From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jarek Poplawski Subject: Re: loaded router, excessive getnstimeofday in oprofile Date: Tue, 26 Aug 2008 11:15:45 +0000 Message-ID: <20080826111545.GD2609@ff.dom.local> References: <20080826095126.GA2609@ff.dom.local> <200808261329.53741.denys@visp.net.lb> <20080826104717.GB2609@ff.dom.local> <200808261349.09820.denys@visp.net.lb> <20080826110746.GC2609@ff.dom.local> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org To: Denys Fedoryshchenko Return-path: Received: from ug-out-1314.google.com ([66.249.92.169]:14613 "EHLO ug-out-1314.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753459AbYHZLPw (ORCPT ); Tue, 26 Aug 2008 07:15:52 -0400 Received: by ug-out-1314.google.com with SMTP id c2so713687ugf.37 for ; Tue, 26 Aug 2008 04:15:50 -0700 (PDT) Content-Disposition: inline In-Reply-To: <20080826110746.GC2609@ff.dom.local> Sender: netdev-owner@vger.kernel.org List-ID: On Tue, Aug 26, 2008 at 11:07:46AM +0000, Jarek Poplawski wrote: > On Tue, Aug 26, 2008 at 01:49:09PM +0300, Denys Fedoryshchenko wrote: ... > > Maybe it can be optional, and enabled via kernel parameter and /sys , so it > > can be useful in case of crashes when TSC used and when timer is too slow. > > Because it is not so useful just to disable hrtimers completely, if you need > > them for some other task... > > Maybe it could be enough to use current parameters like: "highres=off" > according to Documentation/kernel-parameters.txt? Hmm.. it isn't actually answer to your question, sorry. As I said before I think we need to have more people interested in using such additional options, and btw. I understood from your message that disabling htb didn't solve the problem? Jarek P.