Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754227Ab0BAJP4 (ORCPT ); Mon, 1 Feb 2010 04:15:56 -0500 Received: from bombadil.infradead.org ([18.85.46.34]:39126 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752039Ab0BAJPz (ORCPT ); Mon, 1 Feb 2010 04:15:55 -0500 Subject: Re: [PATCH 00/12] perf lock: New subcommand "perf lock", for analyzing lock statistics From: Peter Zijlstra To: Frederic Weisbecker Cc: Jens Axboe , Hitoshi Mitake , Ingo Molnar , linux-kernel@vger.kernel.org, Paul Mackerras , Tom Zanussi , Steven Rostedt , Thomas Gleixner , Greg Kroah-Hartman In-Reply-To: <20100131210707.GF5224@nowhere> References: <1264167553-6510-1-git-send-email-mitake@dcl.info.waseda.ac.jp> <20100129143403.GJ13771@kernel.dk> <4B641F4D.6090704@dcl.info.waseda.ac.jp> <20100131204408.GC13771@kernel.dk> <20100131210707.GF5224@nowhere> Content-Type: text/plain; charset="UTF-8" Date: Mon, 01 Feb 2010 10:15:20 +0100 Message-ID: <1265015720.24455.101.camel@laptop> Mime-Version: 1.0 X-Mailer: Evolution 2.28.1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 612 Lines: 14 On Sun, 2010-01-31 at 22:07 +0100, Frederic Weisbecker wrote: > > - We are using the -M option from perf tools which multiplexes every > event buffers, which means every cpu commit their lock events in > the same buffer. Couple that with the two above reasons, it's supposed > to scale at worst. Why are you doing that? That seems like asking for trouble.. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/