Messages in this thread Patch in this message | | | From | Davidlohr Bueso <> | Subject | [PATCH 5/7] perf/bench-futex, requeue: Add --broadcast option | Date | Sun, 8 Aug 2021 21:32:59 -0700 |
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Such that all threads are requeued to uaddr2 in a single futex_cmp_requeue(), unlike the default, which is 1.
Signed-off-by: Davidlohr Bueso <dbueso@suse.de> --- tools/perf/bench/futex-requeue.c | 4 ++++ tools/perf/bench/futex.h | 1 + 2 files changed, 5 insertions(+)
diff --git a/tools/perf/bench/futex-requeue.c b/tools/perf/bench/futex-requeue.c index 88cb7e2a6729..80f40ee92b53 100644 --- a/tools/perf/bench/futex-requeue.c +++ b/tools/perf/bench/futex-requeue.c @@ -52,6 +52,7 @@ static const struct option options[] = { OPT_BOOLEAN( 's', "silent", ¶ms.silent, "Silent mode: do not display data/details"), OPT_BOOLEAN( 'S', "shared", ¶ms.fshared, "Use shared futexes instead of private ones"), OPT_BOOLEAN( 'm', "mlockall", ¶ms.mlockall, "Lock all current and future memory"), + OPT_BOOLEAN( 'B', "broadcast", ¶ms.broadcast, "Requeue all threads at once"), OPT_END() }; @@ -153,6 +154,9 @@ int bench_futex_requeue(int argc, const char **argv) if (params.nrequeue > params.nthreads) params.nrequeue = params.nthreads; + if (params.broadcast) + params.nrequeue = params.nthreads; + printf("Run summary [PID %d]: Requeuing %d threads (from [%s] %p to %p), " "%d at a time.\n\n", getpid(), params.nthreads, params.fshared ? "shared":"private", &futex1, &futex2, params.nrequeue); diff --git a/tools/perf/bench/futex.h b/tools/perf/bench/futex.h index 1c8fa469993f..36f158650edf 100644 --- a/tools/perf/bench/futex.h +++ b/tools/perf/bench/futex.h @@ -21,6 +21,7 @@ struct bench_futex_parameters { bool fshared; bool mlockall; bool multi; /* lock-pi */ + bool broadcast; /* requeue */ unsigned int runtime; /* seconds*/ unsigned int nthreads; unsigned int nfutexes; -- 2.26.2
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