From: Arnaldo Carvalho de Melo <acme@kernel.org>
To: Davidlohr Bueso <dave@stgolabs.net>
Cc: mingo@redhat.com, peterz@infradead.org, tglx@linutronix.de,
linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org,
Davidlohr Bueso <dbueso@suse.de>
Subject: Re: [PATCH 6/7] perf/bench-futex, requeue: Robustify futex_wait() handling
Date: Mon, 9 Aug 2021 11:58:00 -0300 [thread overview]
Message-ID: <YRFCeLsjuIP321EZ@kernel.org> (raw)
In-Reply-To: <20210809043301.66002-7-dave@stgolabs.net>
Em Sun, Aug 08, 2021 at 09:33:00PM -0700, Davidlohr Bueso escreveu:
> Do not assume success and account for EAGAIN or any other return value,
> however unlikely.
Thanks, applied.
- Arnaldo
> Signed-off-by: Davidlohr Bueso <dbueso@suse.de>
> ---
> tools/perf/bench/futex-requeue.c | 15 ++++++++++++++-
> 1 file changed, 14 insertions(+), 1 deletion(-)
>
> diff --git a/tools/perf/bench/futex-requeue.c b/tools/perf/bench/futex-requeue.c
> index 80f40ee92b53..e4892ba6864f 100644
> --- a/tools/perf/bench/futex-requeue.c
> +++ b/tools/perf/bench/futex-requeue.c
> @@ -76,6 +76,8 @@ static void print_summary(void)
>
> static void *workerfn(void *arg __maybe_unused)
> {
> + int ret;
> +
> pthread_mutex_lock(&thread_lock);
> threads_starting--;
> if (!threads_starting)
> @@ -83,7 +85,18 @@ static void *workerfn(void *arg __maybe_unused)
> pthread_cond_wait(&thread_worker, &thread_lock);
> pthread_mutex_unlock(&thread_lock);
>
> - futex_wait(&futex1, 0, NULL, futex_flag);
> + while (1) {
> + ret = futex_wait(&futex1, 0, NULL, futex_flag);
> + if (!ret)
> + break;
> +
> + if (ret && errno != EAGAIN) {
> + if (!params.silent)
> + warn("futex_wait");
> + break;
> + }
> + }
> +
> return NULL;
> }
>
> --
> 2.26.2
>
--
- Arnaldo
next prev parent reply other threads:[~2021-08-09 14:58 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-09 4:32 [PATCH -tip v2 0/7] perf/bench-futex: Misc updates Davidlohr Bueso
2021-08-09 4:32 ` [PATCH 1/7] perf/bench-futex: Group test parameters cleanup Davidlohr Bueso
2021-08-09 4:32 ` [PATCH 2/7] perf/bench-futex: Remove bogus backslash from comment Davidlohr Bueso
2021-08-09 4:32 ` [PATCH 3/7] perf/bench-futex: Factor out futex_flag Davidlohr Bueso
2021-08-09 14:54 ` Arnaldo Carvalho de Melo
2021-08-09 16:30 ` Davidlohr Bueso
2021-08-09 4:32 ` [PATCH 4/7] perf/bench-futex: Add --mlockall parameter Davidlohr Bueso
2021-08-09 14:56 ` Arnaldo Carvalho de Melo
2021-08-09 16:11 ` Davidlohr Bueso
2021-08-09 4:32 ` [PATCH 5/7] perf/bench-futex, requeue: Add --broadcast option Davidlohr Bueso
2021-08-09 14:57 ` Arnaldo Carvalho de Melo
2021-08-09 4:33 ` [PATCH 6/7] perf/bench-futex, requeue: Robustify futex_wait() handling Davidlohr Bueso
2021-08-09 14:58 ` Arnaldo Carvalho de Melo [this message]
2021-08-09 4:33 ` [PATCH 7/7] perf/bench-futex, requeue: Add --pi parameter Davidlohr Bueso
2021-08-09 15:01 ` Arnaldo Carvalho de Melo
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