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[v4,07/10] arm: wire frequency-invariant accounting support up to the task scheduler

Message ID 20170825143206.30467-8-dietmar.eggemann@arm.com
State Superseded
Headers show
Series arm, arm64, cpufreq: frequency- and cpu-invariant accounting support for task scheduler | expand

Commit Message

Dietmar Eggemann Aug. 25, 2017, 2:32 p.m. UTC 
Commit dfbca41f3479 ("sched: Optimize freq invariant accounting")
changed the wiring which now has to be done by associating
arch_scale_freq_capacity with the actual implementation provided
by the architecture.

Define arch_scale_freq_capacity to use the arch_topology "driver"
function topology_get_freq_scale() for the task scheduler's
frequency-invariant accounting instead of the default
arch_scale_freq_capacity() in kernel/sched/sched.h.

Cc: Russell King <linux@arm.linux.org.uk>
Cc: Juri Lelli <juri.lelli@arm.com>
Signed-off-by: Dietmar Eggemann <dietmar.eggemann@arm.com>

Acked-by: Vincent Guittot <vincent.guittot@linaro.org>

Acked-by: Russell King <rmk+kernel@armlinux.org.uk>

Tested-by: Juri Lelli <juri.lelli@arm.com>

Reviewed-by: Juri Lelli <juri.lelli@arm.com>

---
 arch/arm/include/asm/topology.h | 5 +++++
 1 file changed, 5 insertions(+)

-- 
2.11.0
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Patch

diff --git a/arch/arm/include/asm/topology.h b/arch/arm/include/asm/topology.h
index 370f7a732900..a56a9e24f4c0 100644
--- a/arch/arm/include/asm/topology.h
+++ b/arch/arm/include/asm/topology.h
@@ -24,6 +24,11 @@  void init_cpu_topology(void);
 void store_cpu_topology(unsigned int cpuid);
 const struct cpumask *cpu_coregroup_mask(int cpu);
 
+#include <linux/arch_topology.h>
+
+/* Replace task scheduler's default frequency-invariant accounting */
+#define arch_scale_freq_capacity topology_get_freq_scale
+
 #else
 
 static inline void init_cpu_topology(void) { }