perf_session__fprintf_nr_events(session, stdout);
|
2014-10-11 02:49:21 +08:00
|
|
|
perf_evlist__fprintf_nr_events(session->evlist, stdout);
|
2014-08-12 14:40:35 +08:00
|
|
|
goto out;
|
2009-11-28 02:29:22 +08:00
|
|
|
}
|
2009-06-06 21:19:13 +08:00
|
|
|
|
2009-10-07 21:49:00 +08:00
|
|
|
if (verbose > 3)
|
2009-12-14 05:50:28 +08:00
|
|
|
perf_session__fprintf(session, stdout);
|
2009-06-06 21:19:13 +08:00
|
|
|
|
2009-10-07 21:49:00 +08:00
|
|
|
if (verbose > 2)
|
2010-04-28 08:22:44 +08:00
|
|
|
perf_session__fprintf_dsos(session, stdout);
|
2009-06-06 21:19:13 +08:00
|
|
|
|
2011-03-06 08:40:06 +08:00
|
|
|
total_nr_samples = 0;
|
2016-06-23 22:26:15 +08:00
|
|
|
evlist__for_each_entry(session->evlist, pos) {
|
2014-10-10 00:13:41 +08:00
|
|
|
struct hists *hists = evsel__hists(pos);
|
2011-03-06 08:40:06 +08:00
|
|
|
u32 nr_samples = hists->stats.nr_events[PERF_RECORD_SAMPLE];
|
|
|
|
|
|
|
|
|
|
if (nr_samples > 0) {
|
|
|
|
|
total_nr_samples += nr_samples;
|
2013-10-11 13:15:38 +08:00
|
|
|
hists__collapse_resort(hists, NULL);
|
2015-08-11 18:30:48 +08:00
|
|
|
/* Don't sort callchain */
|
|
|
|
|
perf_evsel__reset_sample_bit(pos, CALLCHAIN);
|
2016-01-18 17:24:00 +08:00
|
|
|
perf_evsel__output_resort(pos, NULL);
|
perf annotate: Add basic support to event group view
Add --group option to enable event grouping. When enabled, all the
group members information will be shown with the leader so skip
non-leader events.
It only supports --stdio output currently. Later patches will extend
additional features.
$ perf annotate --group --stdio
...
Percent | Source code & Disassembly of libpthread-2.15.so
--------------------------------------------------------------------------------
:
:
:
: Disassembly of section .text:
:
: 000000387dc0aa50 <__pthread_mutex_unlock_usercnt>:
8.08 2.40 5.29 : 387dc0aa50: mov %rdi,%rdx
0.00 0.00 0.00 : 387dc0aa53: mov 0x10(%rdi),%edi
0.00 0.00 0.00 : 387dc0aa56: mov %edi,%eax
0.00 0.80 0.00 : 387dc0aa58: and $0x7f,%eax
3.03 2.40 3.53 : 387dc0aa5b: test $0x7c,%dil
0.00 0.00 0.00 : 387dc0aa5f: jne 387dc0aaa9 <__pthread_mutex_unlock_use
0.00 0.00 0.00 : 387dc0aa61: test %eax,%eax
0.00 0.00 0.00 : 387dc0aa63: jne 387dc0aa85 <__pthread_mutex_unlock_use
0.00 0.00 0.00 : 387dc0aa65: and $0x80,%edi
0.00 0.00 0.00 : 387dc0aa6b: test %esi,%esi
3.03 5.60 7.06 : 387dc0aa6d: movl $0x0,0x8(%rdx)
0.00 0.00 0.59 : 387dc0aa74: je 387dc0aa7a <__pthread_mutex_unlock_use
0.00 0.00 0.00 : 387dc0aa76: subl $0x1,0xc(%rdx)
2.02 5.60 1.18 : 387dc0aa7a: mov %edi,%esi
0.00 0.00 0.00 : 387dc0aa7c: lock decl (%rdx)
83.84 83.20 82.35 : 387dc0aa7f: jne 387dc0aada <_L_unlock_586>
0.00 0.00 0.00 : 387dc0aa81: nop
0.00 0.00 0.00 : 387dc0aa82: xor %eax,%eax
0.00 0.00 0.00 : 387dc0aa84: retq
...
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1362462812-30885-6-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2013-03-05 13:53:25 +08:00
|
|
|
|
|
|
|
|
if (symbol_conf.event_group &&
|
|
|
|
|
!perf_evsel__is_group_leader(pos))
|
|
|
|
|
continue;
|
|
|
|
|
|
2013-03-05 13:53:21 +08:00
|
|
|
hists__find_annotations(hists, pos, ann);
|
2011-03-06 08:40:06 +08:00
|
|
|
}
|
|
|
|
|
}
|
2009-06-06 21:19:13 +08:00
|
|
|
|
2011-03-06 08:40:06 +08:00
|
|
|
if (total_nr_samples == 0) {
|
2017-01-24 05:25:41 +08:00
|
|
|
ui__error("The %s file has no samples!\n", session->data->file.path);
|
2014-08-12 14:40:35 +08:00
|
|
|
goto out;
|
2011-03-06 08:40:06 +08:00
|
|
|
}
|
2013-02-07 17:02:09 +08:00
|
|
|
|
2013-09-13 14:27:43 +08:00
|
|
|
if (use_browser == 2) {
|
|
|
|
|
void (*show_annotations)(void);
|
|
|
|
|
|
|
|
|
|
show_annotations = dlsym(perf_gtk_handle,
|
|
|
|
|
"perf_gtk__show_annotations");
|
|
|
|
|
if (show_annotations == NULL) {
|
|
|
|
|
ui__error("GTK browser not found!\n");
|
2014-08-12 14:40:35 +08:00
|
|
|
goto out;
|
2013-09-13 14:27:43 +08:00
|
|
|
}
|
|
|
|
|
show_annotations();
|
|
|
|
|
}
|
2013-02-07 17:02:09 +08:00
|
|
|
|
2014-08-12 14:40:35 +08:00
|
|
|
out:
|
2009-12-01 14:04:49 +08:00
|
|
|
return ret;
|
2009-06-06 21:19:13 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static const char * const annotate_usage[] = {
|
2012-01-08 01:25:30 +08:00
|
|
|
"perf annotate [<options>]",
|
2009-06-06 21:19:13 +08:00
|
|
|
NULL
|
|
|
|
|
};
|
|
|
|
|
|
2017-03-27 22:47:20 +08:00
|
|
|
int cmd_annotate(int argc, const char **argv)
|
2011-11-25 18:19:45 +08:00
|
|
|
{
|
|
|
|
|
struct perf_annotate annotate = {
|
2011-11-28 18:30:20 +08:00
|
|
|
.tool = {
|
2011-11-25 18:19:45 +08:00
|
|
|
.sample = process_sample_event,
|
|
|
|
|
.mmap = perf_event__process_mmap,
|
2013-08-21 18:10:25 +08:00
|
|
|
.mmap2 = perf_event__process_mmap2,
|
2011-11-25 18:19:45 +08:00
|
|
|
.comm = perf_event__process_comm,
|
2012-10-07 02:53:41 +08:00
|
|
|
.exit = perf_event__process_exit,
|
2012-10-07 02:44:59 +08:00
|
|
|
.fork = perf_event__process_fork,
|
perf tools: Add PERF_RECORD_NAMESPACES to include namespaces related info
Introduce a new option to record PERF_RECORD_NAMESPACES events emitted
by the kernel when fork, clone, setns or unshare are invoked. And update
perf-record documentation with the new option to record namespace
events.
Committer notes:
Combined it with a later patch to allow printing it via 'perf report -D'
and be able to test the feature introduced in this patch. Had to move
here also perf_ns__name(), that was introduced in another later patch.
Also used PRIu64 and PRIx64 to fix the build in some enfironments wrt:
util/event.c:1129:39: error: format '%lx' expects argument of type 'long unsigned int', but argument 6 has type 'long long unsigned int' [-Werror=format=]
ret += fprintf(fp, "%u/%s: %lu/0x%lx%s", idx
^
Testing it:
# perf record --namespaces -a
^C[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 1.083 MB perf.data (423 samples) ]
#
# perf report -D
<SNIP>
3 2028902078892 0x115140 [0xa0]: PERF_RECORD_NAMESPACES 14783/14783 - nr_namespaces: 7
[0/net: 3/0xf0000081, 1/uts: 3/0xeffffffe, 2/ipc: 3/0xefffffff, 3/pid: 3/0xeffffffc,
4/user: 3/0xeffffffd, 5/mnt: 3/0xf0000000, 6/cgroup: 3/0xeffffffb]
0x1151e0 [0x30]: event: 9
.
. ... raw event: size 48 bytes
. 0000: 09 00 00 00 02 00 30 00 c4 71 82 68 0c 7f 00 00 ......0..q.h....
. 0010: a9 39 00 00 a9 39 00 00 94 28 fe 63 d8 01 00 00 .9...9...(.c....
. 0020: 03 00 00 00 00 00 00 00 ce c4 02 00 00 00 00 00 ................
<SNIP>
NAMESPACES events: 1
<SNIP>
#
Signed-off-by: Hari Bathini <hbathini@linux.vnet.ibm.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexei Starovoitov <ast@fb.com>
Cc: Ananth N Mavinakayanahalli <ananth@linux.vnet.ibm.com>
Cc: Aravinda Prasad <aravinda@linux.vnet.ibm.com>
Cc: Brendan Gregg <brendan.d.gregg@gmail.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Eric Biederman <ebiederm@xmission.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Sargun Dhillon <sargun@sargun.me>
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/148891930386.25309.18412039920746995488.stgit@hbathini.in.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-03-08 04:41:43 +08:00
|
|
|
.namespaces = perf_event__process_namespaces,
|
perf annotate: Process attr and build_id records
perf annotate did not get some love for pipe-mode, and did not have
.attr and .buil_id setup (while record and inject did. Fix that.
It can easily be reproduced by:
perf record -o - noploop | perf annotate
that in my system shows:
0xd8 [0x28]: failed to process type: 9
Committer Testing:
Before:
$ perf record -o - stress -t 2 -c 2 | perf annotate --stdio
stress: info: [11060] dispatching hogs: 2 cpu, 0 io, 0 vm, 0 hdd
0x4470 [0x28]: failed to process type: 9
$ stress: info: [11060] successful run completed in 2s
$
After:
$ perf record -o - stress -t 2 -c 2 | perf annotate --stdio
stress: info: [11871] dispatching hogs: 2 cpu, 0 io, 0 vm, 0 hdd
stress: info: [11871] successful run completed in 2s
[ perf record: Woken up 2 times to write data ]
[ perf record: Captured and wrote 0.000 MB - ]
no symbols found in /usr/bin/stress, maybe install a debug package?
Percent | Source code & Disassembly of libc-2.24.so for cycles:uhH (6117 samples)
---------------------------------------------------------------------------------------
:
: Disassembly of section .text:
:
: 000000000003b050 <random_r>:
: __random_r():
10.56 : 3b050: test %rdi,%rdi
0.00 : 3b053: je 3b0d0 <random_r+0x80>
0.34 : 3b055: test %rsi,%rsi
0.00 : 3b058: je 3b0d0 <random_r+0x80>
0.46 : 3b05a: mov 0x18(%rdi),%eax
12.44 : 3b05d: mov 0x10(%rdi),%r8
0.18 : 3b061: test %eax,%eax
0.00 : 3b063: je 3b0b0 <random_r+0x60>
<SNIP>
Signed-off-by: David Carrillo-Cisneros <davidcc@google.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: He Kuang <hekuang@huawei.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Paul Turner <pjt@google.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Simon Que <sque@chromium.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/20170410201432.24807-5-davidcc@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-04-11 04:14:29 +08:00
|
|
|
.attr = perf_event__process_attr,
|
|
|
|
|
.build_id = perf_event__process_build_id,
|
2017-07-19 09:18:38 +08:00
|
|
|
.tracing_data = perf_event__process_tracing_data,
|
2018-06-25 20:42:20 +08:00
|
|
|
.feature = process_feature_event,
|
2014-07-06 20:18:21 +08:00
|
|
|
.ordered_events = true,
|
2011-11-25 18:19:45 +08:00
|
|
|
.ordering_requires_timestamps = true,
|
|
|
|
|
},
|
2018-05-26 04:28:37 +08:00
|
|
|
.opts = annotation__default_options,
|
2011-11-25 18:19:45 +08:00
|
|
|
};
|
2017-01-24 05:07:59 +08:00
|
|
|
struct perf_data data = {
|
2014-08-12 14:40:35 +08:00
|
|
|
.mode = PERF_DATA_MODE_READ,
|
|
|
|
|
};
|
2017-08-18 16:46:48 +08:00
|
|
|
struct option options[] = {
|
2012-10-30 11:56:02 +08:00
|
|
|
OPT_STRING('i', "input", &input_name, "file",
|
2009-06-06 21:19:13 +08:00
|
|
|
"input file name"),
|
2010-03-25 03:40:16 +08:00
|
|
|
OPT_STRING('d', "dsos", &symbol_conf.dso_list_str, "dso[,dso...]",
|
|
|
|
|
"only consider symbols in these dsos"),
|
2011-11-17 22:33:21 +08:00
|
|
|
OPT_STRING('s', "symbol", &annotate.sym_hist_filter, "symbol",
|
perf_counter tools: Add 'perf annotate' feature
Add new perf sub-command to display annotated source code:
$ perf annotate decode_tree_entry
------------------------------------------------
Percent | Source code & Disassembly of /home/mingo/git/git
------------------------------------------------
:
: /home/mingo/git/git: file format elf64-x86-64
:
:
: Disassembly of section .text:
:
: 00000000004a0da0 <decode_tree_entry>:
: *modep = mode;
: return str;
: }
:
: static void decode_tree_entry(struct tree_desc *desc, const char *buf, unsigned long size)
: {
3.82 : 4a0da0: 41 54 push %r12
: const char *path;
: unsigned int mode, len;
:
: if (size < 24 || buf[size - 21])
0.17 : 4a0da2: 48 83 fa 17 cmp $0x17,%rdx
: *modep = mode;
: return str;
: }
:
: static void decode_tree_entry(struct tree_desc *desc, const char *buf, unsigned long size)
: {
0.00 : 4a0da6: 49 89 fc mov %rdi,%r12
0.00 : 4a0da9: 55 push %rbp
3.37 : 4a0daa: 53 push %rbx
: const char *path;
: unsigned int mode, len;
:
: if (size < 24 || buf[size - 21])
0.08 : 4a0dab: 76 73 jbe 4a0e20 <decode_tree_entry+0x80>
0.00 : 4a0dad: 80 7c 16 eb 00 cmpb $0x0,-0x15(%rsi,%rdx,1)
3.48 : 4a0db2: 75 6c jne 4a0e20 <decode_tree_entry+0x80>
: static const char *get_mode(const char *str, unsigned int *modep)
: {
: unsigned char c;
: unsigned int mode = 0;
:
: if (*str == ' ')
1.94 : 4a0db4: 0f b6 06 movzbl (%rsi),%eax
0.39 : 4a0db7: 3c 20 cmp $0x20,%al
0.00 : 4a0db9: 74 65 je 4a0e20 <decode_tree_entry+0x80>
: return NULL;
:
: while ((c = *str++) != ' ') {
0.06 : 4a0dbb: 89 c2 mov %eax,%edx
: if (c < '0' || c > '7')
1.99 : 4a0dbd: 31 ed xor %ebp,%ebp
: unsigned int mode = 0;
:
: if (*str == ' ')
: return NULL;
:
: while ((c = *str++) != ' ') {
1.74 : 4a0dbf: 48 8d 5e 01 lea 0x1(%rsi),%rbx
: if (c < '0' || c > '7')
0.00 : 4a0dc3: 8d 42 d0 lea -0x30(%rdx),%eax
0.17 : 4a0dc6: 3c 07 cmp $0x7,%al
0.00 : 4a0dc8: 76 0d jbe 4a0dd7 <decode_tree_entry+0x37>
0.00 : 4a0dca: eb 54 jmp 4a0e20 <decode_tree_entry+0x80>
0.00 : 4a0dcc: 0f 1f 40 00 nopl 0x0(%rax)
16.57 : 4a0dd0: 8d 42 d0 lea -0x30(%rdx),%eax
0.14 : 4a0dd3: 3c 07 cmp $0x7,%al
0.00 : 4a0dd5: 77 49 ja 4a0e20 <decode_tree_entry+0x80>
: return NULL;
: mode = (mode << 3) + (c - '0');
3.12 : 4a0dd7: 0f b6 c2 movzbl %dl,%eax
: unsigned int mode = 0;
:
: if (*str == ' ')
: return NULL;
:
: while ((c = *str++) != ' ') {
0.00 : 4a0dda: 0f b6 13 movzbl (%rbx),%edx
16.74 : 4a0ddd: 48 83 c3 01 add $0x1,%rbx
: if (c < '0' || c > '7')
: return NULL;
: mode = (mode << 3) + (c - '0');
The first column is the percentage of samples that arrived on that
particular line - relative to the total cost of the function.
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-06-06 21:48:52 +08:00
|
|
|
"symbol to annotate"),
|
2017-01-24 05:07:59 +08:00
|
|
|
OPT_BOOLEAN('f', "force", &data.force, "don't complain, do it"),
|
2010-04-13 16:37:33 +08:00
|
|
|
OPT_INCR('v', "verbose", &verbose,
|
2009-06-06 21:19:13 +08:00
|
|
|
"be more verbose (show symbol address, etc)"),
|
2017-02-17 16:17:41 +08:00
|
|
|
OPT_BOOLEAN('q', "quiet", &quiet, "do now show any message"),
|
2009-06-06 21:19:13 +08:00
|
|
|
OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
|
|
|
|
|
"dump raw trace in ASCII"),
|
2013-02-07 17:02:08 +08:00
|
|
|
OPT_BOOLEAN(0, "gtk", &annotate.use_gtk, "Use the GTK interface"),
|
2011-11-17 22:33:21 +08:00
|
|
|
OPT_BOOLEAN(0, "tui", &annotate.use_tui, "Use the TUI interface"),
|
|
|
|
|
OPT_BOOLEAN(0, "stdio", &annotate.use_stdio, "Use the stdio interface"),
|
2018-03-16 10:44:34 +08:00
|
|
|
OPT_BOOLEAN(0, "stdio2", &annotate.use_stdio2, "Use the stdio interface"),
|
perf annotate: Introduce --ignore-vmlinux command line option
This is already present in 'perf top', albeit undocumented (will fix),
and is useful to use /proc/kcore instead of vmlinux and then get what is
really in place, not what the kernel starts with, before alternatives,
ftrace .text patching, etc, see the differences:
# perf annotate --stdio2 _raw_spin_lock_irqsave
_raw_spin_lock_irqsave() /lib/modules/4.16.0-rc4/build/vmlinux
Event: anon group { cycles, instructions }
0.00 3.17 → callq __fentry__
0.00 7.94 push %rbx
7.69 36.51 → callq __page_file_index
mov %rax,%rbx
7.69 3.17 → callq *ffffffff82225cd0
xor %eax,%eax
mov $0x1,%edx
80.77 49.21 lock cmpxchg %edx,(%rdi)
test %eax,%eax
↓ jne 2b
3.85 0.00 mov %rbx,%rax
pop %rbx
← retq
2b: mov %eax,%esi
→ callq queued_spin_lock_slowpath
mov %rbx,%rax
pop %rbx
← retq
[root@jouet ~]# perf annotate --ignore-vmlinux --stdio2 _raw_spin_lock_irqsave
_raw_spin_lock_irqsave() /proc/kcore
Event: anon group { cycles, instructions }
0.00 3.17 nop
0.00 7.94 push %rbx
0.00 23.81 pushfq
7.69 12.70 pop %rax
nop
mov %rax,%rbx
7.69 3.17 cli
nop
xor %eax,%eax
mov $0x1,%edx
80.77 49.21 lock cmpxchg %edx,(%rdi)
test %eax,%eax
↓ jne 2b
3.85 0.00 mov %rbx,%rax
pop %rbx
← retq
2b: mov %eax,%esi
→ callq *ffffffff820e96b0
mov %rbx,%rax
pop %rbx
← retq
#
Diff of the output of those commands:
# perf annotate --stdio2 _raw_spin_lock_irqsave > /tmp/vmlinux
# perf annotate --ignore-vmlinux --stdio2 _raw_spin_lock_irqsave > /tmp/kcore
# diff -y /tmp/vmlinux /tmp/kcore
_raw_spin_lock_irqsave() vmlinux | _raw_spin_lock_irqsave() /proc/kcore
Event: anon group { cycles, instructions } Event: anon group { cycles, instructions }
0.00 3.17 → callq __fentry__ | 0.00 3.17 nop
0.00 7.94 push %rbx 0.00 7.94 push %rbx
7.69 36.51 → callq __page_file_index | 0.00 23.81 pushfq
> 7.69 12.70 pop %rax
> nop
mov %rax,%rbx mov %rax,%rbx
7.69 3.17 → callq *ffffffff82225cd0 | 7.69 3.17 cli
> nop
xor %eax,%eax xor %eax,%eax
mov $0x1,%edx mov $0x1,%edx
80.77 49.21 lock cmpxchg %edx,(%rdi) 80.77 49.21 lock cmpxchg %edx,(%rdi)
test %eax,%eax test %eax,%eax
↓ jne 2b ↓ jne 2b
3.85 0.00 mov %rbx,%rax 3.85 0.00 mov %rbx,%rax
pop %rbx pop %rbx
← retq ← retq
2b: mov %eax,%esi 2b: mov %eax,%esi
→ callq queued_spin_lock_slowpath| → callq *ffffffff820e96b0
mov %rbx,%rax mov %rbx,%rax
pop %rbx pop %rbx
← retq ← retq
#
This should be further streamlined by doing both annotations and
allowing the TUI to toggle initial/current, and show the patched
instructions in a slightly different color.
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jin Yao <yao.jin@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: https://lkml.kernel.org/n/tip-wz8d269hxkcwaczr0r4rhyjg@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2018-03-17 02:58:35 +08:00
|
|
|
OPT_BOOLEAN(0, "ignore-vmlinux", &symbol_conf.ignore_vmlinux,
|
|
|
|
|
"don't load vmlinux even if found"),
|
2009-11-24 22:05:15 +08:00
|
|
|
OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
|
|
|
|
|
"file", "vmlinux pathname"),
|
|
|
|
|
OPT_BOOLEAN('m', "modules", &symbol_conf.use_modules,
|
2009-07-02 14:09:46 +08:00
|
|
|
"load module symbols - WARNING: use only with -k and LIVE kernel"),
|
2018-05-26 04:28:37 +08:00
|
|
|
OPT_BOOLEAN('l', "print-line", &annotate.opts.print_lines,
|
2009-06-13 06:11:21 +08:00
|
|
|
"print matching source lines (may be slow)"),
|
2018-05-26 04:28:37 +08:00
|
|
|
OPT_BOOLEAN('P', "full-paths", &annotate.opts.full_path,
|
2009-07-02 14:09:46 +08:00
|
|
|
"Don't shorten the displayed pathnames"),
|
2013-02-07 17:02:14 +08:00
|
|
|
OPT_BOOLEAN(0, "skip-missing", &annotate.skip_missing,
|
|
|
|
|
"Skip symbols that cannot be annotated"),
|
perf annotate: Support '--group' option
With the '--group' option, even for non-explicit group, 'perf annotate'
will enable the group output.
For example,
$ perf record -e cycles,branches ./div
$ perf annotate main --stdio --group
: Disassembly of section .text:
:
: 00000000004004b0 <main>:
: main():
:
: return i;
: }
:
: int main(void)
: {
0.00 0.00 : 4004b0: push %rbx
: int i;
: int flag;
: volatile double x = 1212121212, y = 121212;
:
: s_randseed = time(0);
0.00 0.00 : 4004b1: xor %edi,%edi
: srand(s_randseed);
0.00 0.00 : 4004b3: mov $0x77359400,%ebx
:
: return i;
: }
:
But if without --group, there is only one event reported.
$ perf annotate main --stdio
: Disassembly of section .text:
:
: 00000000004004b0 <main>:
: main():
:
: return i;
: }
:
: int main(void)
: {
0.00 : 4004b0: push %rbx
: int i;
: int flag;
: volatile double x = 1212121212, y = 121212;
:
: s_randseed = time(0);
0.00 : 4004b1: xor %edi,%edi
: srand(s_randseed);
0.00 : 4004b3: mov $0x77359400,%ebx
:
: return i;
: }
Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1526914666-31839-4-git-send-email-yao.jin@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2018-05-21 22:57:46 +08:00
|
|
|
OPT_BOOLEAN_SET(0, "group", &symbol_conf.event_group,
|
|
|
|
|
&annotate.group_set,
|
|
|
|
|
"Show event group information together"),
|
2011-11-14 02:30:08 +08:00
|
|
|
OPT_STRING('C', "cpu", &annotate.cpu_list, "cpu", "list of cpus to profile"),
|
2016-05-19 19:47:37 +08:00
|
|
|
OPT_CALLBACK(0, "symfs", NULL, "directory",
|
|
|
|
|
"Look for files with symbols relative to this directory",
|
|
|
|
|
symbol__config_symfs),
|
2018-05-28 22:42:59 +08:00
|
|
|
OPT_BOOLEAN(0, "source", &annotate.opts.annotate_src,
|
2011-05-17 23:32:07 +08:00
|
|
|
"Interleave source code with assembly code (default)"),
|
2018-05-28 22:42:59 +08:00
|
|
|
OPT_BOOLEAN(0, "asm-raw", &annotate.opts.show_asm_raw,
|
2011-05-17 23:32:07 +08:00
|
|
|
"Display raw encoding of assembly instructions (default)"),
|
2018-05-28 22:50:21 +08:00
|
|
|
OPT_STRING('M', "disassembler-style", &annotate.opts.disassembler_style, "disassembler style",
|
2011-09-16 05:31:41 +08:00
|
|
|
"Specify disassembler style (e.g. -M intel for intel syntax)"),
|
2018-05-29 01:24:45 +08:00
|
|
|
OPT_STRING(0, "objdump", &annotate.opts.objdump_path, "path",
|
2012-09-04 18:32:30 +08:00
|
|
|
"objdump binary to use for disassembly and annotations"),
|
perf annotate: Add basic support to event group view
Add --group option to enable event grouping. When enabled, all the
group members information will be shown with the leader so skip
non-leader events.
It only supports --stdio output currently. Later patches will extend
additional features.
$ perf annotate --group --stdio
...
Percent | Source code & Disassembly of libpthread-2.15.so
--------------------------------------------------------------------------------
:
:
:
: Disassembly of section .text:
:
: 000000387dc0aa50 <__pthread_mutex_unlock_usercnt>:
8.08 2.40 5.29 : 387dc0aa50: mov %rdi,%rdx
0.00 0.00 0.00 : 387dc0aa53: mov 0x10(%rdi),%edi
0.00 0.00 0.00 : 387dc0aa56: mov %edi,%eax
0.00 0.80 0.00 : 387dc0aa58: and $0x7f,%eax
3.03 2.40 3.53 : 387dc0aa5b: test $0x7c,%dil
0.00 0.00 0.00 : 387dc0aa5f: jne 387dc0aaa9 <__pthread_mutex_unlock_use
0.00 0.00 0.00 : 387dc0aa61: test %eax,%eax
0.00 0.00 0.00 : 387dc0aa63: jne 387dc0aa85 <__pthread_mutex_unlock_use
0.00 0.00 0.00 : 387dc0aa65: and $0x80,%edi
0.00 0.00 0.00 : 387dc0aa6b: test %esi,%esi
3.03 5.60 7.06 : 387dc0aa6d: movl $0x0,0x8(%rdx)
0.00 0.00 0.59 : 387dc0aa74: je 387dc0aa7a <__pthread_mutex_unlock_use
0.00 0.00 0.00 : 387dc0aa76: subl $0x1,0xc(%rdx)
2.02 5.60 1.18 : 387dc0aa7a: mov %edi,%esi
0.00 0.00 0.00 : 387dc0aa7c: lock decl (%rdx)
83.84 83.20 82.35 : 387dc0aa7f: jne 387dc0aada <_L_unlock_586>
0.00 0.00 0.00 : 387dc0aa81: nop
0.00 0.00 0.00 : 387dc0aa82: xor %eax,%eax
0.00 0.00 0.00 : 387dc0aa84: retq
...
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1362462812-30885-6-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2013-03-05 13:53:25 +08:00
|
|
|
OPT_BOOLEAN(0, "group", &symbol_conf.event_group,
|
|
|
|
|
"Show event group information together"),
|
2015-06-20 03:10:43 +08:00
|
|
|
OPT_BOOLEAN(0, "show-total-period", &symbol_conf.show_total_period,
|
|
|
|
|
"Show a column with the sum of periods"),
|
2017-08-18 16:46:48 +08:00
|
|
|
OPT_BOOLEAN('n', "show-nr-samples", &symbol_conf.show_nr_samples,
|
|
|
|
|
"Show a column with the number of samples"),
|
2016-07-05 22:08:17 +08:00
|
|
|
OPT_CALLBACK_DEFAULT(0, "stdio-color", NULL, "mode",
|
|
|
|
|
"'always' (default), 'never' or 'auto' only applicable to --stdio mode",
|
|
|
|
|
stdio__config_color, "always"),
|
2018-08-04 21:05:20 +08:00
|
|
|
OPT_CALLBACK(0, "percent-type", &annotate.opts, "local-period",
|
|
|
|
|
"Set percent type local/global-period/hits",
|
|
|
|
|
annotate_parse_percent_type),
|
|
|
|
|
|
2009-06-06 21:19:13 +08:00
|
|
|
OPT_END()
|
2011-11-25 18:19:45 +08:00
|
|
|
};
|
2017-08-18 16:46:48 +08:00
|
|
|
int ret;
|
|
|
|
|
|
|
|
|
|
set_option_flag(options, 0, "show-total-period", PARSE_OPT_EXCLUSIVE);
|
|
|
|
|
set_option_flag(options, 0, "show-nr-samples", PARSE_OPT_EXCLUSIVE);
|
|
|
|
|
|
2014-10-10 03:16:00 +08:00
|
|
|
|
2017-08-18 16:46:48 +08:00
|
|
|
ret = hists__init();
|
2014-10-10 03:16:00 +08:00
|
|
|
if (ret < 0)
|
|
|
|
|
return ret;
|
2009-06-06 21:19:13 +08:00
|
|
|
|
2009-12-16 06:04:40 +08:00
|
|
|
argc = parse_options(argc, argv, options, annotate_usage, 0);
|
2015-12-10 11:00:53 +08:00
|
|
|
if (argc) {
|
|
|
|
|
/*
|
|
|
|
|
* Special case: if there's an argument left then assume that
|
|
|
|
|
* it's a symbol filter:
|
|
|
|
|
*/
|
|
|
|
|
if (argc > 1)
|
|
|
|
|
usage_with_options(annotate_usage, options);
|
|
|
|
|
|
|
|
|
|
annotate.sym_hist_filter = argv[0];
|
|
|
|
|
}
|
2009-12-16 06:04:40 +08:00
|
|
|
|
2017-08-18 16:47:03 +08:00
|
|
|
if (symbol_conf.show_nr_samples && annotate.use_gtk) {
|
|
|
|
|
pr_err("--show-nr-samples is not available in --gtk mode at this time\n");
|
2017-08-18 16:46:48 +08:00
|
|
|
return ret;
|
|
|
|
|
}
|
|
|
|
|
|
2017-02-17 16:17:41 +08:00
|
|
|
if (quiet)
|
|
|
|
|
perf_quiet_option();
|
|
|
|
|
|
2017-01-24 05:25:41 +08:00
|
|
|
data.file.path = input_name;
|
2015-05-29 20:06:44 +08:00
|
|
|
|
2017-01-24 05:07:59 +08:00
|
|
|
annotate.session = perf_session__new(&data, false, &annotate.tool);
|
2014-08-12 14:40:35 +08:00
|
|
|
if (annotate.session == NULL)
|
2014-09-24 09:33:37 +08:00
|
|
|
return -1;
|
2014-08-12 14:40:35 +08:00
|
|
|
|
perf annotate: Support to display the IPC/Cycle in TUI mode
Unlike the perf report interactive annotate mode, the perf annotate
doesn't display the IPC/Cycle even if branch info is recorded in perf
data file.
perf record -b ...
perf annotate function
It should show IPC/cycle, but it doesn't.
This patch lets perf annotate support the displaying of IPC/Cycle if
branch info is in perf data.
For example,
perf annotate compute_flag
Percent│ IPC Cycle
│
│
│ Disassembly of section .text:
│
│ 0000000000400640 <compute_flag>:
│ compute_flag():
│ volatile int count;
│ static unsigned int s_randseed;
│
│ __attribute__((noinline))
│ int compute_flag()
│ {
22.96 │1.18 584 sub $0x8,%rsp
│ int i;
│
│ i = rand() % 2;
23.02 │1.18 1 → callq rand@plt
│
│ return i;
27.05 │3.37 mov %eax,%edx
│ }
│3.37 add $0x8,%rsp
│ {
│ int i;
│
│ i = rand() % 2;
│
│ return i;
│3.37 shr $0x1f,%edx
│3.37 add %edx,%eax
│3.37 and $0x1,%eax
│3.37 sub %edx,%eax
│ }
26.97 │3.37 2 ← retq
Note that, this patch only supports TUI mode. For stdio, now it just keeps
original behavior. Will support it in a follow-up patch.
$ perf annotate compute_flag --stdio
Percent | Source code & Disassembly of div for cycles:ppp (7993 samples)
------------------------------------------------------------------------------
:
:
:
: Disassembly of section .text:
:
: 0000000000400640 <compute_flag>:
: compute_flag():
: volatile int count;
: static unsigned int s_randseed;
:
: __attribute__((noinline))
: int compute_flag()
: {
0.29 : 400640: sub $0x8,%rsp # +100.00%
: int i;
:
: i = rand() % 2;
42.93 : 400644: callq 400490 <rand@plt> # -100.00% (p:100.00%)
:
: return i;
0.10 : 400649: mov %eax,%edx # +100.00%
: }
0.94 : 40064b: add $0x8,%rsp
: {
: int i;
:
: i = rand() % 2;
:
: return i;
27.02 : 40064f: shr $0x1f,%edx
0.15 : 400652: add %edx,%eax
1.24 : 400654: and $0x1,%eax
2.08 : 400657: sub %edx,%eax
: }
25.26 : 400659: retq # -100.00% (p:100.00%)
Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
Acked-by: Andi Kleen <ak@linux.intel.com>
Link: http://lkml.kernel.org/r/20180223170210.GC7045@tassilo.jf.intel.com
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1519724327-7773-1-git-send-email-yao.jin@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2018-02-27 17:38:47 +08:00
|
|
|
annotate.has_br_stack = perf_header__has_feat(&annotate.session->header,
|
|
|
|
|
HEADER_BRANCH_STACK);
|
|
|
|
|
|
perf annotate: Support '--group' option
With the '--group' option, even for non-explicit group, 'perf annotate'
will enable the group output.
For example,
$ perf record -e cycles,branches ./div
$ perf annotate main --stdio --group
: Disassembly of section .text:
:
: 00000000004004b0 <main>:
: main():
:
: return i;
: }
:
: int main(void)
: {
0.00 0.00 : 4004b0: push %rbx
: int i;
: int flag;
: volatile double x = 1212121212, y = 121212;
:
: s_randseed = time(0);
0.00 0.00 : 4004b1: xor %edi,%edi
: srand(s_randseed);
0.00 0.00 : 4004b3: mov $0x77359400,%ebx
:
: return i;
: }
:
But if without --group, there is only one event reported.
$ perf annotate main --stdio
: Disassembly of section .text:
:
: 00000000004004b0 <main>:
: main():
:
: return i;
: }
:
: int main(void)
: {
0.00 : 4004b0: push %rbx
: int i;
: int flag;
: volatile double x = 1212121212, y = 121212;
:
: s_randseed = time(0);
0.00 : 4004b1: xor %edi,%edi
: srand(s_randseed);
0.00 : 4004b3: mov $0x77359400,%ebx
:
: return i;
: }
Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1526914666-31839-4-git-send-email-yao.jin@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2018-05-21 22:57:46 +08:00
|
|
|
if (annotate.group_set)
|
|
|
|
|
perf_evlist__force_leader(annotate.session->evlist);
|
|
|
|
|
|
2016-08-26 03:09:21 +08:00
|
|
|
ret = symbol__annotation_init();
|
|
|
|
|
if (ret < 0)
|
|
|
|
|
goto out_delete;
|
|
|
|
|
|
2018-03-17 01:33:38 +08:00
|
|
|
annotation_config__init();
|
|
|
|
|
|
2009-12-16 06:04:39 +08:00
|
|
|
symbol_conf.try_vmlinux_path = true;
|
|
|
|
|
|
2014-08-12 14:40:45 +08:00
|
|
|
ret = symbol__init(&annotate.session->header.env);
|
2014-08-12 14:40:35 +08:00
|
|
|
if (ret < 0)
|
|
|
|
|
goto out_delete;
|
2009-06-06 21:19:13 +08:00
|
|
|
|
2018-03-16 10:44:34 +08:00
|
|
|
if (annotate.use_stdio || annotate.use_stdio2)
|
2015-12-10 11:00:54 +08:00
|
|
|
use_browser = 0;
|
|
|
|
|
else if (annotate.use_tui)
|
|
|
|
|
use_browser = 1;
|
|
|
|
|
else if (annotate.use_gtk)
|
|
|
|
|
use_browser = 2;
|
|
|
|
|
|
|
|
|
|
setup_browser(true);
|
|
|
|
|
|
2018-03-16 10:44:34 +08:00
|
|
|
if ((use_browser == 1 || annotate.use_stdio2) && annotate.has_br_stack) {
|
perf annotate: Support to display the IPC/Cycle in TUI mode
Unlike the perf report interactive annotate mode, the perf annotate
doesn't display the IPC/Cycle even if branch info is recorded in perf
data file.
perf record -b ...
perf annotate function
It should show IPC/cycle, but it doesn't.
This patch lets perf annotate support the displaying of IPC/Cycle if
branch info is in perf data.
For example,
perf annotate compute_flag
Percent│ IPC Cycle
│
│
│ Disassembly of section .text:
│
│ 0000000000400640 <compute_flag>:
│ compute_flag():
│ volatile int count;
│ static unsigned int s_randseed;
│
│ __attribute__((noinline))
│ int compute_flag()
│ {
22.96 │1.18 584 sub $0x8,%rsp
│ int i;
│
│ i = rand() % 2;
23.02 │1.18 1 → callq rand@plt
│
│ return i;
27.05 │3.37 mov %eax,%edx
│ }
│3.37 add $0x8,%rsp
│ {
│ int i;
│
│ i = rand() % 2;
│
│ return i;
│3.37 shr $0x1f,%edx
│3.37 add %edx,%eax
│3.37 and $0x1,%eax
│3.37 sub %edx,%eax
│ }
26.97 │3.37 2 ← retq
Note that, this patch only supports TUI mode. For stdio, now it just keeps
original behavior. Will support it in a follow-up patch.
$ perf annotate compute_flag --stdio
Percent | Source code & Disassembly of div for cycles:ppp (7993 samples)
------------------------------------------------------------------------------
:
:
:
: Disassembly of section .text:
:
: 0000000000400640 <compute_flag>:
: compute_flag():
: volatile int count;
: static unsigned int s_randseed;
:
: __attribute__((noinline))
: int compute_flag()
: {
0.29 : 400640: sub $0x8,%rsp # +100.00%
: int i;
:
: i = rand() % 2;
42.93 : 400644: callq 400490 <rand@plt> # -100.00% (p:100.00%)
:
: return i;
0.10 : 400649: mov %eax,%edx # +100.00%
: }
0.94 : 40064b: add $0x8,%rsp
: {
: int i;
:
: i = rand() % 2;
:
: return i;
27.02 : 40064f: shr $0x1f,%edx
0.15 : 400652: add %edx,%eax
1.24 : 400654: and $0x1,%eax
2.08 : 400657: sub %edx,%eax
: }
25.26 : 400659: retq # -100.00% (p:100.00%)
Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
Acked-by: Andi Kleen <ak@linux.intel.com>
Link: http://lkml.kernel.org/r/20180223170210.GC7045@tassilo.jf.intel.com
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1519724327-7773-1-git-send-email-yao.jin@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2018-02-27 17:38:47 +08:00
|
|
|
sort__mode = SORT_MODE__BRANCH;
|
|
|
|
|
if (setup_sorting(annotate.session->evlist) < 0)
|
|
|
|
|
usage_with_options(annotate_usage, options);
|
|
|
|
|
} else {
|
|
|
|
|
if (setup_sorting(NULL) < 0)
|
|
|
|
|
usage_with_options(annotate_usage, options);
|
|
|
|
|
}
|
|
|
|
|
|
2014-08-12 14:40:35 +08:00
|
|
|
ret = __cmd_annotate(&annotate);
|
|
|
|
|
|
|
|
|
|
out_delete:
|
|
|
|
|
/*
|
|
|
|
|
* Speed up the exit process, for large files this can
|
|
|
|
|
* take quite a while.
|
|
|
|
|
*
|
|
|
|
|
* XXX Enable this when using valgrind or if we ever
|
|
|
|
|
* librarize this command.
|
|
|
|
|
*
|
|
|
|
|
* Also experiment with obstacks to see how much speed
|
|
|
|
|
* up we'll get here.
|
|
|
|
|
*
|
|
|
|
|
* perf_session__delete(session);
|
|
|
|
|
*/
|
|
|
|
|
return ret;
|
2009-06-06 21:19:13 +08:00
|
|
|
}
|