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    Subject[PATCH 35/57] perf stat record: Write stat events on record
    Date
    Writing stat events on 'perf stat record' at the time
    we read counter values from kernel.

    Link: http://lkml.kernel.org/n/tip-ojc826gy0x9jj74elbjfccej@git.kernel.org
    Signed-off-by: Jiri Olsa <jolsa@kernel.org>
    ---
    tools/perf/builtin-stat.c | 19 +++++++++++++++++++
    1 file changed, 19 insertions(+)

    diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
    index 539566eeea97..81ba5955b1da 100644
    --- a/tools/perf/builtin-stat.c
    +++ b/tools/perf/builtin-stat.c
    @@ -205,6 +205,18 @@ static int process_synthesized_event(struct perf_tool *tool __maybe_unused,
    return 0;
    }

    +#define SID(e, x, y) xyarray__entry(e->sample_id, x, y)
    +
    +static int
    +perf_evsel__write_stat_event(struct perf_evsel *counter, u32 cpu, u32 thread,
    + struct perf_counts_values *count)
    +{
    + struct perf_sample_id *sid = SID(counter, cpu, thread);
    +
    + return perf_event__synthesize_stat(NULL, cpu, thread, sid->id, count,
    + process_synthesized_event, NULL);
    +}
    +
    /*
    * Read out the results of a single counter:
    * do not aggregate counts across CPUs in system-wide mode
    @@ -228,6 +240,13 @@ static int read_counter(struct perf_evsel *counter)
    count = perf_counts(counter->counts, cpu, thread);
    if (perf_evsel__read(counter, cpu, thread, count))
    return -1;
    +
    + if (STAT_RECORD) {
    + if (perf_evsel__write_stat_event(counter, cpu, thread, count)) {
    + pr_err("failed to write stat event\n");
    + return -1;
    + }
    + }
    }
    }

    --
    2.4.3


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