Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759236Ab3DYR0Y (ORCPT ); Thu, 25 Apr 2013 13:26:24 -0400 Received: from mail-wg0-f48.google.com ([74.125.82.48]:61779 "EHLO mail-wg0-f48.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759019Ab3DYRZP (ORCPT ); Thu, 25 Apr 2013 13:25:15 -0400 From: Vincent Guittot To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linaro-kernel@lists.linaro.org, peterz@infradead.org, mingo@kernel.org, linux@arm.linux.org.uk, pjt@google.com, santosh.shilimkar@ti.com, Morten.Rasmussen@arm.com, chander.kashyap@linaro.org, cmetcalf@tilera.com, tony.luck@intel.com, alex.shi@intel.com, preeti@linux.vnet.ibm.com Cc: paulmck@linux.vnet.ibm.com, tglx@linutronix.de, len.brown@intel.com, arjan@linux.intel.com, amit.kucheria@linaro.org, corbet@lwn.net, l.majewski@samsung.com, Vincent Guittot Subject: [PATCH 12/14] sched: create a new field with available capacity Date: Thu, 25 Apr 2013 19:23:28 +0200 Message-Id: <1366910611-20048-13-git-send-email-vincent.guittot@linaro.org> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1366910611-20048-1-git-send-email-vincent.guittot@linaro.org> References: <1366910611-20048-1-git-send-email-vincent.guittot@linaro.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3262 Lines: 111 This new field power_available reflects the available capacity of a CPU unlike the cpu_power which reflects the current capacity. Signed-off-by: Vincent Guittot --- include/linux/sched.h | 2 +- kernel/sched/fair.c | 18 +++++++++++++++--- kernel/sched/sched.h | 1 + 3 files changed, 17 insertions(+), 4 deletions(-) diff --git a/include/linux/sched.h b/include/linux/sched.h index a82cdeb..03a5143 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -824,7 +824,7 @@ struct sched_group_power { * CPU power of this group, SCHED_LOAD_SCALE being max power for a * single CPU. */ - unsigned int power, power_orig; + unsigned int power, power_orig, power_available; unsigned long next_update; /* * Number of busy cpus in this group. diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 6f63fb9..756b1e3 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -179,6 +179,11 @@ static unsigned long power_of(int cpu) return cpu_rq(cpu)->cpu_power; } +static unsigned long available_of(int cpu) +{ + return cpu_rq(cpu)->cpu_available; +} + /* * Save the id of the optimal CPU that should be used to pack small tasks * The value -1 is used when no buddy has been found @@ -4588,6 +4593,9 @@ static void update_cpu_power(struct sched_domain *sd, int cpu) if (!power) power = 1; + cpu_rq(cpu)->cpu_available = power; + sdg->sgp->power_available = power; + cpu_rq(cpu)->cpu_power = power; sdg->sgp->power = power; } @@ -4596,7 +4604,7 @@ void update_group_power(struct sched_domain *sd, int cpu) { struct sched_domain *child = sd->child; struct sched_group *group, *sdg = sd->groups; - unsigned long power; + unsigned long power, available; unsigned long interval; interval = msecs_to_jiffies(sd->balance_interval); @@ -4608,7 +4616,7 @@ void update_group_power(struct sched_domain *sd, int cpu) return; } - power = 0; + power = available = 0; if (child->flags & SD_OVERLAP) { /* @@ -4618,6 +4626,8 @@ void update_group_power(struct sched_domain *sd, int cpu) for_each_cpu(cpu, sched_group_cpus(sdg)) power += power_of(cpu); + available += available_of(cpu); + } else { /* * !SD_OVERLAP domains can assume that child groups @@ -4627,11 +4637,13 @@ void update_group_power(struct sched_domain *sd, int cpu) group = child->groups; do { power += group->sgp->power; + available += group->sgp->power_available; group = group->next; } while (group != child->groups); } - sdg->sgp->power_orig = sdg->sgp->power = power; + sdg->sgp->power_orig = sdg->sgp->power_available = available; + sdg->sgp->power = power; } /* diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h index 96b164d..2b6eaf9 100644 --- a/kernel/sched/sched.h +++ b/kernel/sched/sched.h @@ -413,6 +413,7 @@ struct rq { struct sched_domain *sd; unsigned long cpu_power; + unsigned long cpu_available; unsigned char idle_balance; /* For active balancing */ -- 1.7.9.5 -- 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/