From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751300AbZKJFN2 (ORCPT ); Tue, 10 Nov 2009 00:13:28 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750822AbZKJFN2 (ORCPT ); Tue, 10 Nov 2009 00:13:28 -0500 Received: from mx3.mail.elte.hu ([157.181.1.138]:38283 "EHLO mx3.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750811AbZKJFN1 (ORCPT ); Tue, 10 Nov 2009 00:13:27 -0500 Date: Tue, 10 Nov 2009 06:13:21 +0100 From: Ingo Molnar To: Frederic Weisbecker Cc: LKML , Peter Zijlstra , Arnaldo Carvalho de Melo , Mike Galbraith , Paul Mackerras , Thomas Gleixner Subject: Re: [RFC PATCH 0/4] perf/core: Small event scheduling changes Message-ID: <20091110051321.GE7897@elte.hu> References: <1257711206-12243-1-git-send-email-fweisbec@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1257711206-12243-1-git-send-email-fweisbec@gmail.com> User-Agent: Mutt/1.5.20 (2009-08-17) X-ELTE-SpamScore: -1.5 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-1.5 required=5.9 tests=BAYES_00 autolearn=no SpamAssassin version=3.2.5 -1.5 BAYES_00 BODY: Bayesian spam probability is 0 to 1% [score: 0.0000] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org * Frederic Weisbecker wrote: > Hi, > > This is an rfc patchset, only compile tested just to ensure I'm taking > a good direction before going ahead. > > This is intended to rework a bit the perf event scheduling to > guarantee a real priority of the pinned events over the volatile ones. > This patchset handles such priority on task tick time only. But if the > idea is agreed, I could expand that to every task event sched-in calls > to guarantee the priority in every event rescheduling time. > > Thanks. > > Frederic Weisbecker (4): > perf/core: split context's event group list into pinned and > non-pinned lists > perf/core: Optimize a bit rotate_ctx() > perf/core: Split up pinned and non pinned processing > perf/core: Schedule every pinned events before the the non-pinned > > include/linux/perf_event.h | 3 +- > kernel/perf_event.c | 283 ++++++++++++++++++++++++++++++++----------- > 2 files changed, 212 insertions(+), 74 deletions(-) Sans the small naming suggestions i had, the general principle looks good to me - it's a nice restructuring of the various scheduling rules we have for events. Ingo