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| author | Namhyung Kim <[email protected]> | 2022-08-19 00:36:44 +0000 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <[email protected]> | 2022-08-19 18:56:56 +0000 |
| commit | f52679b78877f17e95a317e18a4c9c46cc3d845a (patch) | |
| tree | 7cc9aee80b0470248775ae6f08f18e92a4c44099 /drivers/gpu/drm/amd/amdgpu/amdgpu_object.c | |
| parent | libperf: Add a test case for read formats (diff) | |
| download | kernel-f52679b78877f17e95a317e18a4c9c46cc3d845a.tar.gz kernel-f52679b78877f17e95a317e18a4c9c46cc3d845a.zip | |
perf tools: Support reading PERF_FORMAT_LOST
The recent kernel added lost count can be read from either read(2) or
ring buffer data with PERF_SAMPLE_READ. As it's a variable length data
we need to access it according to the format info.
But for perf tools use cases, PERF_FORMAT_ID is always set. So we can
only check PERF_FORMAT_LOST bit to determine the data format.
Add sample_read_value_size() and next_sample_read_value() helpers to
make it a bit easier to access. Use them in all places where it reads
the struct sample_read_value.
Signed-off-by: Namhyung Kim <[email protected]>
Acked-by: Jiri Olsa <[email protected]>
Cc: Ian Rogers <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_object.c')
0 files changed, 0 insertions, 0 deletions