Commit Graph

50 Commits

Author SHA1 Message Date
Arnaldo Carvalho de Melo c1a604dff4 perf tools: Remove needless perf.h include directive from headers
Its not needed there, add it to the places that need it and were getting
it via those headers.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lkml.kernel.org/n/tip-5yulx1u16vyd0zmrbg1tjhju@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-08-29 17:38:32 -03:00
Arnaldo Carvalho de Melo 91854f9a07 perf tools: Move everything related to sys_perf_event_open() to perf-sys.h
And remove unneeded include directives from perf-sys.h to prune the
header dependency tree.

Fixup the fallout in places where definitions were being used without
the needed include directives that were being satisfied because they
were in perf-sys.h.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lkml.kernel.org/n/tip-7b1zvugiwak4ibfa3j6ott7f@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-08-29 17:38:32 -03:00
Jiri Olsa 72932371e7 libperf: Rename the PERF_RECORD_ structs to have a "perf" prefix
Even more, to have a "perf_record_" prefix, so that they match the
PERF_RECORD_ enum they map to.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20190828135717.7245-23-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-08-29 08:36:12 -03:00
Adrian Hunter 181ebb5e23 perf tools: Add itrace option 'o' to synthesize aux-output events
Add itrace option 'o' to synthesize events recorded in the AUX area due
to the use of perf record's aux-output config term.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20190806084606.4021-5-alexander.shishkin@linux.intel.com
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-08-14 10:59:59 -03:00
Alexander Shishkin ce7b0e426e perf record: Add an option to take an AUX snapshot on exit
It is sometimes useful to generate a snapshot when perf record exits;
I've been using a wrapper script around the workload that would do a
killall -USR2 perf when the workload exits.

This patch makes it easier and also works when perf record is attached
to a pre-existing task. A new snapshot option 'e' can be specified in
-S to enable this behavior:

root@elsewhere:~# perf record -e intel_pt// -Se sleep 1
[ perf record: Woken up 2 times to write data ]
[ perf record: Captured and wrote 0.085 MB perf.data ]

Co-developed-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20190806144101.62892-1-alexander.shishkin@linux.intel.com
[ Fixed up !HAVE_AUXTRACE_SUPPORT build in builtin-record.c, adding 2 missing __maybe_unused ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-08-14 10:59:59 -03:00
Jiri Olsa 63503dba87 perf evlist: Rename struct perf_evlist to struct evlist
Rename struct perf_evlist to struct evlist, so we don't have a name
clash when we add struct perf_evlist in libperf.

Committer notes:

Added fixes to build on arm64, from Jiri and from me
(tools/perf/util/cs-etm.c)

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexey Budankov <alexey.budankov@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20190721112506.12306-6-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-07-29 18:34:42 -03:00
Ingo Molnar 3ce5aceb5d perf/core improvements and fixes:
perf record:
 
   Alexey Budankov:
 
   - Allow mixing --user-regs with --call-graph=dwarf, making sure that
     the minimal set of registers for DWARF unwinding is present in the
     set of user registers requested to be present in each sample, while
     warning the user that this may make callchains unreliable if more
     that the minimal set of registers is needed to unwind.
 
   yuzhoujian:
 
   - Add support to collect callchains from kernel or user space only,
     IOW allow setting the perf_event_attr.exclude_callchain_{kernel,user}
     bits from the command line.
 
 perf trace:
 
   Arnaldo Carvalho de Melo:
 
   - Remove x86_64 specific syscall numbers from the augmented_raw_syscalls
     BPF in-kernel collector of augmented raw_syscalls:sys_{enter,exit}
     payloads, use instead the syscall numbers obtainer either by the
     arch specific syscalltbl generators or from audit-libs.
 
   - Allow 'perf trace' to ask for the number of bytes to collect for
     string arguments, for now ask for PATH_MAX, i.e. the whole
     pathnames, which ends up being just a way to speficy which syscall
     args are pathnames and thus should be read using bpf_probe_read_str().
 
   - Skip unknown syscalls when expanding strace like syscall groups.
     This helps using the 'string' group of syscalls to work in arm64,
     where some of the syscalls present in x86_64 that deal with
     strings, for instance 'access', are deprecated and this should not
     be asked for tracing.
 
   Leo Yan:
 
   - Exit when failing to build eBPF program.
 
 perf config:
 
   Arnaldo Carvalho de Melo:
 
   - Bail out when a handler returns failure for a key-value pair. This
     helps with cases where processing a key-value pair is not just a
     matter of setting some tool specific knob, involving, for instance
     building a BPF program to then attach to the list of events 'perf
     trace' will use, e.g. augmented_raw_syscalls.c.
 
 perf.data:
 
   Kan Liang:
 
   - Read and store die ID information available in new Intel processors
     in CPUID.1F in the CPU topology written in the perf.data header.
 
 perf stat:
 
   Kan Liang:
 
   - Support per-die aggregation.
 
 Documentation:
 
   Arnaldo Carvalho de Melo:
 
   - Update perf.data documentation about the CPU_TOPOLOGY, MEM_TOPOLOGY,
     CLOCKID and DIR_FORMAT headers.
 
   Song Liu:
 
   - Add description of headers HEADER_BPF_PROG_INFO and HEADER_BPF_BTF.
 
   Leo Yan:
 
   - Update default value for llvm.clang-bpf-cmd-template in 'man perf-config'.
 
 JVMTI:
 
   Jiri Olsa:
 
   - Address gcc string overflow warning for strncpy()
 
 core:
 
   - Remove superfluous nthreads system_wide setup in perf_evsel__alloc_fd().
 
 Intel PT:
 
   Adrian Hunter:
 
   - Add support for samples to contain IPC ratio, collecting cycles
     information from CYC packets, showing the IPC info periodically, because
     Intel PT does not update the cycle count on every branch or instruction,
     the incremental values will often be zero.  When there are values, they
     will be the number of instructions and number of cycles since the last
     update, and thus represent the average IPC since the last IPC value.
 
     E.g.:
 
     # perf record --cpu 1 -m200000 -a -e intel_pt/cyc/u sleep 0.0001
     rounding mmap pages size to 1024M (262144 pages)
     [ perf record: Woken up 0 times to write data ]
     [ perf record: Captured and wrote 2.208 MB perf.data ]
     # perf script --insn-trace --xed -F+ipc,-dso,-cpu,-tid
     #
     <SNIP + add line numbering to make sense of IPC counts e.g.: (18/3)>
     1   cc1 63501.650479626: 7f5219ac27bf _int_free+0x3f   jnz 0x7f5219ac2af0       IPC: 0.81 (36/44)
     2   cc1 63501.650479626: 7f5219ac27c5 _int_free+0x45   cmp $0x1f, %rbp
     3   cc1 63501.650479626: 7f5219ac27c9 _int_free+0x49   jbe 0x7f5219ac2b00
     4   cc1 63501.650479626: 7f5219ac27cf _int_free+0x4f   test $0x8, %al
     5   cc1 63501.650479626: 7f5219ac27d1 _int_free+0x51   jnz 0x7f5219ac2b00
     6   cc1 63501.650479626: 7f5219ac27d7 _int_free+0x57   movq  0x13c58a(%rip), %rcx
     7   cc1 63501.650479626: 7f5219ac27de _int_free+0x5e   mov %rdi, %r12
     8   cc1 63501.650479626: 7f5219ac27e1 _int_free+0x61   movq  %fs:(%rcx), %rax
     9   cc1 63501.650479626: 7f5219ac27e5 _int_free+0x65   test %rax, %rax
    10   cc1 63501.650479626: 7f5219ac27e8 _int_free+0x68   jz 0x7f5219ac2821
    11   cc1 63501.650479626: 7f5219ac27ea _int_free+0x6a   leaq  -0x11(%rbp), %rdi
    12   cc1 63501.650479626: 7f5219ac27ee _int_free+0x6e   mov %rdi, %rsi
    13   cc1 63501.650479626: 7f5219ac27f1 _int_free+0x71   shr $0x4, %rsi
    14   cc1 63501.650479626: 7f5219ac27f5 _int_free+0x75   cmpq  %rsi, 0x13caf4(%rip)
    15   cc1 63501.650479626: 7f5219ac27fc _int_free+0x7c   jbe 0x7f5219ac2821
    16   cc1 63501.650479626: 7f5219ac2821 _int_free+0xa1   cmpq  0x13f138(%rip), %rbp
    17   cc1 63501.650479626: 7f5219ac2828 _int_free+0xa8   jnbe 0x7f5219ac28d8
    18   cc1 63501.650479626: 7f5219ac28d8 _int_free+0x158  testb  $0x2, 0x8(%rbx)
    19   cc1 63501.650479628: 7f5219ac28dc _int_free+0x15c  jnz 0x7f5219ac2ab0       IPC: 6.00 (18/3)
     <SNIP>
 
   - Allow using time ranges with Intel PT, i.e. these features, already
     present but not optimially usable with Intel PT, should be now:
 
         Select the second 10% time slice:
 
         $ perf script --time 10%/2
 
         Select from 0% to 10% time slice:
 
         $ perf script --time 0%-10%
 
         Select the first and second 10% time slices:
 
         $ perf script --time 10%/1,10%/2
 
         Select from 0% to 10% and 30% to 40% slices:
 
         $ perf script --time 0%-10%,30%-40%
 
 cs-etm (ARM):
 
   Mathieu Poirier:
 
   - Add support for CPU-wide trace scenarios.
 
 s390:
 
   Thomas Richter:
 
   - Fix missing kvm module load for s390.
 
   - Fix OOM error in TUI mode on s390
 
   - Support s390 diag event display when doing analysis on !s390
     architectures.
 
 Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Merge tag 'perf-core-for-mingo-5.3-20190611' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core

Pull perf/core improvements and fixes from Arnaldo Carvalho de Melo:

perf record:

  Alexey Budankov:

  - Allow mixing --user-regs with --call-graph=dwarf, making sure that
    the minimal set of registers for DWARF unwinding is present in the
    set of user registers requested to be present in each sample, while
    warning the user that this may make callchains unreliable if more
    that the minimal set of registers is needed to unwind.

  yuzhoujian:

  - Add support to collect callchains from kernel or user space only,
    IOW allow setting the perf_event_attr.exclude_callchain_{kernel,user}
    bits from the command line.

perf trace:

  Arnaldo Carvalho de Melo:

  - Remove x86_64 specific syscall numbers from the augmented_raw_syscalls
    BPF in-kernel collector of augmented raw_syscalls:sys_{enter,exit}
    payloads, use instead the syscall numbers obtainer either by the
    arch specific syscalltbl generators or from audit-libs.

  - Allow 'perf trace' to ask for the number of bytes to collect for
    string arguments, for now ask for PATH_MAX, i.e. the whole
    pathnames, which ends up being just a way to speficy which syscall
    args are pathnames and thus should be read using bpf_probe_read_str().

  - Skip unknown syscalls when expanding strace like syscall groups.
    This helps using the 'string' group of syscalls to work in arm64,
    where some of the syscalls present in x86_64 that deal with
    strings, for instance 'access', are deprecated and this should not
    be asked for tracing.

  Leo Yan:

  - Exit when failing to build eBPF program.

perf config:

  Arnaldo Carvalho de Melo:

  - Bail out when a handler returns failure for a key-value pair. This
    helps with cases where processing a key-value pair is not just a
    matter of setting some tool specific knob, involving, for instance
    building a BPF program to then attach to the list of events 'perf
    trace' will use, e.g. augmented_raw_syscalls.c.

perf.data:

  Kan Liang:

  - Read and store die ID information available in new Intel processors
    in CPUID.1F in the CPU topology written in the perf.data header.

perf stat:

  Kan Liang:

  - Support per-die aggregation.

Documentation:

  Arnaldo Carvalho de Melo:

  - Update perf.data documentation about the CPU_TOPOLOGY, MEM_TOPOLOGY,
    CLOCKID and DIR_FORMAT headers.

  Song Liu:

  - Add description of headers HEADER_BPF_PROG_INFO and HEADER_BPF_BTF.

  Leo Yan:

  - Update default value for llvm.clang-bpf-cmd-template in 'man perf-config'.

JVMTI:

  Jiri Olsa:

  - Address gcc string overflow warning for strncpy()

core:

  - Remove superfluous nthreads system_wide setup in perf_evsel__alloc_fd().

Intel PT:

  Adrian Hunter:

  - Add support for samples to contain IPC ratio, collecting cycles
    information from CYC packets, showing the IPC info periodically, because
    Intel PT does not update the cycle count on every branch or instruction,
    the incremental values will often be zero.  When there are values, they
    will be the number of instructions and number of cycles since the last
    update, and thus represent the average IPC since the last IPC value.

    E.g.:

    # perf record --cpu 1 -m200000 -a -e intel_pt/cyc/u sleep 0.0001
    rounding mmap pages size to 1024M (262144 pages)
    [ perf record: Woken up 0 times to write data ]
    [ perf record: Captured and wrote 2.208 MB perf.data ]
    # perf script --insn-trace --xed -F+ipc,-dso,-cpu,-tid
    #
    <SNIP + add line numbering to make sense of IPC counts e.g.: (18/3)>
    1   cc1 63501.650479626: 7f5219ac27bf _int_free+0x3f   jnz 0x7f5219ac2af0       IPC: 0.81 (36/44)
    2   cc1 63501.650479626: 7f5219ac27c5 _int_free+0x45   cmp $0x1f, %rbp
    3   cc1 63501.650479626: 7f5219ac27c9 _int_free+0x49   jbe 0x7f5219ac2b00
    4   cc1 63501.650479626: 7f5219ac27cf _int_free+0x4f   test $0x8, %al
    5   cc1 63501.650479626: 7f5219ac27d1 _int_free+0x51   jnz 0x7f5219ac2b00
    6   cc1 63501.650479626: 7f5219ac27d7 _int_free+0x57   movq  0x13c58a(%rip), %rcx
    7   cc1 63501.650479626: 7f5219ac27de _int_free+0x5e   mov %rdi, %r12
    8   cc1 63501.650479626: 7f5219ac27e1 _int_free+0x61   movq  %fs:(%rcx), %rax
    9   cc1 63501.650479626: 7f5219ac27e5 _int_free+0x65   test %rax, %rax
   10   cc1 63501.650479626: 7f5219ac27e8 _int_free+0x68   jz 0x7f5219ac2821
   11   cc1 63501.650479626: 7f5219ac27ea _int_free+0x6a   leaq  -0x11(%rbp), %rdi
   12   cc1 63501.650479626: 7f5219ac27ee _int_free+0x6e   mov %rdi, %rsi
   13   cc1 63501.650479626: 7f5219ac27f1 _int_free+0x71   shr $0x4, %rsi
   14   cc1 63501.650479626: 7f5219ac27f5 _int_free+0x75   cmpq  %rsi, 0x13caf4(%rip)
   15   cc1 63501.650479626: 7f5219ac27fc _int_free+0x7c   jbe 0x7f5219ac2821
   16   cc1 63501.650479626: 7f5219ac2821 _int_free+0xa1   cmpq  0x13f138(%rip), %rbp
   17   cc1 63501.650479626: 7f5219ac2828 _int_free+0xa8   jnbe 0x7f5219ac28d8
   18   cc1 63501.650479626: 7f5219ac28d8 _int_free+0x158  testb  $0x2, 0x8(%rbx)
   19   cc1 63501.650479628: 7f5219ac28dc _int_free+0x15c  jnz 0x7f5219ac2ab0       IPC: 6.00 (18/3)
    <SNIP>

  - Allow using time ranges with Intel PT, i.e. these features, already
    present but not optimially usable with Intel PT, should be now:

        Select the second 10% time slice:

        $ perf script --time 10%/2

        Select from 0% to 10% time slice:

        $ perf script --time 0%-10%

        Select the first and second 10% time slices:

        $ perf script --time 10%/1,10%/2

        Select from 0% to 10% and 30% to 40% slices:

        $ perf script --time 0%-10%,30%-40%

cs-etm (ARM):

  Mathieu Poirier:

  - Add support for CPU-wide trace scenarios.

s390:

  Thomas Richter:

  - Fix missing kvm module load for s390.

  - Fix OOM error in TUI mode on s390

  - Support s390 diag event display when doing analysis on !s390
    architectures.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2019-06-17 20:48:14 +02:00
Adrian Hunter 33526f362b perf auxtrace: Add perf time interval to itrace_synth_ops
Instruction trace decoders can optimize output based on what time
intervals will be filtered, so pass that information in
itrace_synth_ops.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jin Yao <yao.jin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/r/20190604130017.31207-2-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-06-10 16:20:11 -03:00
Thomas Gleixner 2025cf9e19 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 288
Based on 1 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms and conditions of the gnu general public license
  version 2 as published by the free software foundation this program
  is distributed in the hope it will be useful but without any
  warranty without even the implied warranty of merchantability or
  fitness for a particular purpose see the gnu general public license
  for more details

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 263 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Alexios Zavras <alexios.zavras@intel.com>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190529141901.208660670@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-06-05 17:36:37 +02:00
Adrian Hunter 16bd4321c2 perf auxtrace: Add timestamp to auxtrace errors
The timestamp can use useful to find part of a trace that has an error
without outputting all of the trace e.g. using the itrace 's' option to
skip initial number of events.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/r/20190206103947.15750-6-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-02-06 11:20:32 -03:00
Adrian Hunter c3fcadf0bb perf auxtrace: Define auxtrace record alignment
Define auxtrace record alignment so that it can be referenced elsewhere.

Note this is preparation for patch "perf intel-pt: Fix overlap calculation
for padding"

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: stable@vger.kernel.org
Link: http://lkml.kernel.org/r/20190206103947.15750-2-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-02-06 10:25:39 -03:00
Andi Kleen 4eb0681571 perf script: Make itrace script default to all calls
By default 'perf script' for itrace outputs sampled instructions or
branches. In my experience this is confusing to users because it's hard
to correlate with real program behavior. The sampling makes sense for
tools like 'perf report' that actually sample to reduce the run time,
but run time is normally not a problem for 'perf script'.  It's better
to give an accurate representation of the program flow.

Default 'perf script' to output all calls for itrace. That's a much saner
default. The old behavior can be still requested with 'perf script'
--itrace=ibxwpe100000

v2: Fix ETM build failure
v3: Really fix ETM build failure (Kim Phillips)

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Kim Phillips <kim.phillips@arm.com>
Cc: Leo Yan <leo.yan@linaro.org>
Link: http://lkml.kernel.org/r/20180920180540.14039-3-andi@firstfloor.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2018-10-24 15:29:54 -03:00
Arnaldo Carvalho de Melo 291ed51dee perf auxtrace: Include missing asm/bitsperlong.h to get BITS_PER_LONG
The auxtrace.h header references BITS_PER_LONG without including the
header where it is defined, getting it by luck from some other header,
fix it.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Sverdlin <alexander.sverdlin@nokia.com>
Cc: David Ahern <dsahern@gmail.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-v04ydmbh7tvpcctf3zld9j9s@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2018-10-08 14:23:43 -03:00
Andi Kleen c12e039d12 perf tools: Report itrace options in help
I often forget all the options that --itrace accepts. Instead of burying
them in the man page only report them in the normal command line help
too to make them easier accessible.

v2: Align

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kim Phillips <kim.phillips@arm.com>
Link: http://lkml.kernel.org/r/20180914031038.4160-2-andi@firstfloor.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2018-09-19 15:06:59 -03:00
Jiri Olsa ded2b8fe2e perf tools: Add 'struct perf_mmap' arg to record__write()
The struct perf_mmap map argument will hold the file pointer to write
the data to.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexey Budankov <alexey.budankov@linux.intel.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20180913125450.21342-5-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2018-09-19 10:25:11 -03:00
Jiri Olsa e035f4ca2a perf auxtrace: Pass struct perf_mmap into mmap__read* functions
The perf_mmap struct will hold a file pointer to write the mmap's
contents, so we need to propagate it down the stack to record__write
callers instead of its member the auxtrace_mmap struct.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexey Budankov <alexey.budankov@linux.intel.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20180913125450.21342-4-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2018-09-19 10:25:11 -03:00
Jiri Olsa 7336555a68 perf tools: Remove perf_tool from event_op3
Now that we keep a perf_tool pointer inside perf_session, there's no need
to have a perf_tool argument in the event_op3 callback. Remove it.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexey Budankov <alexey.budankov@linux.intel.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20180913125450.21342-3-jolsa@kernel.org
[ Fix the builtin-inject.c build for !HAVE_AUXTRACE_SUPPORT ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2018-09-19 10:25:10 -03:00
Jiri Olsa 89f1688a57 perf tools: Remove perf_tool from event_op2
Now that we keep a perf_tool pointer inside perf_session, there's no
need to have a perf_tool argument in the event_op2 callback. Remove it.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexey Budankov <alexey.budankov@linux.intel.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20180913125450.21342-2-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2018-09-19 10:25:10 -03:00
Thomas Richter b96e6615cd perf auxtrace: Support for perf report -D for s390
Add initial support for s390 auxiliary traces using the CPU-Measurement
Sampling Facility.

Support and ignore PERF_REPORT_AUXTRACE_INFO records in the perf data
file. Later patches will show the contents of the auxiliary traces.

Setup the auxtrace queues and data structures for s390.  A raw dump of
the perf.data file now does not show an error when an auxtrace event is
encountered.

Output before:

  [root@s35lp76 perf]# ./perf report -D -i perf.data.auxtrace
  0x128 [0x10]: failed to process type: 70
  Error:
  failed to process sample

  0x128 [0x10]: event: 70
  .
  . ... raw event: size 16 bytes
  .  0000:  00 00 00 46 00 00 00 10 00 00 00 00 00 00 00 00  ...F............

  0x128 [0x10]: PERF_RECORD_AUXTRACE_INFO type: 0
  [root@s35lp76 perf]#

Output after:

   # ./perf report -D -i perf.data.auxtrace |fgrep PERF_RECORD_AUXTRACE
  0 0 0x128 [0x10]: PERF_RECORD_AUXTRACE_INFO type: 5
  0 0 0x25a66 [0x30]: PERF_RECORD_AUXTRACE size: 0x40000
	   offset: 0  ref: 0  idx: 4  tid: -1  cpu: 4
  ....

Additional notes about the underlying hardware and software
implementation, provided by Hendrik Brueckner (see Link: below).

=============================================================================

The CPU-Measurement Facility (CPU-MF) provides a set of functions to obtain
performance information on the mainframe.  Basically, it was introduced
with System z10 years ago for the z/Architecture, that means, 64-bit.
For Linux, there are two facilities of interest, counter facility and sampling
facility.  The counter facility provides hardware counters for instructions,
cycles, crypto-activities, and many more.

The sampling facility is a hardware sampler that when started will write
samples at a particular interval into a sampling buffer.  At some point,
for example, if a sample block is full, it generates an interrupt to collect
samples (while the sampler continues to run).

Few years ago, I started to provide the a perf PMU to use the counter
and sampling facilities.  Recently, the device driver was updated to also
"export" the sampling buffer into the AUX area.  Thomas now completed the
related perf work to interpret and process these AUX data.

If people are more interested in the sampling facility, they can have a
look into:

- The Load-Program-Parameter and the CPU-Measurement Facilities, SA23-2260-05
  http://www-01.ibm.com/support/docview.wss?uid=isg26fcd1cc32246f4c8852574ce0044734a

and to learn how-to use it for Linux on Z, have look at chapter 54,
"Using the CPU-measurement facilities" in the:

- Device Drivers, Features, and Commands, SC33-8411-34
  http://public.dhe.ibm.com/software/dw/linux390/docu/l416dd34.pdf

=============================================================================

Signed-off-by: Thomas Richter <tmricht@linux.ibm.com>
Reviewed-by: Hendrik Brueckner <brueckner@linux.ibm.com>
Link: http://lkml.kernel.org/r/20180803100758.GA28475@linux.ibm.com
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Link: http://lkml.kernel.org/r/20180802074622.13641-2-tmricht@linux.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2018-08-03 10:34:18 -03:00
Adrian Hunter b818ec613b perf auxtrace: Add missing parameters from kernel-doc comments
Add missing parameters from kernel-doc comments.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/r/1520327598-1317-4-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2018-03-07 10:22:26 -03:00
Kim Phillips ffd3d18c20 perf tools: Add ARM Statistical Profiling Extensions (SPE) support
'perf record' and 'perf report --dump-raw-trace' supported in this
release.

Example usage:

 # perf record -e arm_spe/ts_enable=1,pa_enable=1/ dd if=/dev/zero of=/dev/null count=10000
 # perf report --dump-raw-trace

Note that the perf.data file is portable, so the report can be run on
another architecture host if necessary.

Output will contain raw SPE data and its textual representation, such
as:

0x5c8 [0x30]: PERF_RECORD_AUXTRACE size: 0x200000  offset: 0  ref: 0x1891ad0e  idx: 1  tid: 2227  cpu: 1
.
. ... ARM SPE data: size 2097152 bytes
.  00000000:  49 00                                           LD
.  00000002:  b2 c0 3b 29 0f 00 00 ff ff                      VA 0xffff00000f293bc0
.  0000000b:  b3 c0 eb 24 fb 00 00 00 80                      PA 0xfb24ebc0 ns=1
.  00000014:  9a 00 00                                        LAT 0 XLAT
.  00000017:  42 16                                           EV RETIRED L1D-ACCESS TLB-ACCESS
.  00000019:  b0 00 c4 15 08 00 00 ff ff                      PC 0xff00000815c400 el3 ns=1
.  00000022:  98 00 00                                        LAT 0 TOT
.  00000025:  71 36 6c 21 2c 09 00 00 00                      TS 39395093558
.  0000002e:  49 00                                           LD
.  00000030:  b2 80 3c 29 0f 00 00 ff ff                      VA 0xffff00000f293c80
.  00000039:  b3 80 ec 24 fb 00 00 00 80                      PA 0xfb24ec80 ns=1
.  00000042:  9a 00 00                                        LAT 0 XLAT
.  00000045:  42 16                                           EV RETIRED L1D-ACCESS TLB-ACCESS
.  00000047:  b0 f4 11 16 08 00 00 ff ff                      PC 0xff0000081611f4 el3 ns=1
.  00000050:  98 00 00                                        LAT 0 TOT
.  00000053:  71 36 6c 21 2c 09 00 00 00                      TS 39395093558
.  0000005c:  48 00                                           INSN-OTHER
.  0000005e:  42 02                                           EV RETIRED
.  00000060:  b0 2c ef 7f 08 00 00 ff ff                      PC 0xff0000087fef2c el3 ns=1
.  00000069:  98 00 00                                        LAT 0 TOT
.  0000006c:  71 d1 6f 21 2c 09 00 00 00                      TS 39395094481
...

Other release notes:

- applies to acme's perf/{core,urgent} branches, likely elsewhere

- Report is self-contained within the tool.
  Record requires enabling the kernel SPE driver by
  setting CONFIG_ARM_SPE_PMU.

- The intel-bts implementation was used as a starting point; its
  min/default/max buffer sizes and power of 2 pages granularity need to be
  revisited for ARM SPE

- Recording across multiple SPE clusters/domains not supported

- Snapshot support (record -S), and conversion to native perf events
  (e.g., via 'perf inject --itrace'), are also not supported

- Technically both cs-etm and spe can be used simultaneously, however
  disabled for simplicity in this release

Signed-off-by: Kim Phillips <kim.phillips@arm.com>
Reviewed-by: Dongjiu Geng <gengdongjiu@huawei.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: linux-arm-kernel@lists.infradead.org
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Pawel Moll <pawel.moll@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rob Herring <robh@kernel.org>
Cc: Suzuki Poulouse <suzuki.poulose@arm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Wang Nan <wangnan0@huawei.com>
Cc: Will Deacon <will.deacon@arm.com>
Link: http://lkml.kernel.org/r/20180114132850.0b127434b704a26bad13268f@arm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2018-01-17 10:23:31 -03:00
Mark Rutland 6aa7de0591 locking/atomics: COCCINELLE/treewide: Convert trivial ACCESS_ONCE() patterns to READ_ONCE()/WRITE_ONCE()
Please do not apply this to mainline directly, instead please re-run the
coccinelle script shown below and apply its output.

For several reasons, it is desirable to use {READ,WRITE}_ONCE() in
preference to ACCESS_ONCE(), and new code is expected to use one of the
former. So far, there's been no reason to change most existing uses of
ACCESS_ONCE(), as these aren't harmful, and changing them results in
churn.

However, for some features, the read/write distinction is critical to
correct operation. To distinguish these cases, separate read/write
accessors must be used. This patch migrates (most) remaining
ACCESS_ONCE() instances to {READ,WRITE}_ONCE(), using the following
coccinelle script:

----
// Convert trivial ACCESS_ONCE() uses to equivalent READ_ONCE() and
// WRITE_ONCE()

// $ make coccicheck COCCI=/home/mark/once.cocci SPFLAGS="--include-headers" MODE=patch

virtual patch

@ depends on patch @
expression E1, E2;
@@

- ACCESS_ONCE(E1) = E2
+ WRITE_ONCE(E1, E2)

@ depends on patch @
expression E;
@@

- ACCESS_ONCE(E)
+ READ_ONCE(E)
----

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: davem@davemloft.net
Cc: linux-arch@vger.kernel.org
Cc: mpe@ellerman.id.au
Cc: shuah@kernel.org
Cc: snitzer@redhat.com
Cc: thor.thayer@linux.intel.com
Cc: tj@kernel.org
Cc: viro@zeniv.linux.org.uk
Cc: will.deacon@arm.com
Link: http://lkml.kernel.org/r/1508792849-3115-19-git-send-email-paulmck@linux.vnet.ibm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-10-25 11:01:08 +02:00
Adrian Hunter 644e0840ad perf auxtrace: Add CPU filter support
Decoding auxtrace data can take a long time. To avoid decoding
unnecessarily, filter auxtrace data that is collected per-cpu before it is
decoded.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Link: http://lkml.kernel.org/r/1495786658-18063-38-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-06-30 11:50:55 -03:00
Adrian Hunter 70d110d775 perf auxtrace: Add itrace option to output power events
Add itrace option to output power events.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Link: http://lkml.kernel.org/r/1495786658-18063-25-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-06-27 12:09:58 -03:00
Adrian Hunter 3bdafdffa9 perf auxtrace: Add itrace option to output ptwrite events
Add itrace option to output ptwrite events.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Link: http://lkml.kernel.org/r/1495786658-18063-24-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-06-27 12:09:20 -03:00
Arnaldo Carvalho de Melo a43783aeec perf tools: Include errno.h where needed
Removing it from util.h, part of an effort to disentangle the includes
hell, that makes changes to util.h or something included by it to cause
a complete rebuild of the tools.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-ztrjy52q1rqcchuy3rubfgt2@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-04-19 13:01:51 -03:00
Adrian Hunter 1b36c03e35 perf record: Add support for using symbols in address filters
Symbols come from either the DSO or /proc/kallsyms for the kernel.
Details of the functionality can be found in Documentation/perf-record.txt.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: http://lkml.kernel.org/r/1474641528-18776-8-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-09-29 11:17:02 -03:00
Mathieu Poirier a818c563ae perf tools: Add coresight etm PMU record capabilities
Coresight ETMs are IP blocks used to perform HW assisted tracing on a
CPU core.  This patch introduce the required auxiliary API functions
allowing the perf core to interact with a tracer.

Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: linux-arm-kernel@lists.infradead.org
Link: http://lkml.kernel.org/r/1474041004-13956-4-git-send-email-mathieu.poirier@linaro.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-09-22 12:19:40 -03:00
Adrian Hunter 50f736372d perf auxtrace: Add option to feed branches to the thread stack
In preparation for using the thread stack to print an indent
representing the stack depth in perf script, add an option to tell
decoders to feed branches to the thread stack. Add support for that
option to Intel PT and Intel BTS.

The advantage of using the decoder to feed the thread stack is that it
happens before branch filtering and so can be used with different itrace
options (e.g. it still works when only showing calls, even though the
thread stack needs to see calls and returns). Also it does not conflict
with using the thread stack to get callchains.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Acked-by: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/r/1466689258-28493-3-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-06-23 17:02:59 -03:00
Andi Kleen d1706b39f0 perf tools: Add support for skipping itrace instructions
When using 'perf script' to look at PT traces it is often useful to
ignore the initialization code at the beginning.

On larger traces which may have many millions of instructions in
initialization code doing that in a pipeline can be very slow, with perf
script spending a lot of CPU time calling printf and writing data.

This patch adds an extension to the --itrace argument that skips 'n'
events (instructions, branches or transactions) at the beginning. This
is much more efficient.

v2:
Add support for BTS (Adrian Hunter)
Document in itrace.txt
Fix branch check
Check transactions and instructions too

Committer note:

To test intel_pt one needs to make sure VT-x isn't active, i.e.
stopping KVM guests on the test machine, as described by Andi Kleen
at http://lkml.kernel.org/r/20160301234953.GD23621@tassilo.jf.intel.com

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1459187142-20035-1-git-send-email-andi@firstfloor.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-03-30 11:14:09 -03:00
Arnaldo Carvalho de Melo b8f8eb84f4 perf tools: Remove misplaced __maybe_unused
All over the tree.

Cc: David Ahern <dsahern@gmail.com>
cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Ravi Bangoria <ravi.bangoria@linux.vnet.ibm.com>
Link: http://lkml.kernel.org/n/tip-8nzhnokxyp8y4v7gf0j00oyb@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-03-23 12:03:04 -03:00
Mathieu Poirier 14a05e13a0 perf auxtrace: Add perf_evlist pointer to *info_priv_size()
On some architecture the size of the private header may be dependent on
the number of tracers used in the session.  As such adding a "struct
perf_evlist *" parameter, which should contain all the required
information.

Also adjusting the existing client of the interface to take the new
parameter into account.

Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Al Grant <al.grant@arm.com>
Cc: Chunyan Zhang <zhang.chunyan@linaro.org>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-doc@vger.kernel.org
Cc: Mike Leach <mike.leach@arm.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Rabin Vincent <rabin@rab.in>
Cc: Tor Jeremiassen <tor@ti.com>
Link: http://lkml.kernel.org/r/1452807977-8069-22-git-send-email-mathieu.poirier@linaro.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-01-29 17:14:30 -03:00
Adrian Hunter 601897b54c perf auxtrace: Add option to synthesize branch stacks on samples
Add AUX area tracing option 'l' to synthesize branch stacks on samples
just like sample type PERF_SAMPLE_BRANCH_STACK.  This is taken into use
by Intel PT in a subsequent patch.

Based-on-patch-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/r/1443186956-18718-9-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-09-28 16:53:44 -03:00
Adrian Hunter d0170af700 perf tools: Add Intel BTS support
Intel BTS support fits within the new auxtrace infrastructure.  Recording is
supporting by identifying the Intel BTS PMU, parsing options and setting up
events.

Decoding is supported by queuing up trace data by thread and then decoding
synchronously delivering synthesized event samples into the session processing
for tools to consume.

Committer note:

E.g:

  [root@felicio ~]# perf record --per-thread -e intel_bts// ls
  anaconda-ks.cfg  apctest.output  bin  kernel-rt-3.10.0-298.rt56.171.el7.x86_64.rpm  libexec  lock_page.bpf.c  perf.data  perf.data.old
  [ perf record: Woken up 3 times to write data ]
  [ perf record: Captured and wrote 4.367 MB perf.data ]
  [root@felicio ~]# perf evlist -v
  intel_bts//: type: 6, size: 112, { sample_period, sample_freq }: 1, sample_type: IP|TID|IDENTIFIER, read_format: ID, disabled: 1, enable_on_exec: 1, sample_id_all: 1, exclude_guest: 1
  dummy:u: type: 1, size: 112, config: 0x9, { sample_period, sample_freq }: 1, sample_type: IP|TID|IDENTIFIER, read_format: ID, disabled: 1, exclude_kernel: 1, exclude_hv: 1, mmap: 1, comm: 1, enable_on_exec: 1, task: 1, sample_id_all: 1, mmap2: 1, comm_exec: 1
  [root@felicio ~]# perf script # the navigate in the pager to some interesting place:
    ls 1843 1 branches: ffffffff810a60cb flush_signal_handlers ([kernel.kallsyms]) => ffffffff8121a522 setup_new_exec ([kernel.kallsyms])
    ls 1843 1 branches: ffffffff8121a529 setup_new_exec ([kernel.kallsyms]) => ffffffff8122fa30 do_close_on_exec ([kernel.kallsyms])
    ls 1843 1 branches: ffffffff8122fa5d do_close_on_exec ([kernel.kallsyms]) => ffffffff81767ae0 _raw_spin_lock ([kernel.kallsyms])
    ls 1843 1 branches: ffffffff81767af4 _raw_spin_lock ([kernel.kallsyms]) => ffffffff8122fa62 do_close_on_exec ([kernel.kallsyms])
    ls 1843 1 branches: ffffffff8122fa8e do_close_on_exec ([kernel.kallsyms]) => ffffffff8122faf0 do_close_on_exec ([kernel.kallsyms])
    ls 1843 1 branches: ffffffff8122faf7 do_close_on_exec ([kernel.kallsyms]) => ffffffff8122fa8b do_close_on_exec ([kernel.kallsyms])
    ls 1843 1 branches: ffffffff8122fa8e do_close_on_exec ([kernel.kallsyms]) => ffffffff8122faf0 do_close_on_exec ([kernel.kallsyms])
    ls 1843 1 branches: ffffffff8122faf7 do_close_on_exec ([kernel.kallsyms]) => ffffffff8122fa8b do_close_on_exec ([kernel.kallsyms])
    ls 1843 1 branches: ffffffff8122fa8e do_close_on_exec ([kernel.kallsyms]) => ffffffff8122faf0 do_close_on_exec ([kernel.kallsyms])
    ls 1843 1 branches: ffffffff8122faf7 do_close_on_exec ([kernel.kallsyms]) => ffffffff8122fa8b do_close_on_exec ([kernel.kallsyms])
    ls 1843 1 branches: ffffffff8122fa8e do_close_on_exec ([kernel.kallsyms]) => ffffffff8122faf0 do_close_on_exec ([kernel.kallsyms])
    ls 1843 1 branches: ffffffff8122faf7 do_close_on_exec ([kernel.kallsyms]) => ffffffff8122fa8b do_close_on_exec ([kernel.kallsyms])
    ls 1843 1 branches: ffffffff8122fa8e do_close_on_exec ([kernel.kallsyms]) => ffffffff8122faf0 do_close_on_exec ([kernel.kallsyms])
    ls 1843 1 branches: ffffffff8122faf7 do_close_on_exec ([kernel.kallsyms]) => ffffffff8122fa8b do_close_on_exec ([kernel.kallsyms])
    ls 1843 1 branches: ffffffff8122fa8e do_close_on_exec ([kernel.kallsyms]) => ffffffff8122faf0 do_close_on_exec ([kernel.kallsyms])
    ls 1843 1 branches: ffffffff8122faf7 do_close_on_exec ([kernel.kallsyms]) => ffffffff8122fa8b do_close_on_exec ([kernel.kallsyms])
    ls 1843 1 branches: ffffffff8122fac9 do_close_on_exec ([kernel.kallsyms]) => ffffffff8122fad2 do_close_on_exec ([kernel.kallsyms])
    ls 1843 1 branches: ffffffff8122fadd do_close_on_exec ([kernel.kallsyms]) => ffffffff8120fc80 filp_close ([kernel.kallsyms])
    ls 1843 1 branches: ffffffff8120fcaf filp_close ([kernel.kallsyms]) => ffffffff8120fcb6 filp_close ([kernel.kallsyms])
    ls 1843 1 branches: ffffffff8120fcc2 filp_close ([kernel.kallsyms]) => ffffffff812547f0 dnotify_flush ([kernel.kallsyms])
    ls 1843 1 branches: ffffffff81254823 dnotify_flush ([kernel.kallsyms]) => ffffffff8120fcc7 filp_close ([kernel.kallsyms])
    ls 1843 1 branches: ffffffff8120fccd filp_close ([kernel.kallsyms]) => ffffffff81261790 locks_remove_posix ([kernel.kallsyms])
    ls 1843 1 branches: ffffffff812617a3 locks_remove_posix ([kernel.kallsyms]) => ffffffff812617b9 locks_remove_posix ([kernel.kallsyms])
    ls 1843 1 branches: ffffffff812617b9 locks_remove_posix ([kernel.kallsyms]) => ffffffff8120fcd2 filp_close ([kernel.kallsyms])
    ls 1843 1 branches: ffffffff8120fcd5 filp_close ([kernel.kallsyms]) => ffffffff812142c0 fput ([kernel.kallsyms])
    ls 1843 1 branches: ffffffff812142d6 fput ([kernel.kallsyms]) => ffffffff812142df fput ([kernel.kallsyms])
    ls 1843 1 branches: ffffffff8121430c fput ([kernel.kallsyms]) => ffffffff810b6580 task_work_add ([kernel.kallsyms])
    ls 1843 1 branches: ffffffff810b65ad task_work_add ([kernel.kallsyms]) => ffffffff810b65b1 task_work_add ([kernel.kallsyms])
    ls 1843 1 branches: ffffffff810b65c1 task_work_add ([kernel.kallsyms]) => ffffffff810bc710 kick_process ([kernel.kallsyms])
    ls 1843 1 branches: ffffffff810bc725 kick_process ([kernel.kallsyms]) => ffffffff810bc742 kick_process ([kernel.kallsyms])
    ls 1843 1 branches: ffffffff810bc742 kick_process ([kernel.kallsyms]) => ffffffff810b65c6 task_work_add ([kernel.kallsyms])
    ls 1843 1 branches: ffffffff810b65c9 task_work_add ([kernel.kallsyms]) => ffffffff81214311 fput ([kernel.kallsyms])

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/r/1437150840-31811-9-git-send-email-adrian.hunter@intel.com
[ Merged sample->time fix for bug found after first round of testing on slightly older kernel ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-08-21 11:34:10 -03:00
Adrian Hunter 55ea4ab426 perf auxtrace: Add Intel PT as an AUX area tracing type
Add the Intel Processor Trace type constant PERF_AUXTRACE_INTEL_PT.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/r/1437150840-31811-2-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-08-17 11:11:36 -03:00
Adrian Hunter 83b2ea257e perf tools: Allow auxtrace data alignment
Allow auxtrace data to be a multiple of something other than page size.
That is needed for BTS where the buffer contains 24-byte records.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/r/1432906425-9911-11-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-06-23 18:28:37 -03:00
Adrian Hunter 2dd6d8a10a perf record: Add AUX area tracing Snapshot Mode support
Add a new option and support for Instruction Tracing Snapshot Mode.
When the new option is selected, no AUX area tracing data is captured
until a signal (SIGUSR2) is received.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1430404667-10593-10-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-05-05 18:13:01 -03:00
Adrian Hunter d20031bb63 perf tools: Add AUX area tracing Snapshot Mode
Add support for making snapshots of AUX area tracing data.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1430404667-10593-9-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-05-05 18:13:00 -03:00
Adrian Hunter 53c76b0e9e perf auxtrace: Add option to synthesize events for transactions
Add AUX area tracing option 'x' to synthesize events for transactions.
This will be used by Intel PT to synthesize an event record for each TSX
start, commit or abort.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1430404667-10593-6-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-05-05 18:12:55 -03:00
Adrian Hunter e31f0d017e perf tools: Add build option NO_AUXTRACE to exclude AUX area tracing
Add build option NO_AUXTRACE to exclude compiling support for AUX area
tracing. Support for both recording and processing is excluded and by
implication any future additions such as Intel PT and Intel BTS will
also not be compiled in with this option.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1430404667-10593-5-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-05-05 18:12:53 -03:00
Adrian Hunter 99fa298453 perf tools: Add AUX area tracing index
Add an index of AUX area tracing events within a perf.data file.

perf record uses a special user event PERF_RECORD_FINISHED_ROUND to
enable sorting of events in chunks instead of having to sort all events
altogether.

AUX area tracing events contain data that can span back to the very
beginning of the recording period. i.e. they do not obey the rules of
PERF_RECORD_FINISHED_ROUND.

By adding an index, AUX area tracing events can be found in advance and
the PERF_RECORD_FINISHED_ROUND approach works as usual.

The index is recorded with the auxtrace feature in the perf.data file.
A session reads the index but does not process it.  An AUX area decoder
can queue all the AUX area data in advance using
auxtrace_queues__process_index() or otherwise process the index in some
custom manner.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1430404667-10593-3-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-05-04 19:48:47 -03:00
Adrian Hunter c3278f0231 perf auxtrace: Add a hashtable for caching
Decoding AUX area data may involve walking object code.  Rather than
repetitively decoding the same instructions, a cache can be used to
cache the results.

This patch implements a fairly generic hashtable with a 32-bit key that
could be used for other purposes as well.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1428594864-29309-15-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-04-29 10:37:55 -03:00
Adrian Hunter 73f75fb1bd perf auxtrace: Add processing for AUX area tracing events
Provide hooks so that an AUX area decoder can process AUX area tracing
events.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1428594864-29309-14-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-04-29 10:37:55 -03:00
Adrian Hunter f939715586 perf auxtrace: Add a heap for sorting AUX area tracing queues
In order to process AUX area tracing data in time order, the queue with
data with the lowest timestamp must be processed first.  Provide a heap
to keep track of which queue that is.

As with the queues, a decoder does not have to use the heap, but Intel
BTS and Intel PT will use it.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1428594864-29309-13-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-04-29 10:37:54 -03:00
Adrian Hunter e502789302 perf auxtrace: Add helpers for queuing AUX area tracing data
Provide functions to queue AUX area tracing data buffers for processing.
A AUX area decoder need not use the queues, however Intel BTS and Intel
PT will use them.

There is one queue for each of the mmap buffers that were used for
recording.  Because those mmaps were associated with per-cpu or
per-thread contexts, the data is time-ordered with respect to those
contexts.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1429608111-18160-1-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-04-29 10:37:54 -03:00
Adrian Hunter 85ed47299e perf auxtrace: Add helpers for AUX area tracing errors
Add functions to synthesize, count and print AUX area tracing error
events.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1428594864-29309-11-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-04-29 10:37:53 -03:00
Adrian Hunter f6986c95af perf session: Add instruction tracing options
It is assumed that AUX area decoding will synthesize events for
consumption by other tools.

At this time, the main use of AUX area tracing will be to capture
instruction trace (aka processor trace) data.

The nature of instruction tracing suggests the initial inclusion of
options for "instructions" and "branches" events, but more could be
added as needed.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1428594864-29309-10-git-send-email-adrian.hunter@intel.com
[ Added ref to tools/perf/Documentation/perf-script.txt describing what is parsed ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-04-29 10:37:53 -03:00
Adrian Hunter c446870d80 perf session: Add hooks to allow transparent decoding of AUX area tracing data
Hook into session processing so that AUX area decoding can synthesize
events transparently to the tools.

The advantages of transparent decoding are that tools can be used
directly with perf.data files containing AUX area tracing data, which is
easier for the user and more efficient than having a separate decoding
tool.

This will work as follows:

1. Tools will feed auxtrace events to the decoder using
   perf_tool->auxtrace() (support for that still to come).

2. The decoder can process side-band events as needed due
   to the auxtrace->process_event() hook.

3. The decoder can deliver synthesized events into the
   event stream using perf_session__deliver_synth_event().

Note the expectation is that decoding will work on data that is
time-ordered with respect to the per-cpu or per-thread contexts that
were recorded.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1428594864-29309-9-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-04-29 10:37:53 -03:00
Adrian Hunter 9e0cc4fe37 perf auxtrace: Add support for AUX area recording
Add support for reading from the AUX area tracing mmap and synthesizing
AUX area tracing events.

This patch introduces an abstraction for recording AUX area data.

Recording is initialized by auxtrace_record__init() which is a weak
function to be implemented by the architecture to provide recording
callbacks.

Recording is mainly handled by auxtrace_mmap__read() and
perf_event__synthesize_auxtrace() but there are callbacks for
miscellaneous needs including validating and processing user options,
populating private data in auxtrace_info_event, and freeing the
structure when finished.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1428594864-29309-5-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-04-29 10:37:51 -03:00
Adrian Hunter 718c602d67 perf evlist: Add support for mmapping an AUX area buffer
This patch supports the addition to the kernel of AUX area buffers that
can be mmapped separately from the perf-events buffer.

The AUX buffer can be configured to contain hardware-produced trace
information. The first implementation will support Intel BTS and Intel
PT.

One auxtrace buffer is mmapped per perf-events buffer.  If the requested
auxtrace buffer size is zero, which it will be until further support is
added, then no auxtrace mmapping is attempted.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1428594864-29309-3-git-send-email-adrian.hunter@intel.com
[ Fixed conflict in evlist.h ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-04-29 10:37:50 -03:00