Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754811AbaGIDNZ (ORCPT ); Tue, 8 Jul 2014 23:13:25 -0400 Received: from mx1.redhat.com ([209.132.183.28]:30313 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751709AbaGIDNX (ORCPT ); Tue, 8 Jul 2014 23:13:23 -0400 Message-ID: <53BCB317.4050400@redhat.com> Date: Tue, 08 Jul 2014 23:12:23 -0400 From: Rik van Riel User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.5.0 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: preeti@linux.vnet.ibm.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 Subject: Re: [PATCH v3 07/12] sched: test the cpu's capacity in wake affine References: <1404144343-18720-1-git-send-email-vincent.guittot@linaro.org> <1404144343-18720-8-git-send-email-vincent.guittot@linaro.org> In-Reply-To: <1404144343-18720-8-git-send-email-vincent.guittot@linaro.org> X-Enigmail-Version: 1.6 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 06/30/2014 12:05 PM, Vincent Guittot wrote: > Currently the task always wakes affine on this_cpu if the latter is > idle. Before waking up the task on this_cpu, we check that this_cpu > capacity is not significantly reduced because of RT tasks or irq > activity. > > Use case where the number of irq and/or the time spent under irq is > important will take benefit of this because the task that is woken > up by irq or softirq will not use the same CPU than irq (and > softirq) but a idle one which share its cache. > > Signed-off-by: Vincent Guittot Acked-by: Rik van Riel - -- All rights reversed -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQEcBAEBAgAGBQJTvLMXAAoJEM553pKExN6DGwcIAIDInqWSTMPG1SpNPIgrDB4g YILWx6pFhv1ZSVEiJ05jxNpDKHeAKaEFR9NrSA/Psd+0p1zZ0pazioXyVhhr92PO 2C/xnIDsxNp7Qf+Yz1OvAHdoZiBM/uOI60JU+xL3bF/npjrw6DWe4WitikAookRR Yjwhtyj4KiVgXBYDWuES5HS5s61W+ol1F3as6KKMurfwU6JYXqJYMRZGQoymi144 5oV9enFgN3u6kXhXUMgC3vfzVW2xMr7SNDTvEDO0vqrvlIRsv07u63G0YppoMFbI Mht3ARLZKOwR6paiju1IkBdy/4nZeAuO461hDKwb/bB5q3JdeUtXw89xbelJD1Y= =H6O5 -----END PGP SIGNATURE----- -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/