From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751563AbbJLHpD (ORCPT ); Mon, 12 Oct 2015 03:45:03 -0400 Received: from mail-wi0-f179.google.com ([209.85.212.179]:34624 "EHLO mail-wi0-f179.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751116AbbJLHpB (ORCPT ); Mon, 12 Oct 2015 03:45:01 -0400 Message-ID: <1444635897.3425.19.camel@gmail.com> Subject: Re: 4.3 group scheduling regression From: Mike Galbraith To: Peter Zijlstra Cc: linux-kernel@vger.kernel.org, Yuyang Du Date: Mon, 12 Oct 2015 09:44:57 +0200 In-Reply-To: <20151012072344.GM3604@twins.programming.kicks-ass.net> References: <1444292390.3389.100.camel@gmail.com> <201510081054.t98AsL1U003456@como.maths.usyd.edu.au> <20151008111959.GM3816@twins.programming.kicks-ass.net> <1444483369.2804.9.camel@gmail.com> <20151010170142.GI3816@twins.programming.kicks-ass.net> <1444530318.3363.40.camel@gmail.com> <1444585321.4169.18.camel@gmail.com> <20151012072344.GM3604@twins.programming.kicks-ass.net> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.12.11 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 Mon, 2015-10-12 at 09:23 +0200, Peter Zijlstra wrote: > On Sun, Oct 11, 2015 at 07:42:01PM +0200, Mike Galbraith wrote: > > (change subject, CCs) > > > > On Sun, 2015-10-11 at 04:25 +0200, Mike Galbraith wrote: > > > > > > Is the interactivity the same (horrible) at fe32d3cd5e8e (ie, before the > > > > load tracking rewrite from Yuyang)? > > > > It is the rewrite, 9d89c257dfb9c51a532d69397f6eed75e5168c35. > > Just to be sure, so 9d89c257dfb9^1 is good, while 9d89c257dfb9 is bad? Yeah, I went ahead and bisected. > And *groan*, _just_ the thing I need on a monday morning ;-) Sorry 'bout that. It's odd to me that things look pretty much the same good/bad tree with hogs vs hogs or hogs vs tbench (with top anyway, just adding up times). Seems Xorg+mplayer more or less playing cross group ping-pong must be the BadThing trigger. -Mike