From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262605AbUHMLeY (ORCPT ); Fri, 13 Aug 2004 07:34:24 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262730AbUHMLeX (ORCPT ); Fri, 13 Aug 2004 07:34:23 -0400 Received: from mx2.elte.hu ([157.181.151.9]:57309 "EHLO mx2.elte.hu") by vger.kernel.org with ESMTP id S262605AbUHMLeK (ORCPT ); Fri, 13 Aug 2004 07:34:10 -0400 Date: Fri, 13 Aug 2004 13:35:46 +0200 From: Ingo Molnar To: Florian Schmidt Cc: Lee Revell , linux-kernel , Felipe Alfaro Solana Subject: Re: [patch] voluntary-preempt-2.6.8-rc4-O7 Message-ID: <20040813113546.GA17394@elte.hu> References: <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> <20040813134101.06568416@mango.fruits.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20040813134101.06568416@mango.fruits.de> User-Agent: Mutt/1.4.1i X-ELTE-SpamVersion: MailScanner 4.31.6-itk1 (ELTE 1.2) SpamAssassin 2.63 ClamAV 0.73 X-ELTE-VirusStatus: clean X-ELTE-SpamCheck: no X-ELTE-SpamCheck-Details: score=-4.9, required 5.9, autolearn=not spam, BAYES_00 -4.90 X-ELTE-SpamLevel: X-ELTE-SpamScore: -4 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org * Florian Schmidt 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]?.. -pg requires frame pointers, yes. The Kconfig change i did forces framepointers on so it's automatic. (gcc bails out with an error on -pg -fomit-frame-pointer) > 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! you are welcome! Ingo