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| author | Davidlohr Bueso <dave@stgolabs.net> | 2021-08-09 07:32:59 +0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2021-08-09 18:00:10 +0300 |
| commit | d262e6a93b3ceb3db7e6388d89352801f02c3260 (patch) | |
| tree | 24d268c1c396b0637d1606b23eb254a2bbab36ef /tools | |
| parent | 9f9a3ffe94f263388b99cb75e4ec374e31aaeb0f (diff) | |
| download | linux-d262e6a93b3ceb3db7e6388d89352801f02c3260.tar.xz | |
perf bench futex, requeue: Add --broadcast option
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>
Cc: Davidlohr Bueso <dbueso@suse.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lore.kernel.org/lkml/20210809043301.66002-6-dave@stgolabs.net
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/perf/bench/futex-requeue.c | 4 | ||||
| -rw-r--r-- | tools/perf/bench/futex.h | 1 |
2 files changed, 5 insertions, 0 deletions
diff --git a/tools/perf/bench/futex-requeue.c b/tools/perf/bench/futex-requeue.c index 73d4a6c3fe52..6606569e7ccc 100644 --- a/tools/perf/bench/futex-requeue.c +++ b/tools/perf/bench/futex-requeue.c @@ -53,6 +53,7 @@ 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() }; @@ -154,6 +155,9 @@ 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 fca4eee5e040..40a89f192c53 100644 --- a/tools/perf/bench/futex.h +++ b/tools/perf/bench/futex.h @@ -18,6 +18,7 @@ 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; |