From patchwork Tue Oct 7 12:13:37 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vincent Guittot X-Patchwork-Id: 5045671 Return-Path: X-Original-To: patchwork-linux-arm@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 3A2DFC11AB for ; Tue, 7 Oct 2014 12:18:12 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 73D652011D for ; Tue, 7 Oct 2014 12:18:11 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 968D4201FE for ; Tue, 7 Oct 2014 12:18:10 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1XbTgi-0007yP-8b; Tue, 07 Oct 2014 12:16:20 +0000 Received: from mail-wg0-f41.google.com ([74.125.82.41]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1XbTg6-0007Pv-4h for linux-arm-kernel@lists.infradead.org; Tue, 07 Oct 2014 12:15:42 +0000 Received: by mail-wg0-f41.google.com with SMTP id b13so9069148wgh.12 for ; Tue, 07 Oct 2014 05:15:21 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=rZdd320zn6VOSf/3pkN3Q7zaRyGZKSA+vBt+EvzL+7M=; b=dehKY3RhfqrTGwHm5De8eh6mVSb6Fz+OZq/jqYEDYPgt+GgG0BSVlRvZOcK/DECDXc gqCZsZzx9wSdkFDVfzwiWXqGya5eBWYs+OpglEgLq0E4TQgtFMTqhTb56Tlr1nxlkjdg hfKBdyMhdGF3k+uxgQLgtkqwuyzOqjb7j455/8JcyyhAY2F1U47un3b0M3fLK9ei7sQ3 kg3DNPRD7TDIMgy8wP4bqwgMfSElTlfG0cDmN+frpGJ8MB4hpdA5Mvu4pw7FrcK0v1mO UFlipFRu+LKzu1Jvv+x5JoKWLm6ki0pAKqY1/oFVWKHLgq+jXzR4UkeMUY9vAuiktZ1j /TXQ== X-Gm-Message-State: ALoCoQm++7/houxNZBLH0zFUI3zBJTjqfF/g2Z6UOYEv8ueMiIjvBAiC0aki1NWDoGSsZB+qjzDt X-Received: by 10.194.58.229 with SMTP id u5mr2859413wjq.133.1412684121595; Tue, 07 Oct 2014 05:15:21 -0700 (PDT) Received: from lmenx30s.lme.st.com (LPuteaux-656-01-48-212.w82-127.abo.wanadoo.fr. [82.127.83.212]) by mx.google.com with ESMTPSA id v9sm20544897wjy.14.2014.10.07.05.15.19 for (version=TLSv1.1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Tue, 07 Oct 2014 05:15:20 -0700 (PDT) From: Vincent Guittot To: peterz@infradead.org, mingo@kernel.org, linux-kernel@vger.kernel.org, preeti@linux.vnet.ibm.com, Morten.Rasmussen@arm.com, kamalesh@linux.vnet.ibm.com, linux@arm.linux.org.uk, linux-arm-kernel@lists.infradead.org Subject: [PATCH v7 7/7] sched: add SD_PREFER_SIBLING for SMT level Date: Tue, 7 Oct 2014 14:13:37 +0200 Message-Id: <1412684017-16595-8-git-send-email-vincent.guittot@linaro.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1412684017-16595-1-git-send-email-vincent.guittot@linaro.org> References: <1412684017-16595-1-git-send-email-vincent.guittot@linaro.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20141007_051542_397153_D4C3A44E X-CRM114-Status: UNSURE ( 9.15 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -0.7 (/) Cc: nicolas.pitre@linaro.org, riel@redhat.com, daniel.lezcano@linaro.org, Vincent Guittot , efault@gmx.de, bsegall@google.com, linaro-kernel@lists.linaro.org, pjt@google.com, dietmar.eggemann@arm.com X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_NONE, T_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 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 Reviewed-by: Preeti U. Murthy --- kernel/sched/core.c | 1 + 1 file changed, 1 insertion(+) diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 37fb92c..731f2ad 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -6165,6 +6165,7 @@ 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% */