linux-kernel - Re: [PATCH 2/3] perf-bench: add futex-wake microbenchmark

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Message-ID: <87k3f5gyet.fsf@sejong.aot.lge.com>
Date:	Mon, 16 Dec 2013 14:25:30 +0900
From:	Namhyung Kim <namhyung@...nel.org>
To:	Davidlohr Bueso <davidlohr@...com>
Cc:	linux-kernel@...r.kernel.org, acme@...stprotocols.net,
	mingo@...hat.com, dvhart@...ux.intel.com, peterz@...radead.org,
	tglx@...utronix.de, jason.low2@...com, Waiman.Long@...com,
	scott.norton@...com, aswin@...com
Subject: Re: [PATCH 2/3] perf-bench: add futex-wake microbenchmark

Hi Davidlohr,

On Sat, 14 Dec 2013 20:31:56 -0800, Davidlohr Bueso wrote:
> Block a bunch of threads on a futex and wake them up, N at a time.
>
> This program is particularly useful to measure the latency of nthread wakeups
> in non-error situations:  all waiters are queued and all wake calls wakeup
> one or more tasks. An example run:
>
> $ perf bench futex -t 512 -r 100

Did you mean 'perf bench futex wake'?

Thanks,
Namhyung
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