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| author | Namhyung Kim <namhyung@kernel.org> | 2024-08-29 23:51:49 -0700 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2024-08-30 09:57:47 -0300 |
| commit | 05a5dd1dfd8fdeee6498875c2d78d4385d627bd6 (patch) | |
| tree | 17b8cff0110711636b4f320ec731f6b1878c36a0 /tools/perf/util/llvm-c-helpers.cpp | |
| parent | 10d6c57c824e21b4cf8eda9491caea06edac9fd7 (diff) | |
perf lock contention: Simplify spinlock check
The LCB_F_SPIN bit is used for spinlock, rwlock and optimistic spinning
in mutex. In get_tstamp_elem() it needs to check spinlock and rwlock
only. As mutex sets the LCB_F_MUTEX, it can check those two bits and
reduce the number of operations.
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Song Liu <song@kernel.org>
Cc: bpf@vger.kernel.org
Link: https://lore.kernel.org/r/20240830065150.1758962-2-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/llvm-c-helpers.cpp')
0 files changed, 0 insertions, 0 deletions