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[PATCH 6/6] arm64: wire cpu-invariant accounting support up to the task scheduler

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  [PATCH 6/6] arm64: wire cpu-invariant accounting support up to the task scheduler Dietmar Eggemann <dietmar.eggemann@arm.com> - 2017-06-08 10:00 +0200
    Re: [PATCH 6/6] arm64: wire cpu-invariant accounting support up to  the task scheduler Catalin Marinas <catalin.marinas@arm.com> - 2017-06-12 15:10 +0200
    Re: [PATCH 6/6] arm64: wire cpu-invariant accounting support up to  the task scheduler Vincent Guittot <vincent.guittot@linaro.org> - 2017-06-12 16:40 +0200

#1660887 — [PATCH 6/6] arm64: wire cpu-invariant accounting support up to the task scheduler

Commit 8cd5601c5060 ("sched/fair: Convert arch_scale_cpu_capacity() from
weak function to #define") changed the wiring which now has to be done
by associating arch_scale_cpu_capacity with the actual implementation
provided by the architecture.

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

Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Juri Lelli <juri.lelli@arm.com>
Signed-off-by: Dietmar Eggemann <dietmar.eggemann@arm.com>
---
 arch/arm64/include/asm/topology.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/arm64/include/asm/topology.h b/arch/arm64/include/asm/topology.h
index 44598a86ec4a..e313eeb10756 100644
--- a/arch/arm64/include/asm/topology.h
+++ b/arch/arm64/include/asm/topology.h
@@ -37,6 +37,9 @@ int pcibus_to_node(struct pci_bus *bus);
 /* Replace task scheduler's default frequency-invariant accounting */
 #define arch_scale_freq_capacity topology_get_freq_scale
 
+/* Replace task scheduler's default cpu-invariant accounting */
+#define arch_scale_cpu_capacity topology_get_cpu_scale
+
 #include <asm-generic/topology.h>
 
 #endif /* _ASM_ARM_TOPOLOGY_H */
-- 
2.11.0

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#1663490 — Re: [PATCH 6/6] arm64: wire cpu-invariant accounting support up to the task scheduler

On Thu, Jun 08, 2017 at 08:55:13AM +0100, Dietmar Eggemann wrote:
> Commit 8cd5601c5060 ("sched/fair: Convert arch_scale_cpu_capacity() from
> weak function to #define") changed the wiring which now has to be done
> by associating arch_scale_cpu_capacity with the actual implementation
> provided by the architecture.
> 
> Define arch_scale_cpu_capacity to use the arch_topology "driver"
> function topology_get_cpu_scale() for the task scheduler's cpu-invariant
> accounting instead of the default arch_scale_cpu_capacity() in
> kernel/sched/sched.h.
> 
> Cc: Catalin Marinas <catalin.marinas@arm.com>
> Cc: Will Deacon <will.deacon@arm.com>
> Cc: Juri Lelli <juri.lelli@arm.com>
> Signed-off-by: Dietmar Eggemann <dietmar.eggemann@arm.com>
> ---
>  arch/arm64/include/asm/topology.h | 3 +++
>  1 file changed, 3 insertions(+)

Acked-by: Catalin Marinas <catalin.marinas@arm.com>

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#1663558 — Re: [PATCH 6/6] arm64: wire cpu-invariant accounting support up to the task scheduler

On 8 June 2017 at 09:55, Dietmar Eggemann <dietmar.eggemann@arm.com> wrote:
> Commit 8cd5601c5060 ("sched/fair: Convert arch_scale_cpu_capacity() from
> weak function to #define") changed the wiring which now has to be done
> by associating arch_scale_cpu_capacity with the actual implementation
> provided by the architecture.
>
> Define arch_scale_cpu_capacity to use the arch_topology "driver"
> function topology_get_cpu_scale() for the task scheduler's cpu-invariant
> accounting instead of the default arch_scale_cpu_capacity() in
> kernel/sched/sched.h.
>
> Cc: Catalin Marinas <catalin.marinas@arm.com>
> Cc: Will Deacon <will.deacon@arm.com>
> Cc: Juri Lelli <juri.lelli@arm.com>
> Signed-off-by: Dietmar Eggemann <dietmar.eggemann@arm.com>

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

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