From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751462AbcEKHn7 (ORCPT ); Wed, 11 May 2016 03:43:59 -0400 Received: from mx2.suse.de ([195.135.220.15]:59875 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751320AbcEKHn6 (ORCPT ); Wed, 11 May 2016 03:43:58 -0400 Message-ID: <1462952635.3961.15.camel@suse.de> Subject: Re: [RFC][PATCH 5/7] sched: Rewrite select_idle_siblings() From: Mike Galbraith To: Yuyang Du , Peter Zijlstra Cc: mingo@kernel.org, linux-kernel@vger.kernel.org, clm@fb.com, matt@codeblueprint.co.uk, tglx@linutronix.de, fweisbec@gmail.com Date: Wed, 11 May 2016 09:43:55 +0200 In-Reply-To: <20160510234230.GC4870@intel.com> References: <20160509104807.284575300@infradead.org> <20160509105210.703304637@infradead.org> <20160510210550.GB4870@intel.com> <20160511070029.GE3193@twins.programming.kicks-ass.net> <20160510234230.GC4870@intel.com> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.16.5 Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 2016-05-11 at 07:42 +0800, Yuyang Du wrote: > Do you have any suggestion about doing other part of > select_task_rq_fair? Conjure up a decent metric for placing tasks in tasty hot L2? That would be really lovely to have (/me pondering page faults..). We used to have an avg_overlap heuristic, which would let us stack high speed ping-pong like things such that they could really smoke. It was too fragile though, so had to go away. -Mike