From patchwork Fri May 30 06:36:07 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yuyang Du X-Patchwork-Id: 4271301 Return-Path: X-Original-To: patchwork-linux-pm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 62F24BEEA7 for ; Fri, 30 May 2014 14:43:32 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 93AFF20396 for ; Fri, 30 May 2014 14:43:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4F57220171 for ; Fri, 30 May 2014 14:43:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933271AbaE3OnF (ORCPT ); Fri, 30 May 2014 10:43:05 -0400 Received: from mga09.intel.com ([134.134.136.24]:29743 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S964876AbaE3Olj (ORCPT ); Fri, 30 May 2014 10:41:39 -0400 Received: from orsmga002.jf.intel.com ([10.7.209.21]) by orsmga102.jf.intel.com with ESMTP; 30 May 2014 07:36:27 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.98,941,1392192000"; d="scan'208";a="548947133" Received: from dalvikqa005-desktop.bj.intel.com ([10.238.151.105]) by orsmga002.jf.intel.com with ESMTP; 30 May 2014 07:41:33 -0700 From: Yuyang Du To: mingo@redhat.com, peterz@infradead.org, rafael.j.wysocki@intel.com, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org Cc: arjan.van.de.ven@intel.com, len.brown@intel.com, alan.cox@intel.com, mark.gross@intel.com, pjt@google.com, bsegall@google.com, morten.rasmussen@arm.com, vincent.guittot@linaro.org, rajeev.d.muralidhar@intel.com, vishwesh.m.rudramuni@intel.com, nicole.chalhoub@intel.com, ajaya.durg@intel.com, harinarayanan.seshadri@intel.com, jacob.jun.pan@linux.intel.com, fengguang.wu@intel.com, yuyang.du@intel.com Subject: [RFC PATCH 11/16 v3] Make wakeup bias threshold changeable via sysctl Date: Fri, 30 May 2014 14:36:07 +0800 Message-Id: <1401431772-14320-12-git-send-email-yuyang.du@intel.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1401431772-14320-1-git-send-email-yuyang.du@intel.com> References: <1401431772-14320-1-git-send-email-yuyang.du@intel.com> Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org X-Spam-Status: No, score=-6.0 required=5.0 tests=BAYES_00, DATE_IN_PAST_06_12, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP In wakeup balance, we bias wakee and waker (in this order) if it is capable of handling the wakee task. sysctl_sched_cc_wakeup_threshold is the threshold to see whether the CPU is capable, and can be changed by sysctl tool Signed-off-by: Yuyang Du --- include/linux/sched/sysctl.h | 1 + kernel/sysctl.c | 7 +++++++ 2 files changed, 8 insertions(+) diff --git a/include/linux/sched/sysctl.h b/include/linux/sched/sysctl.h index f8a3e0a..f1e90c7 100644 --- a/include/linux/sched/sysctl.h +++ b/include/linux/sched/sysctl.h @@ -38,6 +38,7 @@ extern unsigned int sysctl_sched_child_runs_first; #ifdef CONFIG_SMP extern unsigned int sysctl_sched_cc_sum_period; +extern unsigned int sysctl_sched_cc_wakeup_threshold; #endif enum sched_tunable_scaling { diff --git a/kernel/sysctl.c b/kernel/sysctl.c index 13aea95..77a5aa5 100644 --- a/kernel/sysctl.c +++ b/kernel/sysctl.c @@ -1098,6 +1098,13 @@ static struct ctl_table kern_table[] = { .mode = 0644, .proc_handler = proc_dointvec, }, + { + .procname = "sched_cc_wakeup_threshold", + .data = &sysctl_sched_cc_wakeup_threshold, + .maxlen = sizeof(sysctl_sched_cc_wakeup_threshold), + .mode = 0644, + .proc_handler = proc_dointvec, + }, #endif { } };