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| author |  Namhyung Kim <namhyung@kernel.org>
| 2022-08-18 17:36:42 -0700 |
|---|---|---|
| committer |  Arnaldo Carvalho de Melo <acme@redhat.com>
| 2022-08-19 15:56:27 -0300 |
| commit | 89e3106fa25fb1b626a7123dba870159d453e785 (patch) | |
| tree | 479a3e263e2c45941b75278480fa07d0c51e2938 /tools/lib/perf/include | |
| parent | tools headers UAPI: Sync linux/perf_event.h with the kernel sources (diff) | |
| download | linux-89e3106fa25fb1b626a7123dba870159d453e785.tar.gz linux-89e3106fa25fb1b626a7123dba870159d453e785.tar.bz2 linux-89e3106fa25fb1b626a7123dba870159d453e785.zip | |
libperf: Handle read format in perf_evsel__read()
The perf_counts_values should be increased to read the new lost data.
Also adjust values after read according the read format.
This supports PERF_FORMAT_GROUP which has a different data format but
it's only available for leader events. Currently it doesn't have an API
to read sibling (member) events in the group. But users may read the
sibling event directly.
Also reading from mmap would be disabled when the read format has ID or
LOST bit as it's not exposed via mmap.
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20220819003644.508916-3-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/lib/perf/include')
| -rw-r--r-- | tools/lib/perf/include/perf/event.h | 3 | ||||
| -rw-r--r-- | tools/lib/perf/include/perf/evsel.h | 4 |
2 files changed, 5 insertions, 2 deletions
diff --git a/tools/lib/perf/include/perf/event.h b/tools/lib/perf/include/perf/event.h index 57f54781f5ed..93bf93a59c99 100644 --- a/tools/lib/perf/include/perf/event.h +++ b/tools/lib/perf/include/perf/event.h @@ -77,7 +77,7 @@ struct perf_record_lost_samples { }; /* - * PERF_FORMAT_ENABLED | PERF_FORMAT_RUNNING | PERF_FORMAT_ID + * PERF_FORMAT_ENABLED | PERF_FORMAT_RUNNING | PERF_FORMAT_ID | PERF_FORMAT_LOST */ struct perf_record_read { struct perf_event_header header; @@ -86,6 +86,7 @@ struct perf_record_read { __u64 time_enabled; __u64 time_running; __u64 id; + __u64 lost; }; struct perf_record_throttle { diff --git a/tools/lib/perf/include/perf/evsel.h b/tools/lib/perf/include/perf/evsel.h index 699c0ed97d34..6f92204075c2 100644 --- a/tools/lib/perf/include/perf/evsel.h +++ b/tools/lib/perf/include/perf/evsel.h @@ -18,8 +18,10 @@ struct perf_counts_values { uint64_t val; uint64_t ena; uint64_t run; + uint64_t id; + uint64_t lost; }; - uint64_t values[3]; + uint64_t values[5]; }; }; |