From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261675AbTDHTwn (for ); Tue, 8 Apr 2003 15:52:43 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261692AbTDHTwn (for ); Tue, 8 Apr 2003 15:52:43 -0400 Received: from air-2.osdl.org ([65.172.181.6]:33727 "EHLO mail.osdl.org") by vger.kernel.org with ESMTP id S261675AbTDHTwl (for ); Tue, 8 Apr 2003 15:52:41 -0400 Date: Tue, 8 Apr 2003 13:03:48 -0700 From: "Randy.Dunlap" To: "shesha bhushan" Cc: linux-kernel@vger.kernel.org, kernelnewbies@nl.linux.org Subject: Re: KERNEL PROFILING Message-Id: <20030408130348.11e3946b.rddunlap@osdl.org> In-Reply-To: References: Organization: OSDL X-Mailer: Sylpheed version 0.8.11 (GTK+ 1.2.10; i586-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org I don't know why it's not created. What kernel version is this? Did you build the kernel or is it from someone else who could have modified it? The only failure that I see in profile setup/init is Out of Memory if the profile buffer cannot be allocated. Did you search thru the boot message log for any errors? ~Randy On Tue, 08 Apr 2003 19:42:03 +0000 "shesha bhushan" wrote: | | Hi | If I use the command line option "profile=2" while booting the system, why | /proc/profile file is not created? Should I have to create it manually? | | Thanking You' | Shesha | | | | | | >From: "Randy.Dunlap" | >To: "shesha bhushan" | >CC: linux-kernel@vger.kernel.org, kernelnewbies@nl.linux.org | >Subject: Re: KERNEL PROFILING | >Date: Tue, 8 Apr 2003 08:01:55 -0700 | > | >On Tue, 08 Apr 2003 07:58:54 +0000 "shesha bhushan" | > wrote: | > | >| HI ALL, | >| I am trying to profile the linux kernel. Can any one suggest an easy | >way | >| to do. Like, I wanted to see how much TCP is using CPU, how much of CPU | >is | >| used in memcpy, etc. | >| Can any one please suggest me. | > | >Start with the file linux/Documentation/basic_profiling.txt | >(it's in Linux 2.5.66-or-so or later). | > | >It explains how to use oprofile and readprofile. | > | >You can read about oprofile at http://oprofile.sourceforge.net/ . | > | >You can read about basic in-kernel profiling using /proc/profile | >and readprofile via 'man readprofile'. It's simple to use. | > | >-- | >~Randy