On Mon, Jan 29, 2018 at 10:25:21AM +0100, ufo19890607 wrote: > From: yuzhoujian <[email protected]> > > Introduce two new options for perf stat and update perf-stat documentation > accordingly. > > The interval-count option can be used to print counts for fixed number of > times, and it should be used specifically with "-I" option. > > Show below is the output of the interval-count option for perf stat. > > $ perf stat -I 1000 --interval-count 2 -e cycles -a > # time counts unit events > 1.002827089 93,884,870 cycles > 2.004231506 56,573,446 cycles > > The time option can be used to print counts after a period of time, and it > should not be used with "-I" option. > > Show below is the output of the time option for perf stat. > > $ perf stat --time 2000 -e cycles -a > Performance counter stats for 'system wide': > > 157,260,423 cycles > > 2.003060766 seconds time elapsed > > yuzhoujian (2): > perf stat: Add support to print counts for fixed times > perf stat: Add support to print counts after a period of time > > Changes since v3: > - merge interval_count check and times check to one line. > - fix the wrong indent in stat.h > - use stat_config.times instead of 'times' in cmd_stat function.
Acked-by: Jiri Olsa <[email protected]> thanks, jirka > > Changes since v2: > - modify the time check in __run_perf_stat func to keep some consistency > with the workload case. > - add the warning when the time is set between 10ms to 100ms. > - add the pr_err when the time is set below 10ms. > > Changes since v1: > - change the name of the new option "times-print" to "interval-count". > - keep the interval-count option interval specifically. > > > tools/perf/Documentation/perf-stat.txt | 10 +++++++ > tools/perf/builtin-stat.c | 53 > ++++++++++++++++++++++++++++++++-- > tools/perf/util/stat.h | 2 ++ > 3 files changed, 62 insertions(+), 3 deletions(-) > > -- > 2.14.1 >
