From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S266807AbUHMS5E (ORCPT ); Fri, 13 Aug 2004 14:57:04 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S266820AbUHMS5D (ORCPT ); Fri, 13 Aug 2004 14:57:03 -0400 Received: from mustang.oldcity.dca.net ([216.158.38.3]:25011 "HELO mustang.oldcity.dca.net") by vger.kernel.org with SMTP id S266807AbUHMS4y (ORCPT ); Fri, 13 Aug 2004 14:56:54 -0400 Subject: Re: [patch] Latency Tracer, voluntary-preempt-2.6.8-rc4-O6 From: Lee Revell To: Ingo Molnar Cc: linux-kernel , Felipe Alfaro Solana , Florian Schmidt In-Reply-To: <20040813102252.GG8135@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> <1092373132.3450.9.camel@mindpipe> <20040813102252.GG8135@elte.hu> Content-Type: text/plain Message-Id: <1092423450.3450.43.camel@mindpipe> Mime-Version: 1.0 X-Mailer: Ximian Evolution 1.4.6 Date: Fri, 13 Aug 2004 14:57:30 -0400 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 2004-08-13 at 06:22, Ingo Molnar wrote: > * Lee Revell wrote: > > > Interesting results. One of the problems is kallsyms_lookup, > > triggered by the printks: > > yeah - kallsyms_lookup does a linear search over thousands of symbols. > Especially since /proc/latency_trace uses it too it would be worthwile > to implement some sort of binary searching. > Would it be easier to have a mode where the symbols are not resolved, and would just require the traces to be postprocessed? Lee