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    Subject[PATCH 21/45] perf stat record: Synthesize stat record data
    Date
    Synthesizing needed stat record data for report/script:
    - cpu/thread maps
    - stat config

    Link: http://lkml.kernel.org/n/tip-wni1s2i2sq17g4vomjyda2yf@git.kernel.org
    Signed-off-by: Jiri Olsa <jolsa@kernel.org>
    ---
    tools/perf/builtin-stat.c | 47 +++++++++++++++++++++++++++++++++++++++++++++++
    1 file changed, 47 insertions(+)

    diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
    index a81896b2307b..fa5299db0d2d 100644
    --- a/tools/perf/builtin-stat.c
    +++ b/tools/perf/builtin-stat.c
    @@ -191,6 +191,20 @@ static inline int nsec_counter(struct perf_evsel *evsel)
    return 0;
    }

    +static int process_synthesized_event(struct perf_tool *tool __maybe_unused,
    + union perf_event *event,
    + struct perf_sample *sample __maybe_unused,
    + struct machine *machine __maybe_unused)
    +{
    + if (perf_data_file__write(&perf_stat.file, event, event->header.size) < 0) {
    + pr_err("failed to write perf data, error: %m\n");
    + return -1;
    + }
    +
    + perf_stat.bytes_written += event->header.size;
    + return 0;
    +}
    +
    /*
    * Read out the results of a single counter:
    * do not aggregate counts across CPUs in system-wide mode
    @@ -277,6 +291,35 @@ static void workload_exec_failed_signal(int signo __maybe_unused, siginfo_t *inf
    workload_exec_errno = info->si_value.sival_int;
    }

    +static int perf_stat_synthesize_config(void)
    +{
    + int err;
    +
    + err = perf_event__synthesize_thread_map2(NULL, evsel_list->threads,
    + process_synthesized_event,
    + NULL);
    + if (err < 0) {
    + pr_err("Couldn't synthesize thread map.\n");
    + return err;
    + }
    +
    + err = perf_event__synthesize_cpu_map(NULL, evsel_list->cpus,
    + process_synthesized_event, NULL);
    + if (err < 0) {
    + pr_err("Couldn't synthesize thread map.\n");
    + return err;
    + }
    +
    + err = perf_event__synthesize_stat_config(NULL, &stat_config,
    + process_synthesized_event, NULL);
    + if (err < 0) {
    + pr_err("Couldn't synthesize config.\n");
    + return err;
    + }
    +
    + return 0;
    +}
    +
    static int __run_perf_stat(int argc, const char **argv)
    {
    int interval = stat_config.interval;
    @@ -357,6 +400,10 @@ static int __run_perf_stat(int argc, const char **argv)
    fd, false);
    if (err < 0)
    return err;
    +
    + err = perf_stat_synthesize_config();
    + if (err < 0)
    + return err;
    }

    /*
    --
    2.4.3


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