From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262106AbUHMLbo (ORCPT ); Fri, 13 Aug 2004 07:31:44 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262380AbUHMLbo (ORCPT ); Fri, 13 Aug 2004 07:31:44 -0400 Received: from mail.gmx.net ([213.165.64.20]:36540 "HELO mail.gmx.net") by vger.kernel.org with SMTP id S262106AbUHMLa6 (ORCPT ); Fri, 13 Aug 2004 07:30:58 -0400 X-Authenticated: #4399952 Date: Fri, 13 Aug 2004 13:41:01 +0200 From: Florian Schmidt To: Ingo Molnar Cc: Lee Revell , linux-kernel , Felipe Alfaro Solana Subject: Re: [patch] voluntary-preempt-2.6.8-rc4-O7 Message-Id: <20040813134101.06568416@mango.fruits.de> In-Reply-To: <20040813104817.GI8135@elte.hu> References: <20040726083537.GA24948@elte.hu> <1090832436.6936.105.camel@mindpipe> <20040726124059.GA14005@elte.hu> <20040726204720.GA26561@elte.hu> <20040729222657.GA10449@elte.hu> <20040801193043.GA20277@elte.hu> <20040809104649.GA13299@elte.hu> <20040810132654.GA28915@elte.hu> <20040812235116.GA27838@elte.hu> <1092382825.3450.19.camel@mindpipe> <20040813104817.GI8135@elte.hu> X-Mailer: Sylpheed-Claws 0.9.12 (GTK+ 1.2.10; i386-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 On Fri, 13 Aug 2004 12:48:17 +0200 Ingo Molnar wrote: > in -O7 i've added a runtime flag to disable/enable tracing without > having to recompile the kernel: > > http://redhat.com/~mingo/voluntary-preempt/voluntary-preempt-2.6.8-rc4-O7 I have one question: Are kernel frame pointers required for the latency traces? I had frame pointers on in my kernel config but wonder if they are nessecary or if i can save the cycles and kb [i'm not too big on kernel internals, so forgive the possibly stupid question]?.. The other thing i wanted to say is: way to go man!! These patches rock my linux audio world. A big thank you from me and [probably] the whole linux audio community for the work you put into this! Compiling O7 right now with traces enabled, so i'll send a trace soon about the ca 300 us latencies i see. Flo -- Palimm Palimm! http://affenbande.org/~tapas/