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| author | Namhyung Kim <namhyung@kernel.org> | 2022-10-20 10:26:39 -0700 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2022-10-27 16:37:26 -0300 |
| commit | 6b7e02ab1262141cfebd05b68410fa297f557961 (patch) | |
| tree | 0b7996c3d629689f626b162e3f7d3f89cbf54229 /tools/perf/util/trace-event-scripting.c | |
| parent | perf test: Use a test program in 'perf record' tests (diff) | |
| download | linux-6b7e02ab1262141cfebd05b68410fa297f557961.tar.gz linux-6b7e02ab1262141cfebd05b68410fa297f557961.zip | |
perf test: Wait for a new thread when testing --per-thread record
Just running the target program is not enough to test multi-thread
target because it'd be racy perf vs target startup. I used the
initial delay but it cannot guarantee for perf to see the thread.
Instead, use wait_for_threads helper from shell/lib/waiting.sh to make
sure it starts the sibling thread first. Then perf record can use -p
option to profile the target process.
Reviewed-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20221020172643.3458767-5-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/trace-event-scripting.c')
0 files changed, 0 insertions, 0 deletions