Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261729AbVASOMe (ORCPT ); Wed, 19 Jan 2005 09:12:34 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261730AbVASOMe (ORCPT ); Wed, 19 Jan 2005 09:12:34 -0500 Received: from relay.snowman.net ([66.92.160.56]:19465 "EHLO relay.snowman.net") by vger.kernel.org with ESMTP id S261729AbVASOM0 (ORCPT ); Wed, 19 Jan 2005 09:12:26 -0500 Date: Wed, 19 Jan 2005 09:11:15 -0500 From: Stephen Frost To: Benjamin Herrenschmidt Cc: Tony Lindgren , Pavel Machek , George Anzinger , john stultz , Andrea Arcangeli , Zwane Mwaikambo , Con Kolivas , Martin Schwidefsky , Linux Kernel list Subject: Re: [PATCH] dynamic tick patch Message-ID: <20050119141115.GI10437@ns.snowman.net> Mail-Followup-To: Benjamin Herrenschmidt , Tony Lindgren , Pavel Machek , George Anzinger , john stultz , Andrea Arcangeli , Zwane Mwaikambo , Con Kolivas , Martin Schwidefsky , Linux Kernel list References: <20050119000556.GB14749@atomide.com> <1106108467.4500.169.camel@gaston> <20050119050701.GA19542@atomide.com> <1106112525.4534.175.camel@gaston> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="S1TpPISuMFJtSn3D" Content-Disposition: inline In-Reply-To: <1106112525.4534.175.camel@gaston> X-Editor: Vim http://www.vim.org/ X-Info: http://www.snowman.net X-Operating-System: Linux/2.4.24ns.3.0 (i686) X-Uptime: 09:04:42 up 354 days, 9:00, 7 users, load average: 0.10, 0.17, 0.13 User-Agent: Mutt/1.5.6+20040907i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1589 Lines: 42 --S1TpPISuMFJtSn3D Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable * Benjamin Herrenschmidt (benh@kernel.crashing.org) wrote: > Hrm... reading more of the patch & Martin's previous work, I'm not sure > I like the idea too much in the end... The main problem is that you are > just "replaying" the ticks afterward, which I see as a problem for > things like sched_clock() which returns the real current time, no ? >=20 > I'll toy a bit with my own implementation directly using Martin's work > and see what kind of improvement I really get on ppc laptops. I don't know if this is the same thing, or the same issue, but I've noticed on my Windows machines that the longer my laptop sleeps the longer it takes for it to wake back up- my guess is that it's doing exactly this (replaying ticks). It *really* sucks though because it can take quite a while for it to come back if it's been asleep for a while. Stephen --S1TpPISuMFJtSn3D Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.5 (GNU/Linux) iD8DBQFB7mqCrzgMPqB3kigRAvDJAJoCODq7uqyk+SFhAc64+mq8n6woEwCfZ06b nKXq1FAiXk+QKlK0QqPNWJA= =btXW -----END PGP SIGNATURE----- --S1TpPISuMFJtSn3D-- - 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/