Re: [PATCH 0/2] perf stat: Support overall statistics for interval mode

Jiri Olsa
2020-05-01T11:37:03Z

On Thu, Apr 30, 2020 at 11:07:38AM +0800, Jin Yao wrote:
> Currently perf-stat supports to print counts at regular interval (-I),
> but it's not very easy for user to get the overall statistics.
>
> With this patchset, it supports to report the summary at the end of
> interval output.
>
> For example,
>
> root@kbl-ppc:~# perf stat -e cycles -I1000 --interval-count 2
> # time counts unit events
> 1.000412064 2,281,114 cycles
> 2.001383658 2,547,880 cycles
>
> Performance counter stats for 'system wide':
>
> 4,828,994 cycles
>
> 2.002860349 seconds time elapsed
>
> root@kbl-ppc:~# perf stat -e cycles,instructions -I1000 --interval-count 2
> # time counts unit events
> 1.000389902 1,536,093 cycles
> 1.000389902 420,226 instructions # 0.27 insn per cycle
> 2.001433453 2,213,952 cycles
> 2.001433453 735,465 instructions # 0.33 insn per cycle
>
> Performance counter stats for 'system wide':
>
> 3,750,045 cycles
> 1,155,691 instructions # 0.31 insn per cycle
>
> 2.003023361 seconds time elapsed
>
> root@kbl-ppc:~# perf stat -M CPI,IPC -I1000 --interval-count 2
> # time counts unit events
> 1.000435121 905,303 inst_retired.any # 2.9 CPI
> 1.000435121 2,663,333 cycles
> 1.000435121 914,702 inst_retired.any # 0.3 IPC
> 1.000435121 2,676,559 cpu_clk_unhalted.thread
> 2.001615941 1,951,092 inst_retired.any # 1.8 CPI
> 2.001615941 3,551,357 cycles
> 2.001615941 1,950,837 inst_retired.any # 0.5 IPC
> 2.001615941 3,551,044 cpu_clk_unhalted.thread
>
> Performance counter stats for 'system wide':
>
> 2,856,395 inst_retired.any # 2.2 CPI
> 6,214,690 cycles
> 2,865,539 inst_retired.any # 0.5 IPC
> 6,227,603 cpu_clk_unhalted.thread
>
> 2.003403078 seconds time elapsed
>
> Jin Yao (2):
> perf evsel: Create counts for collecting summary data
> perf stat: Report summary for interval mode

good idea, but I can't apply this on latest Arnaldo's perf/core,
could you please rebase?

thanks,
jirka

>
> tools/perf/builtin-stat.c | 14 ++++++-
> tools/perf/util/evsel.c | 10 ++++-
> tools/perf/util/evsel.h | 1 +
> tools/perf/util/stat.c | 77 +++++++++++++++++++++++++++++++++++++++
> tools/perf/util/stat.h | 5 +++
> 5 files changed, 103 insertions(+), 4 deletions(-)
>
> --
> 2.17.1
>