Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751284AbVLaBDL (ORCPT ); Fri, 30 Dec 2005 20:03:11 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751297AbVLaBDL (ORCPT ); Fri, 30 Dec 2005 20:03:11 -0500 Received: from smtp.osdl.org ([65.172.181.4]:38047 "EHLO smtp.osdl.org") by vger.kernel.org with ESMTP id S1751284AbVLaBDJ (ORCPT ); Fri, 30 Dec 2005 20:03:09 -0500 Date: Fri, 30 Dec 2005 17:02:46 -0800 (PST) From: Linus Torvalds To: Lee Revell cc: Ingo Molnar , Dave Jones , Hugh Dickins , linux-kernel Subject: Re: [patch] latency tracer, 2.6.15-rc7 In-Reply-To: <1135990270.31111.46.camel@mindpipe> Message-ID: References: <1135726300.22744.25.camel@mindpipe> <1135814419.7680.13.camel@mindpipe> <20051229082217.GA23052@elte.hu> <20051229100233.GA12056@redhat.com> <20051229101736.GA2560@elte.hu> <1135887072.6804.9.camel@mindpipe> <1135887966.6804.11.camel@mindpipe> <20051229202848.GC29546@elte.hu> <1135908980.4568.10.camel@mindpipe> <20051230080032.GA26152@elte.hu> <1135990270.31111.46.camel@mindpipe> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 564 Lines: 19 On Fri, 30 Dec 2005, Lee Revell wrote: > > It seems that the networking code's use of RCU can cause 10ms+ > latencies: Hmm. Is there a big jump at the 10ms mark? Do you have a 100Hz timer source? A latency jump at 10ms would tend to indicate a missed wakeup that was "picked up" by the next timer tick. Linus - 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/