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authorDavidlohr Bueso <dave@stgolabs.net>2021-08-09 07:32:59 +0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2021-08-09 18:00:10 +0300
commitd262e6a93b3ceb3db7e6388d89352801f02c3260 (patch)
tree24d268c1c396b0637d1606b23eb254a2bbab36ef /tools/perf/bench
parent9f9a3ffe94f263388b99cb75e4ec374e31aaeb0f (diff)
downloadlinux-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/perf/bench')
-rw-r--r--tools/perf/bench/futex-requeue.c4
-rw-r--r--tools/perf/bench/futex.h1
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", &params.silent, "Silent mode: do not display data/details"),
OPT_BOOLEAN( 'S', "shared", &params.fshared, "Use shared futexes instead of private ones"),
OPT_BOOLEAN( 'm', "mlockall", &params.mlockall, "Lock all current and future memory"),
+ OPT_BOOLEAN( 'B', "broadcast", &params.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;