Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759437AbXEKM4R (ORCPT ); Fri, 11 May 2007 08:56:17 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756799AbXEKM4K (ORCPT ); Fri, 11 May 2007 08:56:10 -0400 Received: from rtsoft3.corbina.net ([85.21.88.6]:2210 "EHLO buildserver.ru.mvista.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1755384AbXEKM4J (ORCPT ); Fri, 11 May 2007 08:56:09 -0400 Message-ID: <4644A01F.4080501@ru.mvista.com> Date: Fri, 11 May 2007 16:55:59 +0000 From: Maxim Uvarov User-Agent: Debian Thunderbird 1.0.7 (X11/20051017) X-Accept-Language: en-us, en MIME-Version: 1.0 To: Andi Kleen Cc: LKML Subject: Re: [PATCH] Performance Stats: Kernel patch References: <20070510171947.19532.70784.stgit@localhost.localdomain> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 917 Lines: 29 Andi Kleen wrote: >Maxim Uvarov writes: > > >>This data is useful for detecting hyperactivity >>patterns between processes. >> >> > >You need a lot better rationale to slow down these important >fast paths. Particularly the syscall path is very hot. > >Is this something that is really generally useful? The context >switch counters might be occasionally useful, but strace can >you just give the syscall count anyways. Still not sure >it really should go into the standard kernel. Perhaps just keep it >as a systemtap script? > >-Andi > > It is difficult to use strace for multi thread applications to verify which thread is doing what. - 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/