android_kernel_asus_sm8350/perf at a1f3d56761df31f0ffeb215b974e26d5613e92a4 - android_kernel_asus_sm8350 - Gitea: Git with a cup of tea

android/android_kernel_asus_sm8350

History

Namhyung Kim a1f3d56761 perf stat: Use cpu-clock event for cpu targets

Currently 'perf stat' always counts task-clock event by default.  But
it's somewhat confusing for system-wide targets (especially with 'sleep
N' as the 'sleep' task just sleeps and doesn't use cputime).  Changing
to cpu-clock event instead for that case makes more sense IMHO.

Before:
  # perf stat -a sleep 0.1

   Performance counter stats for 'system wide':

        403.038603      task-clock (msec)     #    4.001 CPUs utilized
               150      context-switches      #    0.372 K/sec
                 7      cpu-migrations        #    0.017 K/sec
                71      page-faults           #    0.176 K/sec
        23,705,169      cycles                #    0.059 GHz
        15,888,166      instructions          #    0.67  insn per cycle
         3,326,078      branches              #    8.253 M/sec
            87,643      branch-misses         #    2.64% of all branches

       0.100737009 seconds time elapsed

  #

After:

  # perf stat -a sleep 0.1

   Performance counter stats for 'system wide':

        404.271182      cpu-clock (msec)      #    4.000 CPUs utilized
               143      context-switches      #    0.354 K/sec
                13      cpu-migrations        #    0.032 K/sec
                73      page-faults           #    0.181 K/sec
        22,119,220      cycles                #    0.055 GHz
        13,622,065      instructions          #    0.62  insn per cycle
         2,918,769      branches              #    7.220 M/sec
            85,033      branch-misses         #    2.91% of all branches

       0.101073089 seconds time elapsed

  #

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1463119263-5569-3-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

2016-05-16 23:11:47 -03:00

..

perf symbols: Fix kallsyms perf test on ppc64le

2016-05-05 21:04:03 -03:00

perf bench: Remove one more die() call

2016-04-26 13:28:40 -03:00

perf tools: Build syscall table .c header from kernel's syscall_64.tbl

2016-04-08 09:58:14 -03:00

perf record: Disable buildid cache options by default in switch output mode

2016-04-28 09:58:59 -03:00

perf jit: Add support for using TSC as a timestamp

2016-04-01 18:42:55 -03:00

perf python: Support the PERF_RECORD_SWITCH event

2015-10-07 19:41:50 -03:00

perf script: Update export-to-postgresql to support callchain export

2016-05-06 13:00:55 -03:00

perf tests: Add test to check backward ring buffer

2016-05-09 18:11:22 -03:00

perf trace: Move seccomp args beautifiers to tools/perf/trace/beauty/

2016-05-11 13:06:00 -03:00

perf hists: Move sort__has_comm into struct perf_hpp_list

2016-05-05 21:04:02 -03:00

perf stat: Update runtime using cpu-clock event

2016-05-16 23:11:46 -03:00

.gitignore

perf tools: Add Intel PT instruction decoder

2015-08-17 11:11:36 -03:00

Build

perf tools: Set and pass DOCDIR to builtin-report.c

2016-01-12 12:42:07 -03:00

builtin-annotate.c

perf machine: Rename perf_event__preprocess_sample to machine__resolve

2016-03-23 12:03:08 -03:00

builtin-bench.c

perf subcmd: Create subcmd library

2015-12-17 14:27:14 -03:00

builtin-buildid-cache.c

perf tools: Move timestamp creation to util

2016-01-29 17:30:06 -03:00

builtin-buildid-list.c

perf subcmd: Create subcmd library

2015-12-17 14:27:14 -03:00

builtin-config.c

perf config: Make show_config() use perf_config_set

2016-04-14 09:15:47 -03:00

builtin-data.c

perf subcmd: Create subcmd library

2015-12-17 14:27:14 -03:00

builtin-diff.c

perf hists: Move sort__need_collapse into struct perf_hpp_list

2016-05-05 21:03:58 -03:00

builtin-evlist.c

perf evlist: Add --trace-fields option to show trace fields

2016-01-08 14:23:02 -03:00

builtin-help.c

perf help: Make check_emacsclient_version to check strbuf APIs

2016-05-10 11:56:14 -03:00

builtin-inject.c

perf tools: Add time conversion event

2016-03-31 10:52:24 -03:00

builtin-kmem.c

perf callchain: Start moving away from global per thread cursors

2016-04-14 14:48:07 -03:00

builtin-kvm.c

perf evsel: Do not use globals in config()

2016-04-11 22:18:20 -03:00

builtin-list.c

perf subcmd: Create subcmd library

2015-12-17 14:27:14 -03:00

builtin-lock.c

perf subcmd: Create subcmd library

2015-12-17 14:27:14 -03:00

builtin-mem.c

perf mem: Add -U/-K (--all-user/--all-kernel) options

2016-03-30 11:14:07 -03:00

builtin-probe.c

perf subcmd: Create subcmd library

2015-12-17 14:27:14 -03:00

builtin-record.c

perf record: Generate tracking events for process forked by perf

2016-04-28 09:58:59 -03:00

builtin-report.c

perf hists: Move sort__has_parent into struct perf_hpp_list

2016-05-05 21:03:59 -03:00

builtin-sched.c

perf sched map: Display only given cpus

2016-04-13 10:11:52 -03:00

builtin-script.c

perf tools: Set the maximum allowed stack from /proc/sys/kernel/perf_event_max_stack

2016-04-27 10:29:07 -03:00

builtin-stat.c

perf stat: Use cpu-clock event for cpu targets

2016-05-16 23:11:47 -03:00

builtin-timechart.c

perf machine: Rename perf_event__preprocess_sample to machine__resolve

2016-03-23 12:03:08 -03:00

builtin-top.c

perf hists: Move sort__has_socket into struct perf_hpp_list

2016-05-05 21:04:01 -03:00

builtin-trace.c

perf trace: Move seccomp args beautifiers to tools/perf/trace/beauty/

2016-05-11 13:06:00 -03:00

builtin-version.c

perf tools: Move cmd_version() to builtin-version.c

2015-12-09 13:42:03 -03:00

builtin.h

perf tools: Remove needless 'extern' from function prototypes

2016-03-23 15:06:35 -03:00

command-list.txt

perf tools: Do not show trace command if it's not compiled in

2016-01-08 12:46:17 -03:00

CREDITS

…

design.txt

perf tools: Update some code references in design.txt

2014-03-18 18:17:06 -03:00

Makefile

perf build tests: Do parallell builds with 'build-test'

2016-02-04 15:57:00 -03:00

Makefile.perf

perf tools: Build syscall table .c header from kernel's syscall_64.tbl

2016-04-08 09:58:14 -03:00

MANIFEST

perf bench: Fix detached tarball building due to missing 'perf bench memcpy' headers

2016-03-24 12:28:57 -03:00

perf-archive.sh

perf archive: Make 'f' the last parameter for tar

2012-09-17 13:10:42 -03:00

perf-completion.sh

perf tools: Avoid confusion with preloaded bash function for perf bash completion

2015-03-19 13:53:27 -03:00

perf-read-vdso.c

perf tools: Build programs to copy 32-bit compatibility

2014-10-29 10:32:48 -02:00

perf-sys.h

perf tools: Move generic barriers out of perf-sys.h

2015-05-08 16:05:08 -03:00

perf-with-kcore.sh

perf tools: Fix perf-with-kcore handling of arguments containing spaces

2015-08-06 16:48:27 -03:00

perf.c

perf tools: Make alias handler to check return value of strbuf

2016-05-10 11:56:52 -03:00

perf.h

perf tools: Ditch record_opts.callgraph_set

2016-04-18 12:26:27 -03:00