From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1422769AbXDYVr6 (ORCPT ); Wed, 25 Apr 2007 17:47:58 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1422768AbXDYVr6 (ORCPT ); Wed, 25 Apr 2007 17:47:58 -0400 Received: from mx2.mail.elte.hu ([157.181.151.9]:55380 "EHLO mx2.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1422769AbXDYVr5 (ORCPT ); Wed, 25 Apr 2007 17:47:57 -0400 Date: Wed, 25 Apr 2007 23:47:04 +0200 From: Ingo Molnar To: linux-kernel@vger.kernel.org Cc: Linus Torvalds , Andrew Morton , Con Kolivas , Nick Piggin , Mike Galbraith , Arjan van de Ven , Peter Williams , Thomas Gleixner , caglar@pardus.org.tr, Willy Tarreau , Gene Heskett , Mark Lord , Zach Carter , buddabrod Subject: [patch] CFS scheduler, -v6 Message-ID: <20070425214704.GA32572@elte.hu> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.4.2.2i X-ELTE-VirusStatus: clean X-ELTE-SpamScore: -2.0 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-2.0 required=5.9 tests=BAYES_00 autolearn=no SpamAssassin version=3.1.7 -2.0 BAYES_00 BODY: Bayesian spam probability is 0 to 1% [score: 0.0000] Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org i'm pleased to announce release -v6 of the CFS scheduler patchset. The main goal of CFS is to implement "high quality desktop scheduling" as well as technically possible. The CFS patch against v2.6.21-rc7 or against v2.6.20.7 can be downloaded from the usual place: http://redhat.com/~mingo/cfs-scheduler/ i got lots of -v5 feedback (thanks and please keep the reports coming!) so the -v6 release includes many bugfixes and improvements: 19 files changed, 317 insertions(+), 744 deletions(-) the biggest user-visible changes in -v6 are various refinements to the precise-scheduling infrastructure that should result in generally better interactivity and a smoother desktop. In particular a number of "movie playback lags/stutters" and "firefox lags under load" type of regressions have been resolved. (Please re-report any regression that might not be fixed yet.) Changes since -v5: - feature: increase the preemption granularity value on SMP systems. Idea and code comes from the SD scheduler of Con Kolivas, with Con's kind permission. (thanks Con!) - fix: the "privileged_nice_level=X" boot option should convert signed integers. (Mike Galbraith) - build fix: yield_to unistd.h fix (Srivatsa Vaddagiri) - build fix: CONFIG_HEADERS_CHECK complained about sched.h. (reported by Zach Carter) - build fix: normalize_rt_tasks() UP build fix. (Mike Galbraith) - interactivity fix: sched_clock() accuracy fixes. This should resolve certain types of interactivity regressions reported on systems that change their CPU frequencies. (mainly laptops) - default settings tweak: changed the X renicing default from -19 to -10, based on tester feedback. (Might still be too much - more feedback is needed.) - feature: introduced "wakeup granularity" and added the /proc/sys/kernel/sched_wakeup_granularity_ns tunable, set to 0 by default for now. This is now distinct from the sched_granularity_ns 'preemption granularity' property of the scheduler - allowing a more agressive increase in the preemption granularity without jeopardizing interactivity. - debugging feature: SysRq-T now also shows the /proc/sched_debug output - useful to generate a dump of all relevant scheduler state in one easy step. - debugging feature: make SysRq-Nice normalize negative nice level tasks too and reset the CFS state. - debugging: extend /proc/sched_debug with a few more clock related fields, to be able to better debug problems caused by unstable clocks. - upstream fix: SysRq-T should show runnable tasks - optimization: introduce p->load_shift to simplify the 64-bit math on 32-bit systems and avoid expensive 64-bit divisions. - cleanup: renamed CONFIG_RENICE_X to CONFIG_BOOST_X. - cleanup: got rid of more unused code from sched.c - lots of other smaller stuff i forgot :) As usual, any sort of feedback, bugreport, fix and suggestion is more than welcome, Ingo