Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755858Ab0A2OeI (ORCPT ); Fri, 29 Jan 2010 09:34:08 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755814Ab0A2OeH (ORCPT ); Fri, 29 Jan 2010 09:34:07 -0500 Received: from 0122700014.0.fullrate.dk ([95.166.99.235]:51125 "EHLO kernel.dk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755686Ab0A2OeG (ORCPT ); Fri, 29 Jan 2010 09:34:06 -0500 Date: Fri, 29 Jan 2010 15:34:03 +0100 From: Jens Axboe To: Hitoshi Mitake Cc: Ingo Molnar , linux-kernel@vger.kernel.org, Peter Zijlstra , Paul Mackerras , Tom Zanussi , Steven Rostedt , Thomas Gleixner , Greg Kroah-Hartman Subject: Re: [PATCH 00/12] perf lock: New subcommand "perf lock", for analyzing lock statistics Message-ID: <20100129143403.GJ13771@kernel.dk> References: <1264167553-6510-1-git-send-email-mitake@dcl.info.waseda.ac.jp> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1264167553-6510-1-git-send-email-mitake@dcl.info.waseda.ac.jp> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 774 Lines: 23 On Fri, Jan 22 2010, Hitoshi Mitake wrote: > Adding new subcommand "perf lock" to perf. > > I made this patch series on > latest perf/core of tip (ef12a141306c90336a3a10d40213ecd98624d274), > so please apply this series to perf/core. [snip] I wanted to give this a go today, since I think it's pretty nifty and a lot better than using /proc/lock_stat. But it basically spirals the system into death [1]. How big a system did you test this on? [1] Got this: [ 117.097918] hrtimer: interrupt took 35093901 ns -- Jens Axboe -- 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/