Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932421AbXBULeY (ORCPT ); Wed, 21 Feb 2007 06:34:24 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932446AbXBULeY (ORCPT ); Wed, 21 Feb 2007 06:34:24 -0500 Received: from one.firstfloor.org ([213.235.205.2]:60399 "EHLO one.firstfloor.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932421AbXBULeN (ORCPT ); Wed, 21 Feb 2007 06:34:13 -0500 Date: Wed, 21 Feb 2007 12:34:09 +0100 From: Andi Kleen To: Evgeniy Polyakov Cc: bert hubert , Andi Kleen , netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: all syscalls initially taking 4usec on a P4? Re: nonblocking UDPv4 recvfrom() taking 4usec @ 3GHz? Message-ID: <20070221113409.GA28479@one.firstfloor.org> References: <20070219231447.GA4400@outpost.ds9a.nl> <20070220162714.GA3245@outpost.ds9a.nl> <20070220164124.GA24930@2ka.mipt.ru> <20070220170232.GA4730@outpost.ds9a.nl> <20070220171120.GD24930@2ka.mipt.ru> <20070221110634.GA30394@2ka.mipt.ru> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20070221110634.GA30394@2ka.mipt.ru> User-Agent: Mutt/1.4.2.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 504 Lines: 14 On Wed, Feb 21, 2007 at 02:06:34PM +0300, Evgeniy Polyakov wrote: > Here is data for 50 bytes reading for essentially idle machine > (core duo 2.4 ghz): > > delta for syscall: 3326961404-3326969261: 7857 cycles = 3.273750 us Can you oprofile it too? -Andi - 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/