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linux/tools/perf/Documentation
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Namhyung Kim 79a3371bdf perf bench sched pipe: Add -G/--cgroups option 
The -G/--cgroups option is to put sender and receiver in different
cgroups in order to measure cgroup context switch overheads.

Users need to make sure the cgroups exist and accessible.  The following
example should the effect of this change.  Please don't forget taskset
before the perf bench to measure cgroup switches properly.  Otherwise
each task would run on a different CPU and generate cgroup switches
regardless of this change.

  # perf stat -e context-switches,cgroup-switches \
  > taskset -c 0 perf bench sched pipe -l 10000 > /dev/null

   Performance counter stats for 'taskset -c 0 perf bench sched pipe -l 10000':

              20,001      context-switches
                   2      cgroup-switches

         0.053449651 seconds time elapsed

         0.011286000 seconds user
         0.041869000 seconds sys

  # perf stat -e context-switches,cgroup-switches \
  > taskset -c 0 perf bench sched pipe -l 10000 -G AAA,BBB > /dev/null

   Performance counter stats for 'taskset -c 0 perf bench sched pipe -l 10000 -G AAA,BBB':

              20,001      context-switches
              20,001      cgroup-switches

         0.052768627 seconds time elapsed

         0.006284000 seconds user
         0.046266000 seconds sys

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Link: https://lore.kernel.org/r/20231017202342.1353124-1-namhyung@kernel.org
2023-10-25 10:02:10 -07:00
..
android.txt perf tools: Update android build documentation 2016-07-04 20:27:27 -03:00
arm-coresight.txt perf docs: Fix man page build wrt perf-arm-coresight.txt 2022-10-25 17:40:48 -03:00
asciidoc.conf perf docs: Allow man page date to be specified 2019-09-27 09:26:14 -03:00
asciidoctor-extensions.rb perf Documentation: Support for asciidoctor 2018-04-26 13:47:10 -03:00
build-docdep.perl perf doc: Fix doc.dep 2021-08-02 09:56:17 -03:00
build-xed.txt perf script: Add --insn-trace for instruction decoding 2018-10-24 15:29:50 -03:00
Build.txt perf tools: Add doc about how to build perf with Asan and UBSan 2019-03-19 16:52:04 -03:00
callchain-overhead-calculation.txt perf tools: Document --children option in more detail 2015-04-29 10:38:06 -03:00
cat-texi.perl perf doc: Fix perfman.info build 2021-08-02 09:56:17 -03:00
db-export.txt perf db-export: Add brief documentation 2019-06-05 09:47:57 -03:00
examples.txt perf tools: Replace lkml.org links with lore 2021-02-11 12:54:27 -03:00
guest-files.txt perf tools: Tidy guest option documentation 2022-08-11 18:50:17 -03:00
guestmount.txt perf tools: Tidy guest option documentation 2022-08-11 18:50:17 -03:00
intel-bts.txt perf tools: Add Intel BTS support 2015-08-21 11:34:10 -03:00
intel-hybrid.txt perf record: Fix manpage formatting of description of support to hybrid systems 2022-08-27 11:55:17 -03:00
intel-pt.txt perf intel-pt: Update intel-pt.txt file with new location of the documentation 2020-03-11 11:00:33 -03:00
itrace.txt perf intel-pt: Synthesize cycle events 2023-02-17 11:02:44 -03:00
jit-interface.txt
jitdump-specification.txt perf doc: Fix typos all over the place 2021-09-27 09:32:28 -03:00
Makefile perf doc: Add support for KBUILD_BUILD_TIMESTAMP 2023-05-15 17:49:01 -03:00
manpage-1.72.xsl
manpage-base.xsl
manpage-bold-literal.xsl
manpage-normal.xsl
manpage-suppress-sp.xsl
perf-annotate.txt perf symbol: Add command line support for addr2line path 2023-04-04 09:39:56 -03:00
perf-archive.txt
perf-arm-spe.txt perf docs: Add man page entry for Arm SPE 2022-04-14 08:54:03 -03:00
perf-bench.txt perf bench sched pipe: Add -G/--cgroups option 2023-10-25 10:02:10 -07:00
perf-buildid-cache.txt perf record: Disable debuginfod by default 2022-01-15 17:41:25 -03:00
perf-buildid-list.txt perf buildid-list: Add a "-m" option to show kernel and modules build-ids 2022-07-18 16:35:34 -03:00
perf-c2c.txt perf c2c: Add report option to show false sharing in adjacent cachelines 2023-02-16 09:33:45 -03:00
perf-config.txt perf parse-events: Remove BPF event support 2023-08-15 16:41:48 -03:00
perf-daemon.txt perf daemon: Add examples to man page 2021-02-11 10:19:52 -03:00
perf-data.txt perf data: Add JSON export 2021-04-29 10:30:58 -03:00
perf-diff.txt perf tools: Make quiet mode consistent between tools 2022-10-27 16:37:26 -03:00
perf-dlfilter.txt perf dlfilter: Add al_cleanup() 2023-08-15 16:41:49 -03:00
perf-evlist.txt perf tools: Fix documentation of verbose options 2021-03-06 16:54:26 -03:00
perf-ftrace.txt perf docs: Fix format of unordered lists 2023-08-16 08:37:49 -03:00
perf-help.txt
perf-inject.txt perf inject: Clarify build-id options a little bit 2022-10-04 08:55:22 -03:00
perf-intel-pt.txt perf intel-pt: Synthesize cycle events 2023-02-17 11:02:44 -03:00
perf-iostat.txt perf docs: Fix accidental em-dashes 2021-08-10 11:05:21 -03:00
perf-kallsyms.txt perf tools: Fix documentation of verbose options 2021-03-06 16:54:26 -03:00
perf-kmem.txt perf kmem: Improve man page for record options 2021-10-08 16:10:02 -03:00
perf-kvm.txt perf kvm: Update documentation to reflect new changes 2023-03-15 16:53:43 -03:00
perf-kwork.txt perf kwork top: Implements BPF-based cpu usage statistics 2023-09-12 17:31:59 -03:00
perf-list.txt perf tools docs: Use canonical ftrace path 2023-02-02 16:32:19 -03:00
perf-lock.txt perf lock contention: Add -G/--cgroup-filter option 2023-09-12 17:32:00 -03:00
perf-mem.txt perf mem/c2c: Document that SPE is used for mem and c2c on ARM 2023-01-27 15:00:34 -03:00
perf-probe.txt perf docs: Fix a typo in 'perf probe' man page: l20th -> 120th 2023-01-19 09:49:59 -03:00
perf-record.txt perf record: Track sideband events for all CPUs when tracing selected CPUs 2023-09-12 17:31:43 -03:00
perf-report.txt perf symbol: Add command line support for addr2line path 2023-04-04 09:39:56 -03:00
perf-sched.txt perf sched timehist: Add support for filtering on CPU 2020-01-06 11:46:09 -03:00
perf-script-perl.txt perf tools docs: Use canonical ftrace path 2023-02-02 16:32:19 -03:00
perf-script-python.txt perf tools docs: Use canonical ftrace path 2023-02-02 16:32:19 -03:00
perf-script.txt perf script: Add new output field 'dsoff' to print dso offset 2023-05-12 15:21:49 -03:00
perf-stat.txt perf stat: Document --metric-no-threshold and threshold colors 2023-06-05 16:04:14 -03:00
perf-test.txt perf test: Add Symbols test 2023-01-22 18:09:56 -03:00
perf-timechart.txt perf timechart: Document missing --force option 2017-11-16 14:50:06 -03:00
perf-top.txt perf top: Add --branch-history option 2023-04-04 09:39:56 -03:00
perf-trace.txt perf tools: Fix documentation of verbose options 2021-03-06 16:54:26 -03:00
perf-version.txt perf version: Add man page 2018-04-02 13:52:23 -03:00
perf.data-directory-format.txt perf record: Put a copy of kcore into the perf.data directory 2019-11-06 15:43:05 -03:00
perf.data-file-format.txt perf doc: Fix typo in perf.data-file-format.txt 2023-07-28 19:01:16 -03:00
perf.txt perf docs: Add man page entry for Arm SPE 2022-04-14 08:54:03 -03:00
perfconfig.example perf config: Show default report configuration in example and docs 2016-09-01 09:44:13 -03:00
security.txt perf docs: Introduce security.txt file to document related issues 2020-05-28 10:03:26 -03:00
tips.txt perf tools: Fix typos / broken sentences 2019-07-02 16:08:16 -03:00
topdown.txt perf doc: Refresh topdown documentation 2023-02-19 08:10:15 -03:00