From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751463AbWFPPpY (ORCPT ); Fri, 16 Jun 2006 11:45:24 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751466AbWFPPpX (ORCPT ); Fri, 16 Jun 2006 11:45:23 -0400 Received: from pentafluge.infradead.org ([213.146.154.40]:30176 "EHLO pentafluge.infradead.org") by vger.kernel.org with ESMTP id S1751463AbWFPPpW (ORCPT ); Fri, 16 Jun 2006 11:45:22 -0400 Date: Fri, 16 Jun 2006 16:45:19 +0100 From: Christoph Hellwig To: "Frank Ch. Eigler" Cc: eranian@hpl.hp.com, Christoph Hellwig , linux-kernel@vger.kernel.org, systemtap@sources.redhat.com, wcohen@redhat.com, perfmon@napali.hpl.hp.com Subject: Re: [PATCH 9/16] 2.6.17-rc6 perfmon2 patch for review: kernel-level API support (kapi) Message-ID: <20060616154519.GA28931@infradead.org> Mail-Followup-To: Christoph Hellwig , "Frank Ch. Eigler" , eranian@hpl.hp.com, linux-kernel@vger.kernel.org, systemtap@sources.redhat.com, wcohen@redhat.com, perfmon@napali.hpl.hp.com References: <200606150907.k5F97coF008178@frankl.hpl.hp.com> <20060616135014.GB12657@infradead.org> <20060616140234.GI10034@frankl.hpl.hp.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.4.2.1i X-SRS-Rewrite: SMTP reverse-path rewritten from by pentafluge.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Jun 16, 2006 at 11:41:32AM -0400, Frank Ch. Eigler wrote: > Whether one uses systemtap, raw kprobes, or some specialized > tracing/stats-collecting patch surely forthcoming, kernel-level APIs > would be needed to perform fine-grained kernel-scope measurements > using these counters. No, there's not need to add kernel bloat for performance monitoring. This kind of stuff shoul dabsolutely be done from userspace.