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From: Juri Lelli <juri.lelli@arm.com>
To: linux-kernel@vger.kernel.org
Cc: linux-pm@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	devicetree@vger.kernel.org, peterz@infradead.org,
	vincent.guittot@linaro.org, robh+dt@kernel.org,
	mark.rutland@arm.com, linux@arm.linux.org.uk,
	sudeep.holla@arm.com, lorenzo.pieralisi@arm.com,
	catalin.marinas@arm.com, will.deacon@arm.com,
	morten.rasmussen@arm.com, dietmar.eggemann@arm.com,
	juri.lelli@arm.com
Subject: [RFC PATCH 1/8] ARM: initialize cpu_scale to its default
Date: Mon, 23 Nov 2015 14:28:34 +0000	[thread overview]
Message-ID: <1448288921-30307-2-git-send-email-juri.lelli@arm.com> (raw)
In-Reply-To: <1448288921-30307-1-git-send-email-juri.lelli@arm.com>

Instead of looping through all cpus calling set_capacity_scale, we can
initialise cpu_scale per-cpu variables to SCHED_CAPACITY_SCALE with their
definition.

Cc: Russell King <linux@arm.linux.org.uk>
Signed-off-by: Juri Lelli <juri.lelli@arm.com>
---
 arch/arm/kernel/topology.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/arch/arm/kernel/topology.c b/arch/arm/kernel/topology.c
index 08b7847..ec279d1 100644
--- a/arch/arm/kernel/topology.c
+++ b/arch/arm/kernel/topology.c
@@ -40,7 +40,7 @@
  * to run the rebalance_domains for all idle cores and the cpu_capacity can be
  * updated during this sequence.
  */
-static DEFINE_PER_CPU(unsigned long, cpu_scale);
+static DEFINE_PER_CPU(unsigned long, cpu_scale) = SCHED_CAPACITY_SCALE;
 
 unsigned long arch_scale_cpu_capacity(struct sched_domain *sd, int cpu)
 {
@@ -306,8 +306,6 @@ void __init init_cpu_topology(void)
 		cpu_topo->socket_id = -1;
 		cpumask_clear(&cpu_topo->core_sibling);
 		cpumask_clear(&cpu_topo->thread_sibling);
-
-		set_capacity_scale(cpu, SCHED_CAPACITY_SCALE);
 	}
 	smp_wmb();
 
-- 
2.2.2

  reply	other threads:[~2015-11-23 14:28 UTC|newest]

Thread overview: 57+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-11-23 14:28 [RFC PATCH 0/8] CPUs capacity information for heterogeneous systems Juri Lelli
2015-11-23 14:28 ` Juri Lelli [this message]
2015-11-30 11:13   ` [RFC PATCH 1/8] ARM: initialize cpu_scale to its default Vincent Guittot
2015-11-23 14:28 ` [RFC PATCH 2/8] Documentation: arm: define DT cpu capacity bindings Juri Lelli
2015-11-24  2:06   ` Rob Herring
2015-11-24 10:54     ` Juri Lelli
2015-11-30  9:59       ` Vincent Guittot
2015-12-01 11:20         ` Juri Lelli
2015-12-10 14:14           ` Dietmar Eggemann
2015-12-11 10:09             ` Juri Lelli
2015-12-10 15:30     ` Mark Brown
2015-12-10 17:58       ` Juri Lelli
2015-12-11 17:49         ` Mark Brown
     [not found]           ` <20151211174940.GQ5727-GFdadSzt00ze9xe1eoZjHA@public.gmane.org>
2015-12-14 12:36             ` Juri Lelli
2015-12-14 16:59               ` Mark Brown
2015-12-15 12:22                 ` Juri Lelli
2015-12-15 13:39                   ` Mark Brown
2015-12-15 14:01                     ` Mark Rutland
2015-12-15 14:24                       ` Juri Lelli
2015-12-15 14:50                         ` Mark Rutland
2015-12-15 15:36                           ` Juri Lelli
2015-12-15 15:08                       ` Mark Brown
     [not found]                         ` <20151215150813.GZ5727-GFdadSzt00ze9xe1eoZjHA@public.gmane.org>
2015-12-15 15:32                           ` Mark Rutland
2015-12-15 15:46                             ` Juri Lelli
2015-12-15 15:57                               ` Mark Rutland
2015-12-15 16:23                                 ` Catalin Marinas
2015-12-15 16:41                                   ` Mark Rutland
2015-12-15 16:59                                     ` Vincent Guittot
     [not found]                                       ` <CAKfTPtAuosPcL8bbQ27Y-vUE1h4QRY8hGESnm4YrxqRAQ3K=5g-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-12-15 17:15                                         ` Mark Rutland
2015-12-15 17:47                                           ` Vincent Guittot
     [not found]                                             ` <CAKfTPtBzWcNHx+Fi7hUabNpPsd1thFAkPnLcpsnqbQp6Qq24cQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-12-15 18:39                                               ` Mark Rutland
2015-12-15 17:17                             ` Mark Brown
     [not found]                               ` <20151215171713.GA5727-GFdadSzt00ze9xe1eoZjHA@public.gmane.org>
2015-12-15 17:28                                 ` Mark Rutland
2015-12-15 17:45                                   ` Mark Brown
2015-12-15 18:10                                     ` Mark Rutland
2015-12-15 18:45                                       ` Mark Brown
2015-12-17  9:07                                     ` Juri Lelli
2015-12-15 13:55                   ` Vincent Guittot
2015-11-23 14:28 ` [RFC PATCH 3/8] arm: parse cpu capacity from DT Juri Lelli
2015-12-10 14:14   ` Dietmar Eggemann
     [not found]     ` <566988DD.9080005-5wv7dgnIgG8@public.gmane.org>
2015-12-11 10:12       ` Juri Lelli
2015-11-23 14:28 ` [RFC PATCH 4/8] arm, dts: add TC2 cpu capacity information Juri Lelli
2015-11-23 14:28 ` [RFC PATCH 5/8] arm64: parse cpu capacity from DT Juri Lelli
2015-12-10 14:15   ` Dietmar Eggemann
2015-12-11 10:07     ` Juri Lelli
2015-11-23 14:28 ` [RFC PATCH 6/8] arm64, dts: add Juno cpu capacity information Juri Lelli
2015-11-23 14:28 ` [RFC PATCH 7/8] arm: add sysfs cpu_capacity attribute Juri Lelli
2015-11-23 14:28 ` [RFC PATCH 8/8] arm64: " Juri Lelli
2015-12-10 14:15   ` Dietmar Eggemann
2015-12-10 15:59     ` Mark Brown
2015-12-10 18:01       ` Juri Lelli
2015-12-11 17:54         ` Mark Brown
2015-12-07 12:02 ` [RFC PATCH 0/8] CPUs capacity information for heterogeneous systems Juri Lelli
2015-12-07 12:11   ` Russell King - ARM Linux
2015-12-07 12:36     ` Juri Lelli
2015-12-07 13:18       ` Russell King - ARM Linux
     [not found]         ` <20151207131843.GP8644-l+eeeJia6m9vn6HldHNs0ANdhmdF6hFW@public.gmane.org>
2015-12-07 15:41           ` Juri Lelli

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