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author | Thomas Gleixner <tglx@linutronix.de> | 2015-06-05 22:25:01 +0200 |
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committer | Thomas Gleixner <tglx@linutronix.de> | 2015-06-05 22:25:01 +0200 |
commit | 9f61f62544747db5d5c590bfae9dd19f1337e421 (patch) | |
tree | 74772cccd14e7ab6d01a3452d4030cd7f8e58ccb /tools/perf/bench/futex-requeue.c | |
parent | de8d1810fda5463ee60ba2937ca68e55a52bd9e7 (diff) | |
parent | 086e8ddb567951513a5dace21a09297768aee14f (diff) | |
download | linux-9f61f62544747db5d5c590bfae9dd19f1337e421.tar.bz2 |
Merge branch 'linus' into irq/core
Get the urgent fixes from upstream to avoid conflicts.
Diffstat (limited to 'tools/perf/bench/futex-requeue.c')
-rw-r--r-- | tools/perf/bench/futex-requeue.c | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/tools/perf/bench/futex-requeue.c b/tools/perf/bench/futex-requeue.c index bedff6b5b3cf..ad0d9b5342fb 100644 --- a/tools/perf/bench/futex-requeue.c +++ b/tools/perf/bench/futex-requeue.c @@ -132,6 +132,9 @@ int bench_futex_requeue(int argc, const char **argv, if (!fshared) futex_flag = FUTEX_PRIVATE_FLAG; + if (nrequeue > nthreads) + nrequeue = nthreads; + printf("Run summary [PID %d]: Requeuing %d threads (from [%s] %p to %p), " "%d at a time.\n\n", getpid(), nthreads, fshared ? "shared":"private", &futex1, &futex2, nrequeue); @@ -161,20 +164,18 @@ int bench_futex_requeue(int argc, const char **argv, /* Ok, all threads are patiently blocked, start requeueing */ gettimeofday(&start, NULL); - for (nrequeued = 0; nrequeued < nthreads; nrequeued += nrequeue) { + while (nrequeued < nthreads) { /* * Do not wakeup any tasks blocked on futex1, allowing * us to really measure futex_wait functionality. */ - futex_cmp_requeue(&futex1, 0, &futex2, 0, - nrequeue, futex_flag); + nrequeued += futex_cmp_requeue(&futex1, 0, &futex2, 0, + nrequeue, futex_flag); } + gettimeofday(&end, NULL); timersub(&end, &start, &runtime); - if (nrequeued > nthreads) - nrequeued = nthreads; - update_stats(&requeued_stats, nrequeued); update_stats(&requeuetime_stats, runtime.tv_usec); @@ -184,7 +185,7 @@ int bench_futex_requeue(int argc, const char **argv, } /* everybody should be blocked on futex2, wake'em up */ - nrequeued = futex_wake(&futex2, nthreads, futex_flag); + nrequeued = futex_wake(&futex2, nrequeued, futex_flag); if (nthreads != nrequeued) warnx("couldn't wakeup all tasks (%d/%d)", nrequeued, nthreads); |