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From: Arnaldo Carvalho de Melo <acme@kernel.org>
To: Davidlohr Bueso <dave@stgolabs.net>
Cc: Ingo Molnar <mingo@kernel.org>,
	linux-kernel@vger.kernel.org, Davidlohr Bueso <dbueso@suse.de>
Subject: Re: [PATCH 1/2] perf bench futex: Support parallel waker threads
Date: Fri, 8 May 2015 16:24:29 -0300	[thread overview]
Message-ID: <20150508192429.GP7862@kernel.org> (raw)
In-Reply-To: <1431110280-20231-1-git-send-email-dave@stgolabs.net>

Em Fri, May 08, 2015 at 11:37:59AM -0700, Davidlohr Bueso escreveu:
> The futex-wake benchmark only measures wakeups done within
> a single process. While this has value in its own, it does
> not really generate any hb->lock contention. A new benchmark
> 'wake-parallel' is added, by extending the futex-wake code
> such that we can measure parallel waker threads. The program
> output shows the avg per-thread latency in order to complete
> its share of wakeups:
> 
> Run summary [PID 13474]: blocking on 512 threads (at [private] futex 0xa88668), 8 threads waking up 64 at a time.

Thanks, applied both to perf/core.

- Arnaldo

  parent reply	other threads:[~2015-05-08 19:24 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-05-08 18:37 [PATCH 1/2] perf bench futex: Support parallel waker threads Davidlohr Bueso
2015-05-08 18:38 ` [PATCH 2/2] perf bench futex: Handle spurious wakeups Davidlohr Bueso
2015-05-10  7:11   ` [tip:perf/core] " tip-bot for Davidlohr Bueso
2015-05-08 19:24 ` Arnaldo Carvalho de Melo [this message]
2015-05-10  7:10 ` [tip:perf/core] perf bench futex: Support parallel waker threads tip-bot for Davidlohr Bueso

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