From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932187AbVH3P5k (ORCPT ); Tue, 30 Aug 2005 11:57:40 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751447AbVH3P5j (ORCPT ); Tue, 30 Aug 2005 11:57:39 -0400 Received: from mail.metronet.co.uk ([213.162.97.75]:9399 "EHLO mail.metronet.co.uk") by vger.kernel.org with ESMTP id S1751446AbVH3P5j (ORCPT ); Tue, 30 Aug 2005 11:57:39 -0400 From: Alistair John Strachan To: Tony Lindgren Subject: Re: Dynamic tick for 2.6.14 - what's the plan? Date: Tue, 30 Aug 2005 17:01:49 +0100 User-Agent: KMail/1.8.90 Cc: Con Kolivas , "Theodore Ts'o" , Christopher Friesen , Lee Revell , linux-kernel , Srivatsa Vaddagiri , Thomas Renninger References: <1125354385.4598.79.camel@mindpipe> <200508301348.59357.kernel@kolivas.org> <20050830123132.GH6055@atomide.com> In-Reply-To: <20050830123132.GH6055@atomide.com> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200508301701.49228.s0348365@sms.ed.ac.uk> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Tuesday 30 August 2005 13:31, Tony Lindgren wrote: [snip] > > > > Same issue, it's waiting on dynticks before being reworked. > > Also one more minor issue; Dyntick can cause slow boots with dyntick > enabled from boot because the there's not much in the timer queue > until init. > > This probably does not show up much on x86 though because of the > short hardware timers. You could disable it until jiffies >= 0; this covers the boot criteria and still allows for moderate savings post boot (though maybe on embedded systems the delay is too long?). -- Cheers, Alistair. 'No sense being pessimistic, it probably wouldn't work anyway.' Third year Computer Science undergraduate. 1F2 55 South Clerk Street, Edinburgh, UK.