Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261907AbUKHRCj (ORCPT ); Mon, 8 Nov 2004 12:02:39 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261936AbUKHRBG (ORCPT ); Mon, 8 Nov 2004 12:01:06 -0500 Received: from mx1.elte.hu ([157.181.1.137]:17596 "EHLO mx1.elte.hu") by vger.kernel.org with ESMTP id S261907AbUKHPzN (ORCPT ); Mon, 8 Nov 2004 10:55:13 -0500 Date: Mon, 8 Nov 2004 17:57:18 +0100 From: Ingo Molnar To: linux-kernel@vger.kernel.org Cc: Lee Revell , Rui Nuno Capela , Mark_H_Johnson@Raytheon.com, "K.R. Foley" , Bill Huey , Adam Heath , Florian Schmidt , Thomas Gleixner , Michal Schmidt , Fernando Pablo Lopez-Lezcano , Karsten Wiese , Gunther Persoons , emann@mrv.com, Shane Shrybman Subject: [patch] Real-Time Preemption, -RT-2.6.10-rc1-mm3-V0.7.21 Message-ID: <20041108165718.GA7741@elte.hu> References: <20041020094508.GA29080@elte.hu> <20041021132717.GA29153@elte.hu> <20041022133551.GA6954@elte.hu> <20041022155048.GA16240@elte.hu> <20041022175633.GA1864@elte.hu> <20041025104023.GA1960@elte.hu> <20041027001542.GA29295@elte.hu> <20041103105840.GA3992@elte.hu> <20041106155720.GA14950@elte.hu> <20041108091619.GA9897@elte.hu> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20041108091619.GA9897@elte.hu> User-Agent: Mutt/1.4.1i X-ELTE-SpamVersion: MailScanner 4.31.6-itk1 (ELTE 1.2) SpamAssassin 2.63 ClamAV 0.73 X-ELTE-VirusStatus: clean X-ELTE-SpamCheck: no X-ELTE-SpamCheck-Details: score=-4.9, required 5.9, autolearn=not spam, BAYES_00 -4.90 X-ELTE-SpamLevel: X-ELTE-SpamScore: -4 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2020 Lines: 46 i have released the -V0.7.21 Real-Time Preemption patch, which can be downloaded from the usual place: http://redhat.com/~mingo/realtime-preempt/ this release includes fixes and debugging-improvements. Changes since -V0.7.20: - reverted the modlist_lock change - it caused more problems than it solved. - implemented irqs-off critical section timing/tracing, inspired by the positive results Thomas Gleixner got with a different kind of cli/sti tracer. To activate it, enable CONFIG_CRITICAL_TIMING and CONFIG_CRITICAL_IRQSOFF_TIMING and cli/sti latencies will be reported 'integrated' into the preempt on/off latencies. - sped up tracing in a number of ways. Performance of the tracer slowly eroded in the past week or two, it needed alignment and size fixes , inlining/branch-prediction updates and i got rid of unnecessary code. The max latency is now traced in cycles - this got rid of an expensive 64-bit division in the fastpath. (the /proc/sys tunables are still in usecs so userspace should not notice anything.) It's still not cheap but roughly 5 times faster than -V0.7.20's tracer, on a fast desktop box. - renamed CONFIG_PREEMPT_REALTIME to CONFIG_PREEMPT_RT - it's shorter. - renamed CONFIG_PREEMPT_TIMING to CONFIG_CRITICAL_TIMING and introduced CONFIG_CRITICAL_IRQSOFF_TIMING to enable cli/sti timing. to create a -V0.7.21 tree from scratch, the patching order is: http://kernel.org/pub/linux/kernel/v2.6/linux-2.6.9.tar.bz2 http://kernel.org/pub/linux/kernel/v2.6/testing/patch-2.6.10-rc1.bz2 http://kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.10-rc1/2.6.10-rc1-mm3/2.6.10-rc1-mm3.bz2 http://redhat.com/~mingo/realtime-preempt/realtime-preempt-2.6.10-rc1-mm3-V0.7.21 Ingo - 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/