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
next prev parent 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
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1448288921-30307-2-git-send-email-juri.lelli@arm.com \
--to=juri.lelli@arm.com \
--cc=catalin.marinas@arm.com \
--cc=devicetree@vger.kernel.org \
--cc=dietmar.eggemann@arm.com \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-pm@vger.kernel.org \
--cc=linux@arm.linux.org.uk \
--cc=lorenzo.pieralisi@arm.com \
--cc=mark.rutland@arm.com \
--cc=morten.rasmussen@arm.com \
--cc=peterz@infradead.org \
--cc=robh+dt@kernel.org \
--cc=sudeep.holla@arm.com \
--cc=vincent.guittot@linaro.org \
--cc=will.deacon@arm.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).