From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932563Ab2IUScb (ORCPT ); Fri, 21 Sep 2012 14:32:31 -0400 Received: from service87.mimecast.com ([91.220.42.44]:36634 "EHLO service87.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755071Ab2IUSc0 (ORCPT ); Fri, 21 Sep 2012 14:32:26 -0400 From: morten.rasmussen@arm.com To: paulmck@linux.vnet.ibm.com, pjt@google.com, peterz@infradead.org, suresh.b.siddha@intel.com Cc: morten.rasmussen@arm.com, linaro-sched-sig@lists.linaro.org, linaro-dev@lists.linaro.org, linux-kernel@vger.kernel.org Subject: [RFC PATCH 01/10] sched: entity load-tracking load_avg_ratio Date: Fri, 21 Sep 2012 19:32:16 +0100 Message-Id: <1348252345-5642-2-git-send-email-morten.rasmussen@arm.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1348252345-5642-1-git-send-email-morten.rasmussen@arm.com> References: <1348252345-5642-1-git-send-email-morten.rasmussen@arm.com> X-OriginalArrivalTime: 21 Sep 2012 18:32:23.0491 (UTC) FILETIME=[71420130:01CD9827] X-MC-Unique: 112092119322404401 Content-Type: text/plain; charset=WINDOWS-1252 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by mail.home.local id q8LIXBtG011340 From: Morten Rasmussen This patch adds load_avg_ratio to each task. The load_avg_ratio is a variant of load_avg_contrib which is not scaled by the task priority. It is calculated like this: runnable_avg_sum * NICE_0_LOAD / (runnable_avg_period + 1). Signed-off-by: Morten Rasmussen --- include/linux/sched.h | 1 + kernel/sched/fair.c | 3 +++ 2 files changed, 4 insertions(+) diff --git a/include/linux/sched.h b/include/linux/sched.h index 4dc4990..81e4e82 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -1151,6 +1151,7 @@ struct sched_avg { u64 last_runnable_update; s64 decay_count; unsigned long load_avg_contrib; + unsigned long load_avg_ratio; u32 usage_avg_sum; }; diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 095d86c..3e17dd5 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -1192,6 +1192,9 @@ static inline void __update_task_entity_contrib(struct sched_entity *se) contrib = se->avg.runnable_avg_sum * scale_load_down(se->load.weight); contrib /= (se->avg.runnable_avg_period + 1); se->avg.load_avg_contrib = scale_load(contrib); + contrib = se->avg.runnable_avg_sum * scale_load_down(NICE_0_LOAD); + contrib /= (se->avg.runnable_avg_period + 1); + se->avg.load_avg_ratio = scale_load(contrib); } /* Compute the current contribution to load_avg by se, return any delta */ -- 1.7.9.5