Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933212Ab0KPXcS (ORCPT ); Tue, 16 Nov 2010 18:32:18 -0500 Received: from hrndva-omtalb.mail.rr.com ([71.74.56.124]:44787 "EHLO hrndva-omtalb.mail.rr.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933140Ab0KPXcR (ORCPT ); Tue, 16 Nov 2010 18:32:17 -0500 X-Authority-Analysis: v=1.1 cv=kXGwZUU/u1JTMRv8Axk4W0omja+vfTT+sGlOkodD8F8= c=1 sm=0 a=T9ZRXmIXaAQA:10 a=Q9fys5e9bTEA:10 a=OPBmh+XkhLl+Enan7BmTLg==:17 a=8Lvq5K3y5wzke61OadwA:9 a=2RjfZYG0sXddb-DixYZ9wtJNHQkA:4 a=PUjeQqilurYA:10 a=OPBmh+XkhLl+Enan7BmTLg==:117 X-Cloudmark-Score: 0 X-Originating-IP: 67.242.120.143 Subject: Re: Benchmarks of kernel tracing options (ftrace and ktrace) From: Steven Rostedt To: David Sharp Cc: linux-kernel@vger.kernel.org, Mathieu Desnoyers , Ingo Molnar , Andrew Morton , Michael Rubin , Frederic Weisbecker In-Reply-To: References: <1287013830.3673.224.camel@frodo> Content-Type: text/plain; charset="ISO-8859-15" Date: Tue, 16 Nov 2010 18:32:15 -0500 Message-ID: <1289950335.30543.8.camel@gandalf.stny.rr.com> Mime-Version: 1.0 X-Mailer: Evolution 2.30.3 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 709 Lines: 22 On Tue, 2010-11-16 at 15:27 -0800, David Sharp wrote: > Steve, Mike told me that you may have some patches to improve overhead > of syscall tracing. I'd be interested in testing them. Can you send > them my way? Mike may have been confused ;-) I did tell him that some ring buffer improvements did make it into the kernel. You might want to try the latest mainline again. I even have other patches that might help. I'll have to go and dig them up. -- 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/