From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andi Kleen Subject: Re: loaded router, excessive getnstimeofday in oprofile Date: Wed, 27 Aug 2008 14:54:12 +0200 Message-ID: <87vdxmr53f.fsf@basil.nowhere.org> References: <200808220457.40892.denys@visp.net.lb> <20080826201406.GA24827@2ka.mipt.ru> <48B46B48.7030609@cosmosbay.com> <20080826205158.GA15266@2ka.mipt.ru> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Eric Dumazet , Denys Fedoryshchenko , netdev@vger.kernel.org, linux-kernel@vger.kernel.org To: Evgeniy Polyakov Return-path: Received: from one.firstfloor.org ([213.235.205.2]:59678 "EHLO one.firstfloor.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754036AbYH0MyV (ORCPT ); Wed, 27 Aug 2008 08:54:21 -0400 In-Reply-To: <20080826205158.GA15266@2ka.mipt.ru> (Evgeniy Polyakov's message of "Wed, 27 Aug 2008 00:51:58 +0400") Sender: netdev-owner@vger.kernel.org List-ID: Evgeniy Polyakov writes: > > Yup, this innocent toys can end up with this such behaviour on modern > highly loaded machines. I and also other people had some patches to move the time stamp measuring into the socket. This way the time stamping didn't need to be enabled on all packets, only on those that actually end up at a socket that requires the time stamp. Unfortunately DaveM didn't like it because some bank wanted different semantics, see the discussion in http://thread.gmane.org/gmane.linux.network/91679 Perhaps you can find out which bank it was and send them a bill for your CPU time ;-) -Andi -- ak@linux.intel.com