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    Subject[PATCH v2 0/2] perf stat: Add interval-count and time support
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    From: yuzhoujian <yuzhoujian@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

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