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    Subject[PATCH 09/45] perf tools: Add stat config event read function
    Date
    Introducing perf_event__read_stat_config function to read
    struct perf_stat_config object data from stat config event.

    Link: http://lkml.kernel.org/n/tip-62ae08zz97jp2qkhygp8uet5@git.kernel.org
    Signed-off-by: Jiri Olsa <jolsa@kernel.org>
    ---
    tools/perf/tests/stat.c | 6 ++++++
    tools/perf/util/event.c | 24 ++++++++++++++++++++++++
    tools/perf/util/event.h | 2 ++
    3 files changed, 32 insertions(+)

    diff --git a/tools/perf/tests/stat.c b/tools/perf/tests/stat.c
    index 5e6a2441998c..2049c5a3e4a2 100644
    --- a/tools/perf/tests/stat.c
    +++ b/tools/perf/tests/stat.c
    @@ -24,6 +24,7 @@ static int process_event(struct perf_tool *tool __maybe_unused,
    struct machine *machine __maybe_unused)
    {
    struct stat_config_event *config = &event->stat_config;
    + struct perf_stat_config stat_config;

    #define HAS(term, val) \
    has_term(config, PERF_STAT_CONFIG_TERM__##term, val)
    @@ -35,6 +36,11 @@ static int process_event(struct perf_tool *tool __maybe_unused,

    #undef HAS

    + perf_event__read_stat_config(&stat_config, config);
    +
    + TEST_ASSERT_VAL("wrong aggr_mode", stat_config.aggr_mode == AGGR_CORE);
    + TEST_ASSERT_VAL("wrong scale", stat_config.scale == 1);
    + TEST_ASSERT_VAL("wrong interval", stat_config.interval == 1);
    return 0;
    }

    diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c
    index 6708cc207c38..bd58b87d8be9 100644
    --- a/tools/perf/util/event.c
    +++ b/tools/perf/util/event.c
    @@ -806,6 +806,30 @@ int perf_event__synthesize_stat_config(struct perf_tool *tool,
    return err;
    }

    +void perf_event__read_stat_config(struct perf_stat_config *config,
    + struct stat_config_event *event)
    +{
    + unsigned i;
    +
    + for (i = 0; i < event->nr; i++) {
    +
    + switch (event->data[i].tag) {
    +#define CASE(__term, __val) \
    + case PERF_STAT_CONFIG_TERM__##__term: \
    + config->__val = event->data[i].val; \
    + break;
    +
    + CASE(AGGR_MODE, aggr_mode)
    + CASE(SCALE, scale)
    + CASE(INTERVAL, interval)
    +#undef CASE
    + default:
    + pr_warning("unknown stat config term %" PRIu64 "\n",
    + event->data[i].tag);
    + }
    + }
    +}
    +
    size_t perf_event__fprintf_comm(union perf_event *event, FILE *fp)
    {
    const char *s;
    diff --git a/tools/perf/util/event.h b/tools/perf/util/event.h
    index da6155dac7d1..c0e7a8035b21 100644
    --- a/tools/perf/util/event.h
    +++ b/tools/perf/util/event.h
    @@ -457,6 +457,8 @@ int perf_event__synthesize_stat_config(struct perf_tool *tool,
    struct perf_stat_config *config,
    perf_event__handler_t process,
    struct machine *machine);
    +void perf_event__read_stat_config(struct perf_stat_config *config,
    + struct stat_config_event *event);

    int perf_event__synthesize_modules(struct perf_tool *tool,
    perf_event__handler_t process,
    --
    2.4.3


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