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authorNicolas Pitre <nicolas.pitre@linaro.org>2014-05-26 18:19:39 -0400
committerIngo Molnar <mingo@kernel.org>2014-06-05 11:52:30 +0200
commitca8ce3d0b144c318a5a9ce99649053e9029061ea (patch)
treec16f890097b570d2703c1295831470c17937ee10 /include/linux/sched.h
parentced549fa5fc1fdaf7fac93894dc673092eb3dc20 (diff)
sched: Final power vs. capacity cleanups
It is better not to think about compute capacity as being equivalent to "CPU power". The upcoming "power aware" scheduler work may create confusion with the notion of energy consumption if "power" is used too liberally. This contains the architecture visible changes. Incidentally, only ARM takes advantage of the available pow^H^H^Hcapacity scaling hooks and therefore those changes outside kernel/sched/ are confined to one ARM specific file. The default arch_scale_smt_power() hook is not overridden by anyone. Replacements are as follows: arch_scale_freq_power --> arch_scale_freq_capacity arch_scale_smt_power --> arch_scale_smt_capacity SCHED_POWER_SCALE --> SCHED_CAPACITY_SCALE SCHED_POWER_SHIFT --> SCHED_CAPACITY_SHIFT The local usage of "power" in arch/arm/kernel/topology.c is also changed to "capacity" as appropriate. Signed-off-by: Nicolas Pitre <nico@linaro.org> Signed-off-by: Peter Zijlstra <peterz@infradead.org> Cc: Vincent Guittot <vincent.guittot@linaro.org> Cc: Daniel Lezcano <daniel.lezcano@linaro.org> Cc: Morten Rasmussen <morten.rasmussen@arm.com> Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net> Cc: linaro-kernel@lists.linaro.org Cc: Arnd Bergmann <arnd@arndb.de> Cc: Dietmar Eggemann <dietmar.eggemann@arm.com> Cc: Grant Likely <grant.likely@linaro.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mark Brown <broonie@linaro.org> Cc: Rob Herring <robh+dt@kernel.org> Cc: Russell King <linux@arm.linux.org.uk> Cc: Sudeep KarkadaNagesha <sudeep.karkadanagesha@arm.com> Cc: Vincent Guittot <vincent.guittot@linaro.org> Cc: devicetree@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org Link: http://lkml.kernel.org/n/tip-48zba9qbznvglwelgq2cfygh@git.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'include/linux/sched.h')
-rw-r--r--include/linux/sched.h6
1 files changed, 3 insertions, 3 deletions
diff --git a/include/linux/sched.h b/include/linux/sched.h
index a96f03598c61..322110affe63 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -854,10 +854,10 @@ enum cpu_idle_type {
};
/*
- * Increase resolution of cpu_power calculations
+ * Increase resolution of cpu_capacity calculations
*/
-#define SCHED_POWER_SHIFT 10
-#define SCHED_POWER_SCALE (1L << SCHED_POWER_SHIFT)
+#define SCHED_CAPACITY_SHIFT 10
+#define SCHED_CAPACITY_SCALE (1L << SCHED_CAPACITY_SHIFT)
/*
* sched-domains (multiprocessor balancing) declarations: