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OpenCloudOS-Kernel/tools/perf/util
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Greg Price b21484f1a1 perf report/top: Add option to collapse undesired parts of call graph 
For example, in an application with an expensive function implemented
with deeply nested recursive calls, the default call-graph presentation
is dominated by the different callchains within that function.  By
ignoring these callees, we can collect the callchains leading into the
function and compactly identify what to blame for expensive calls.

For example, in this report the callers of garbage_collect() are
scattered across the tree:

  $ perf report -d ruby 2>- | grep -m10 ^[^#]*[a-z]
      22.03%     ruby  [.] gc_mark
                 --- gc_mark
                    |--59.40%-- mark_keyvalue
                    |          st_foreach
                    |          gc_mark_children
                    |          |--99.75%-- rb_gc_mark
                    |          |          rb_vm_mark
                    |          |          gc_mark_children
                    |          |          gc_marks
                    |          |          |--99.00%-- garbage_collect

If we ignore the callees of garbage_collect(), its callers are coalesced:

  $ perf report --ignore-callees garbage_collect -d ruby 2>- | grep -m10 ^[^#]*[a-z]
      72.92%     ruby  [.] garbage_collect
                 --- garbage_collect
                     vm_xmalloc
                    |--47.08%-- ruby_xmalloc
                    |          st_insert2
                    |          rb_hash_aset
                    |          |--98.45%-- features_index_add
                    |          |          rb_provide_feature
                    |          |          rb_require_safe
                    |          |          vm_call_method

Signed-off-by: Greg Price <price@mit.edu>
Tested-by: Jiri Olsa <jolsa@redhat.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/20130623031720.GW22203@biohazard-cafe.mit.edu
Link: http://lkml.kernel.org/r/20130708115746.GO22203@biohazard-cafe.mit.edu
Cc: Fengguang Wu <fengguang.wu@intel.com>
[ remove spaces at beginning of line, reported by Fengguang Wu ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
 		2013-07-12 13:53:55 -03:00
..
include perf tools: Default to cpu// for events v5 2013-07-12 13:53:52 -03:00
scripting-engines perf script: hook up perf_scripting_context->pevent 2013-01-24 16:40:52 -03:00
PERF-VERSION-GEN perf tools: Fix perf version generation 2013-07-08 18:09:52 -03:00
abspath.c perf tools: Remove some unused functions 2010-05-18 23:03:35 -03:00
alias.c perf tools: Use __maybe_used for unused variables 2012-09-11 12:19:15 -03:00
annotate.c perf annotate browser: Use disasm__calc_percent() 2013-03-15 13:06:06 -03:00
annotate.h perf tools: Remove dependency on libnewt 2013-04-01 12:23:21 -03:00
bitmap.c perf tools: Add bitmap_or function into bitmap object 2012-02-13 23:28:10 -02:00
build-id.c perf tools: Move build_id__sprintf into build-id object 2012-10-29 11:34:46 -02:00
build-id.h perf tools: Move BUILD_ID_SIZE into build-id object 2012-10-29 11:35:32 -02:00
cache.h perf ui: Always compile browser setup code 2012-11-14 16:53:03 -03:00
callchain.c perf tools: Fix calloc argument ordering 2013-02-06 18:09:28 -03:00
callchain.h perf record: Export the callchain parsing routine and help 2012-12-11 17:22:14 -03:00
cgroup.c perf tools: Use __maybe_used for unused variables 2012-09-11 12:19:15 -03:00
cgroup.h perf tool: Add cgroup support 2011-02-16 13:30:48 +01:00
color.c perf tools: Use scnprintf where applicable 2012-03-14 12:36:19 -03:00
color.h perf hist: Replace ->print() routines by ->snprintf() equivalents 2010-04-02 16:28:15 -03:00
config.c perf tools: Use __maybe_used for unused variables 2012-09-11 12:19:15 -03:00
cpumap.c perf stat: Add per-core aggregation 2013-03-25 16:13:26 -03:00
cpumap.h perf tools: Rename cpu_map__all() to cpu_map__empty() 2013-07-12 13:45:44 -03:00
ctype.c perf tools: ctype.c only wants util.h 2012-02-13 23:17:40 -02:00
debug.c perf tools: Fix TUI helpline output 2012-12-09 08:46:07 -03:00
debug.h perf evsel: Introduce perf_evsel__open_strerror method 2013-01-24 16:40:09 -03:00
dso.c perf symbols: Fix vdso list searching 2013-07-08 17:59:07 -03:00
dso.h perf symbols: Fix vdso list searching 2013-07-08 17:59:07 -03:00
dwarf-aux.c perf probe: Print an enum type variable in "enum variable-name" format when showing accessible variables 2012-09-27 10:58:57 -03:00
dwarf-aux.h perf probe: Search concrete out-of-line instances 2011-08-12 09:32:10 -03:00
environment.c
…
event.c perf tools: struct thread has a tid not a pid 2013-07-12 13:53:50 -03:00
event.h perf tools: Add mem access sampling core support 2013-04-01 12:20:13 -03:00
evlist.c perf evlist: Tidy duplicated munmap code 2013-07-12 13:52:54 -03:00
evlist.h perf evlist: Introduce perf_evlist__close() 2013-03-15 13:06:10 -03:00
evsel.c perf tools: Use default include path notation for libtraceevent headers 2013-07-12 13:45:54 -03:00
evsel.h perf stat: Introduce --repeat forever 2013-03-15 14:01:26 -03:00
exec_cmd.c perf tools: Makefile: Remove various and sundry cruft 2011-02-18 07:43:06 -02:00
exec_cmd.h perf tools: Remove some unused functions 2010-05-18 23:03:35 -03:00
generate-cmdlist.sh perf tools: Convert to LIBELF_SUPPORT 2012-09-28 21:07:36 -03:00
header.c perf tools: Fix missing tool parameter 2013-07-12 13:52:49 -03:00
header.h perf tools: Fix missing tool parameter 2013-07-12 13:52:49 -03:00
help.c perf tools: Use __maybe_used for unused variables 2012-09-11 12:19:15 -03:00
help.h perf tools: Protect header files with a consistent style 2009-09-24 21:27:51 +02:00
hist.c perf hists: Move locking to its call-sites 2013-05-28 16:24:00 +03:00
hist.h perf report: Add --percent-limit option 2013-05-28 16:24:01 +03:00
hweight.c perf tools: Don't use code surrounded by __KERNEL__ 2010-05-02 12:00:44 -03:00
intlist.c perf tools: Allow passing a list to intlist__new 2013-01-24 16:40:53 -03:00
intlist.h perf tools: Allow passing a list to intlist__new 2013-01-24 16:40:53 -03:00
levenshtein.c
…
levenshtein.h perf tools: Protect header files with a consistent style 2009-09-24 21:27:51 +02:00
machine.c perf report/top: Add option to collapse undesired parts of call graph 2013-07-12 13:53:55 -03:00
machine.h perf report/top: Add option to collapse undesired parts of call graph 2013-07-12 13:53:55 -03:00
map.c perf tools: Handle JITed code in shared memory 2013-05-28 16:23:58 +03:00
map.h perf tools: Stop using 'self' in map.[ch] 2013-01-25 12:49:28 -03:00
pager.c perf tools: Fix pager on minimal-install embedded systems 2012-05-30 15:10:39 -03:00
parse-events.c perf list: List kernel supplied event aliases 2013-07-12 13:53:53 -03:00
parse-events.h perf parse events: Demystify memory allocations 2013-07-12 13:52:05 -03:00
parse-events.l perf tools: Add basic event modifier sanity check 2012-11-14 16:52:24 -03:00
parse-events.y perf parse events: Demystify memory allocations 2013-07-12 13:52:05 -03:00
parse-options.c perf tools: Long option completion support for each subcommands 2012-10-02 18:36:44 -03:00
parse-options.h perf tools: Long option completion support for each subcommands 2012-10-02 18:36:44 -03:00
path.c perf tools: Convert to HAVE_STRLCPY 2012-10-02 18:36:24 -03:00
perf_regs.h perf tools: Convert to LIBUNWIND_SUPPORT 2012-10-02 17:56:01 -03:00
pmu.c perf list: List kernel supplied event aliases 2013-07-12 13:53:53 -03:00
pmu.h perf list: List kernel supplied event aliases 2013-07-12 13:53:53 -03:00
pmu.l perf tools: Add perf pmu object to access pmu format definition 2012-03-16 14:29:35 -03:00
pmu.y perf tools: Fix build with bison 2.3 and older. 2013-02-14 16:12:34 -03:00
probe-event.c perf tools: Introduce tools/lib/lk library 2013-03-15 13:06:00 -03:00
probe-event.h perf probe: Provide perf interface for uprobes 2012-05-11 13:58:17 -03:00
probe-finder.c perf probe: Allow of casting an array of char to string 2013-01-24 16:40:20 -03:00
probe-finder.h perf tools: Eliminate duplicate code and use PATH_MAX consistently 2011-11-28 10:11:04 -02:00
pstack.c perf tools: Stop using 'self' in pstack 2012-11-14 16:50:38 -03:00
pstack.h perf ui: Move hists browser to util/ui/browsers/ 2010-08-10 16:11:08 -03:00
python-ext-sources perf tools: Introduce tools/lib/lk library 2013-03-15 13:06:00 -03:00
python.c perf python: Fix breakage introduced by the test_attr infrastructure 2013-01-24 16:40:09 -03:00
quote.c perf tools: Remove some unused functions 2010-05-18 23:03:35 -03:00
quote.h perf tools: Remove some unused functions 2010-05-18 23:03:35 -03:00
rblist.c Account the nr_entries in rblist properly 2012-10-24 14:20:11 -02:00
rblist.h perf tools: Introducing rblist 2012-08-03 10:37:21 -03:00
run-command.c perf tools: Remove some unused functions 2010-05-18 23:03:35 -03:00
run-command.h perf tools: Remove some unused functions 2010-05-18 23:03:35 -03:00
session.c perf report/top: Add option to collapse undesired parts of call graph 2013-07-12 13:53:55 -03:00
session.h perf tools: Remove cwd from perf_session struct 2013-07-12 13:45:48 -03:00
setup.py perf tools: Merge all *CFLAGS* make variable into CFLAGS 2013-05-30 16:12:03 +03:00
sigchain.c perf tools: Remove some unused functions 2010-05-18 23:03:35 -03:00
sigchain.h perf tools: Remove some unused functions 2010-05-18 23:03:35 -03:00
sort.c perf report/top: Add option to collapse undesired parts of call graph 2013-07-12 13:53:55 -03:00
sort.h perf report/top: Add option to collapse undesired parts of call graph 2013-07-12 13:53:55 -03:00
stat.c perf stats: Fix divide by 0 in variance 2013-05-28 16:24:04 +03:00
stat.h perf stat: Move stats related code to util/stat.c 2012-09-17 13:10:03 -03:00
strbuf.c perf tools: Fix strbuf_addf() when the buffer needs to grow 2012-10-30 10:32:56 -02:00
strbuf.h perf tools: Remove some unused functions 2010-05-18 23:03:35 -03:00
strfilter.c perf: Fix missing strndup declaration 2011-03-04 01:17:18 +01:00
strfilter.h perf tools: Add strfilter for general purpose string filter 2011-01-28 09:19:38 -02:00
string.c perf tools: Default to cpu// for events v5 2013-07-12 13:53:52 -03:00
strlist.c perf probe: Fix segfault 2013-03-13 17:00:33 -03:00
strlist.h perf tools: Stop using 'self' in strlist 2013-01-25 12:49:28 -03:00
svghelper.c perf timechart: Fix black idle boxes in the title 2011-02-28 08:56:14 +01:00
svghelper.h perf tools: Protect header files with a consistent style 2009-09-24 21:27:51 +02:00
symbol-elf.c perf report: Add --no-demangle option 2013-03-26 16:38:21 -03:00
symbol-minimal.c perf symbols: Include elf.h header regardless LIBELF_SUPPORT 2013-01-24 16:40:18 -03:00
symbol.c perf tools: Fix -x/--exclude-other option for report command 2013-07-08 17:38:53 -03:00
symbol.h perf tools: Add mem access sampling core support 2013-04-01 12:20:13 -03:00
sysfs.c perf tools: Fix possible (unlikely) buffer overflow 2013-01-24 16:40:18 -03:00
sysfs.h perf tools: Add sysfs mountpoint interface 2012-02-13 23:27:15 -02:00
target.c perf tools: Replace mempcpy with memcpy 2012-09-05 19:35:21 -03:00
target.h perf target: Add uses_mmap field 2012-05-17 12:32:54 -03:00
thread.c perf tools: struct thread has a tid not a pid 2013-07-12 13:53:50 -03:00
thread.h perf tools: struct thread has a tid not a pid 2013-07-12 13:53:50 -03:00
thread_map.c perf tools: fix thread_map__new_by_pid_str() memory leak in error path 2012-05-25 11:40:59 -03:00
thread_map.h perf evlist: Add thread_map__nr() helper 2013-03-15 13:06:02 -03:00
tool.h perf tools: Fix missing tool parameter 2013-07-12 13:52:49 -03:00
top.c perf top: Fix percent output when no samples collected 2013-05-28 16:23:59 +03:00
top.h perf top: Add --percent-limit option 2013-05-28 16:24:01 +03:00
trace-event-info.c perf util: No need to call read_trace_init() in tracing_data_header() 2013-07-12 13:52:31 -03:00
trace-event-parse.c perf script: Adopt latency_format variable 2013-07-12 13:52:28 -03:00
trace-event-read.c perf util: Parse header_page to get proper long size 2013-07-12 13:52:24 -03:00
trace-event-scripting.c perf tools: Use __maybe_used for unused variables 2012-09-11 12:19:15 -03:00
trace-event.h perf util: Remove unused enum and macro in trace-event.h 2013-07-12 13:52:33 -03:00
types.h perf tools: Add union u64_swap type for swapping u64 data 2012-05-22 12:50:25 -03:00
unwind.c perf tools: Use __maybe_used for unused variables 2012-09-11 12:19:15 -03:00
unwind.h perf tools: Convert to LIBUNWIND_SUPPORT 2012-10-02 17:56:01 -03:00
usage.c perf target: Introduce perf_target__parse_uid() 2012-05-07 16:46:48 -03:00
util.c perf util: Move debugfs/tracing helper functions to util.c 2013-07-12 13:46:00 -03:00
util.h perf util: Move debugfs/tracing helper functions to util.c 2013-07-12 13:46:00 -03:00
values.c perf tools: Fix a memory leak on perf_read_values_destroy 2011-12-20 13:41:34 -02:00
values.h perf tools: Protect header files with a consistent style 2009-09-24 21:27:51 +02:00
vdso.c perf symbols: Fix vdso list searching 2013-07-08 17:59:07 -03:00
vdso.h perf tools: Back [vdso] DSO with real data 2012-09-11 12:08:30 -03:00
wrapper.c perf tools: Use __maybe_used for unused variables 2012-09-11 12:19:15 -03:00
xyarray.c perf tools: Introduce event selectors 2011-01-03 16:39:04 -02:00
xyarray.h perf tools: Introduce event selectors 2011-01-03 16:39:04 -02:00