Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753839AbZCDDYS (ORCPT ); Tue, 3 Mar 2009 22:24:18 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751305AbZCDDYC (ORCPT ); Tue, 3 Mar 2009 22:24:02 -0500 Received: from hrndva-omtalb.mail.rr.com ([71.74.56.124]:55748 "EHLO hrndva-omtalb.mail.rr.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750774AbZCDDYA (ORCPT ); Tue, 3 Mar 2009 22:24:00 -0500 Date: Tue, 3 Mar 2009 22:23:57 -0500 (EST) From: Steven Rostedt X-X-Sender: rostedt@gandalf.stny.rr.com To: linux-kernel@vger.kernel.org cc: Ingo Molnar , Andrew Morton , Peter Zijlstra , Frederic Weisbecker , Theodore Tso , Arjan van de Ven , Pekka Paalanen , Arnaldo Carvalho de Melo , "H. Peter Anvin" , Mathieu Desnoyers , Martin Bligh , "Frank Ch. Eigler" , Tom Zanussi , Masami Hiramatsu , KOSAKI Motohiro , Jason Baron , Christoph Hellwig , Jiaying Zhang , Eduard - Gabriel Munteanu , mrubin@google.com, md@google.com Subject: Re: [PATCH 0/5] [RFC] binary reading of ftrace ring buffers In-Reply-To: Message-ID: References: <20090304024921.153061228@goodmis.org> User-Agent: Alpine 2.00 (DEB 1167 2008-08-23) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1895 Lines: 46 On Tue, 3 Mar 2009, Steven Rostedt wrote: > > On Tue, 3 Mar 2009, Steven Rostedt wrote: > > > Yes you can run multiple instances of this on different buffers. > > > > # ./rb-read.pl /tmp/buf-0 > > > > produces: > > > > 0 [000] 7071.936459: (irq_handler_entry) irq 48 > > 0 [000] 7071.936462: (irq_handler_exit) irq 48 ret 1 > > 0 [000] 7071.988801: (sched_signal_send) sig: 14 task 0 > > 0 [000] 7071.988813: (sched_wakeup) task 0 success=1 > > 0 [000] 7071.988823: (sched_switch) prev 0:140 ==> next ntpd:6582272:0 > > 3303 [000] 7071.988916: (sched_switch) prev 0:120 ==> next swap:7497072:0 > > 0 [000] 7072.020370: (sched_wakeup) task 0 success=1 > > 0 [000] 7072.020407: (sched_switch) prev 0:140 ==> next even:808416116:0 > > My perl script is still a bit buggy, but you get the idea ;-) Uploaded a fix: 0 [000] 7071.936459: (irq_handler_entry) irq 48 0 [000] 7071.936462: (irq_handler_exit) irq 48 ret 1 0 [000] 7071.988801: (sched_signal_send) sig: 14 task 3303 0 [000] 7071.988813: (sched_wakeup) task 3303 success=1 0 [000] 7071.988823: (sched_switch) prev 0:140 ==> next ntpdpd:3303:120 3303 [000] 7071.988916: (sched_switch) prev 3303:120 ==> next swapper:0:140 0 [000] 7072.020370: (sched_wakeup) task 16 success=1 0 [000] 7072.020407: (sched_switch) prev 0:140 ==> next events/0:16:115 16 [000] 7071.936157: (sched_switch) prev 16:115 ==> next swapper:0:140 Much better. I just used the same binary image. The bug was in the perl script. -- Steve -- 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/