From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753967AbaIXM2J (ORCPT ); Wed, 24 Sep 2014 08:28:09 -0400 Received: from e34.co.us.ibm.com ([32.97.110.152]:60027 "EHLO e34.co.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751325AbaIXM2E (ORCPT ); Wed, 24 Sep 2014 08:28:04 -0400 Message-ID: <5422B8C7.6090905@linux.vnet.ibm.com> Date: Wed, 24 Sep 2014 17:57:51 +0530 From: Preeti U Murthy User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.6.0 MIME-Version: 1.0 To: Vincent Guittot , peterz@infradead.org, mingo@kernel.org, linux-kernel@vger.kernel.org, linux@arm.linux.org.uk, linux-arm-kernel@lists.infradead.org CC: riel@redhat.com, Morten.Rasmussen@arm.com, efault@gmx.de, nicolas.pitre@linaro.org, linaro-kernel@lists.linaro.org, daniel.lezcano@linaro.org, dietmar.eggemann@arm.com, pjt@google.com, bsegall@google.com Subject: Re: [PATCH v6 6/6] sched: add SD_PREFER_SIBLING for SMT level References: <1411488485-10025-1-git-send-email-vincent.guittot@linaro.org> <1411488485-10025-7-git-send-email-vincent.guittot@linaro.org> In-Reply-To: <1411488485-10025-7-git-send-email-vincent.guittot@linaro.org> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 14092412-1542-0000-0000-0000050F6747 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 09/23/2014 09:38 PM, Vincent Guittot wrote: > add the SD_PREFER_SIBLING flag for SMT level in order to ensure that > the scheduler will put at least 1 task per core. > > Signed-off-by: Vincent Guittot > --- > kernel/sched/core.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/kernel/sched/core.c b/kernel/sched/core.c > index c7c8ac4..f72663e 100644 > --- a/kernel/sched/core.c > +++ b/kernel/sched/core.c > @@ -6134,6 +6134,7 @@ sd_init(struct sched_domain_topology_level *tl, int cpu) > */ > > if (sd->flags & SD_SHARE_CPUCAPACITY) { > + sd->flags |= SD_PREFER_SIBLING; > sd->imbalance_pct = 110; > sd->smt_gain = 1178; /* ~15% */ > Reviewed-by: Preeti U. Murthy