From: yuzhoujian <yuzhouj...@didichuxing.com> 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 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): Patch 1: Add support to print counts for fixed times Patch 2: Add support to print counts after a period of time 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