From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mike Galbraith Subject: Re: [PATCH v2 0/4] Utilization estimation (util_est) for FAIR tasks Date: Wed, 13 Dec 2017 18:56:33 +0100 Message-ID: <1513187793.7297.26.camel@gmx.de> References: <20171205171018.9203-1-patrick.bellasi@arm.com> Mime-Version: 1.0 Content-Type: text/plain; charset="ISO-8859-15" Content-Transfer-Encoding: 8BIT Return-path: Received: from mout.gmx.net ([212.227.15.15]:54846 "EHLO mout.gmx.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752434AbdLMR5g (ORCPT ); Wed, 13 Dec 2017 12:57:36 -0500 In-Reply-To: <20171205171018.9203-1-patrick.bellasi@arm.com> Sender: linux-pm-owner@vger.kernel.org List-Id: linux-pm@vger.kernel.org To: Patrick Bellasi , linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org Cc: Ingo Molnar , Peter Zijlstra , "Rafael J . Wysocki" , Viresh Kumar , Vincent Guittot , Paul Turner , Dietmar Eggemann , Morten Rasmussen , Juri Lelli , Todd Kjos , Joel Fernandes On Tue, 2017-12-05 at 17:10 +0000, Patrick Bellasi wrote: > This is a respin of: > https://lkml.org/lkml/2017/11/9/546 > which has been rebased on v4.15-rc2 to have util_est now working on top > of the recent PeterZ's: > [PATCH -v2 00/18] sched/fair: A bit of a cgroup/PELT overhaul > > The aim of this series is to improve some PELT behaviors to make it a > better fit for the scheduling of tasks common in embedded mobile > use-cases, without affecting other classes of workloads. I thought perhaps this patch set would improve the below behavior, but alas it does not.  That's 3 instances of firefox playing youtube clips being shoved into a corner by hogs sitting on 7 of 8 runqueues.  PELT serializes the threaded desktop, making that threading kinda pointless, and CFS not all that fair. 6569 root 20 0 4048 704 628 R 100.0 0.004 5:10.48 7 cpuhog 6573 root 20 0 4048 712 636 R 100.0 0.004 5:07.47 5 cpuhog 6581 root 20 0 4048 696 620 R 100.0 0.004 5:07.36 1 cpuhog 6585 root 20 0 4048 812 736 R 100.0 0.005 5:08.14 4 cpuhog 6589 root 20 0 4048 712 636 R 100.0 0.004 5:06.42 6 cpuhog 6577 root 20 0 4048 720 644 R 99.80 0.005 5:06.52 3 cpuhog 6593 root 20 0 4048 728 652 R 99.60 0.005 5:04.25 0 cpuhog 6755 mikeg 20 0 2714788 885324 179196 S 19.96 5.544 2:14.36 2 Web Content 6620 mikeg 20 0 2318348 312336 145044 S 8.383 1.956 0:51.51 2 firefox 3190 root 20 0 323944 71704 42368 S 3.194 0.449 0:11.90 2 Xorg 3718 root 20 0 3009580 67112 49256 S 0.599 0.420 0:02.89 2 kwin_x11 3761 root 20 0 769760 90740 62048 S 0.399 0.568 0:03.46 2 konsole 3845 root 9 -11 791224 20132 14236 S 0.399 0.126 0:03.00 2 pulseaudio 3722 root 20 0 3722308 172568 88088 S 0.200 1.081 0:04.35 2 plasmashel ------------------------------------------------------------------------------------------------------------------------------------ Task | Runtime ms | Switches | Average delay ms | Maximum delay ms | Sum delay ms | Maximum delay at | ------------------------------------------------------------------------------------------------------------------------------------ Web Content:6755 | 2864.862 ms | 7314 | avg: 0.299 ms | max: 40.374 ms | sum: 2189.472 ms | max at: 375.769240 | Compositor:6680 | 1889.847 ms | 4672 | avg: 0.531 ms | max: 29.092 ms | sum: 2478.559 ms | max at: 375.759405 | MediaPl~back #3:(13) | 3269.777 ms | 7853 | avg: 0.218 ms | max: 19.451 ms | sum: 1711.635 ms | max at: 391.123970 | MediaPl~back #4:(10) | 1472.986 ms | 8189 | avg: 0.236 ms | max: 18.653 ms | sum: 1933.886 ms | max at: 376.124211 | MediaPl~back #1:(9) | 601.788 ms | 6598 | avg: 0.247 ms | max: 17.823 ms | sum: 1627.852 ms | max at: 401.122567 | firefox:6620 | 303.181 ms | 6232 | avg: 0.111 ms | max: 15.602 ms | sum: 691.865 ms | max at: 385.078558 | Socket Thread:6639 | 667.537 ms | 4806 | avg: 0.069 ms | max: 12.638 ms | sum: 329.387 ms | max at: 380.827323 | MediaPD~oder #1:6835 | 154.737 ms | 1592 | avg: 0.700 ms | max: 10.139 ms | sum: 1113.688 ms | max at: 392.575370 | MediaTimer #1:6828 | 42.660 ms | 5250 | avg: 0.575 ms | max: 9.845 ms | sum: 3018.994 ms | max at: 380.823677 | MediaPD~oder #2:6840 | 150.822 ms | 1583 | avg: 0.703 ms | max: 9.639 ms | sum: 1112.962 ms | max at: 380.823741 | ...