From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751309Ab3LPFZc (ORCPT ); Mon, 16 Dec 2013 00:25:32 -0500 Received: from lgeamrelo01.lge.com ([156.147.1.125]:62888 "EHLO LGEAMRELO01.lge.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750813Ab3LPFZb (ORCPT ); Mon, 16 Dec 2013 00:25:31 -0500 X-AuditID: 9c93017d-b7c5eae000004296-6e-52ae8eca411c From: Namhyung Kim To: Davidlohr Bueso Cc: linux-kernel@vger.kernel.org, acme@ghostprotocols.net, mingo@redhat.com, dvhart@linux.intel.com, peterz@infradead.org, tglx@linutronix.de, jason.low2@hp.com, Waiman.Long@hp.com, scott.norton@hp.com, aswin@hp.com Subject: Re: [PATCH 2/3] perf-bench: add futex-wake microbenchmark References: <1387081917-9102-1-git-send-email-davidlohr@hp.com> <1387081917-9102-3-git-send-email-davidlohr@hp.com> Date: Mon, 16 Dec 2013 14:25:30 +0900 In-Reply-To: <1387081917-9102-3-git-send-email-davidlohr@hp.com> (Davidlohr Bueso's message of "Sat, 14 Dec 2013 20:31:56 -0800") Message-ID: <87k3f5gyet.fsf@sejong.aot.lge.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.1 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain X-Brightmail-Tracker: AAAAAA== Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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