From patchwork Thu Oct 25 10:26:11 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: preeti X-Patchwork-Id: 1643091 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork2.kernel.org Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) by patchwork2.kernel.org (Postfix) with ESMTP id 694B7DF2F7 for ; Thu, 25 Oct 2012 10:33:07 +0000 (UTC) Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1TRKhz-0003dF-IO; Thu, 25 Oct 2012 10:30:41 +0000 Received: from e23smtp01.au.ibm.com ([202.81.31.143]) by merlin.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1TRKel-0001LQ-4j for linux-arm-kernel@lists.infradead.org; Thu, 25 Oct 2012 10:27:28 +0000 Received: from /spool/local by e23smtp01.au.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Thu, 25 Oct 2012 20:24:08 +1000 Received: from d23relay03.au.ibm.com (202.81.31.245) by e23smtp01.au.ibm.com (202.81.31.207) with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted; Thu, 25 Oct 2012 20:24:05 +1000 Received: from d23av04.au.ibm.com (d23av04.au.ibm.com [9.190.235.139]) by d23relay03.au.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id q9PAQbgE000398 for ; Thu, 25 Oct 2012 21:26:37 +1100 Received: from d23av04.au.ibm.com (loopback [127.0.0.1]) by d23av04.au.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id q9PAQZqq006900 for ; Thu, 25 Oct 2012 21:26:37 +1100 Received: from preeti.in.ibm.com (preeti.in.ibm.com [9.124.35.56]) by d23av04.au.ibm.com (8.14.4/8.13.1/NCO v10.0 AVin) with ESMTP id q9PAQTM2006171; Thu, 25 Oct 2012 21:26:30 +1100 Subject: [RFC PATCH 12/13] sched: Modify find_idlest_cpu to use PJT's metric To: svaidy@linux.vnet.ibm.com, linux-kernel@vger.kernel.org From: Preeti U Murthy Date: Thu, 25 Oct 2012 15:56:11 +0530 Message-ID: <20121025102611.21022.23199.stgit@preeti.in.ibm.com> In-Reply-To: <20121025102045.21022.92489.stgit@preeti.in.ibm.com> References: <20121025102045.21022.92489.stgit@preeti.in.ibm.com> User-Agent: StGit/0.16-38-g167d MIME-Version: 1.0 x-cbid: 12102510-1618-0000-0000-000002B617A8 X-Spam-Note: CRM114 invocation failed X-Spam-Score: -1.9 (-) X-Spam-Report: SpamAssassin version 3.3.2 on merlin.infradead.org summary: Content analysis details: (-1.9 points) pts rule name description ---- ---------------------- -------------------------------------------------- -2.3 RCVD_IN_DNSWL_MED RBL: Sender listed at http://www.dnswl.org/, medium trust [202.81.31.143 listed in list.dnswl.org] 3.0 KHOP_BIG_TO_CC Sent to 10+ recipients instaed of Bcc or a list -0.7 RP_MATCHES_RCVD Envelope sender domain matches handover relay domain -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] Cc: Morten.Rasmussen@arm.com, venki@google.com, robin.randhawa@arm.com, linaro-dev@lists.linaro.org, a.p.zijlstra@chello.nl, mjg59@srcf.ucam.org, viresh.kumar@linaro.org, amit.kucheria@linaro.org, deepthi@linux.vnet.ibm.com, Arvind.Chauhan@arm.com, paul.mckenney@linaro.org, suresh.b.siddha@intel.com, tglx@linutronix.de, srivatsa.bhat@linux.vnet.ibm.com, vincent.guittot@linaro.org, akpm@linux-foundation.org, paulmck@linux.vnet.ibm.com, arjan@linux.intel.com, mingo@kernel.org, linux-arm-kernel@lists.infradead.org, pjt@google.com X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: linux-arm-kernel-bounces@lists.infradead.org Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org Additional parameters introduced to perform this function which are calculated using PJT's metrics and its helpers. Signed-off-by: Preeti U Murthy --- kernel/sched/fair.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index c64be1c1..15ec528 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -3230,16 +3230,18 @@ find_idlest_group(struct sched_domain *sd, struct task_struct *p, static int find_idlest_cpu(struct sched_group *group, struct task_struct *p, int this_cpu) { - unsigned long load, min_load = ULONG_MAX; + unsigned long load; + u64 cpu_load, min_cpu_load = ~0ULL; int idlest = -1; int i; /* Traverse only the allowed CPUs */ for_each_cpu_and(i, sched_group_cpus(group), tsk_cpus_allowed(p)) { load = weighted_cpuload(i); + cpu_load = cpu_rq(i)->cfs.runnable_load_avg; - if (load < min_load || (load == min_load && i == this_cpu)) { - min_load = load; + if (cpu_load < min_cpu_load || (cpu_load == min_cpu_load && i == this_cpu)) { + min_cpu_load = cpu_load; idlest = i; } }