Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932147AbbELCOo (ORCPT ); Mon, 11 May 2015 22:14:44 -0400 Received: from mail-ie0-f180.google.com ([209.85.223.180]:33381 "EHLO mail-ie0-f180.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752658AbbELCOe (ORCPT ); Mon, 11 May 2015 22:14:34 -0400 From: Michael Turquette To: peterz@infradead.org, mingo@kernel.org Cc: linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, preeti@linux.vnet.ibm.com, Morten.Rasmussen@arm.com, riel@redhat.com, efault@gmx.de, nicolas.pitre@linaro.org, daniel.lezcano@linaro.org, dietmar.eggemann@arm.com, vincent.guittot@linaro.org, amit.kucheria@linaro.org, juri.lelli@arm.com, rjw@rjwysocki.net, viresh.kumar@linaro.org, ashwin.chaugule@linaro.org, alex.shi@linaro.org, abelvesa@gmail.com, Michael Turquette Subject: [PATCH RFC v2 2/4] sched: sched feature for cpu frequency selection Date: Mon, 11 May 2015 19:13:13 -0700 Message-Id: <1431396795-32439-3-git-send-email-mturquette@linaro.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1431396795-32439-1-git-send-email-mturquette@linaro.org> References: <1431396795-32439-1-git-send-email-mturquette@linaro.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1503 Lines: 52 This patch introduces the SCHED_ENERGY_FREQ sched feature, which is implemented using jump labels when SCHED_DEBUG is defined. It is statically set to false when SCHED_DEBUG is not defined and thus disabled by default. Signed-off-by: Michael Turquette --- Changes in v2: none kernel/sched/fair.c | 5 +++++ kernel/sched/features.h | 6 ++++++ 2 files changed, 11 insertions(+) diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 46855d0..75aec8d 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -4207,6 +4207,11 @@ static inline void hrtick_update(struct rq *rq) } #endif +static inline bool sched_energy_freq(void) +{ + return sched_feat(SCHED_ENERGY_FREQ); +} + /* * The enqueue_task method is called before nr_running is * increased. Here we update the fair scheduling stats and diff --git a/kernel/sched/features.h b/kernel/sched/features.h index 91e33cd..77381cf 100644 --- a/kernel/sched/features.h +++ b/kernel/sched/features.h @@ -96,3 +96,9 @@ SCHED_FEAT(NUMA_FAVOUR_HIGHER, true) */ SCHED_FEAT(NUMA_RESIST_LOWER, false) #endif + +/* + * Scheduler-driven CPU frequency selection aimed to save energy based on + * load tracking + */ +SCHED_FEAT(SCHED_ENERGY_FREQ, false) -- 1.9.1 -- 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/