Messages in this thread Patch in this message | | | From | Valentin Schneider <> | Subject | [PATCH 1/3] sched: Document arch_scale_*_capacity() | Date | Fri, 31 Jul 2020 20:20:14 +0100 |
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Rather that hide their purpose in some dark, damp corner of Documentation/, add some documentation to the default implementations.
Signed-off-by: Valentin Schneider <valentin.schneider@arm.com> --- include/linux/sched/topology.h | 10 ++++++++++ kernel/sched/sched.h | 10 ++++++++++ 2 files changed, 20 insertions(+)
diff --git a/include/linux/sched/topology.h b/include/linux/sched/topology.h index 764222d637b7..820511289857 100644 --- a/include/linux/sched/topology.h +++ b/include/linux/sched/topology.h @@ -217,6 +217,16 @@ static inline bool cpus_share_cache(int this_cpu, int that_cpu) #endif /* !CONFIG_SMP */ #ifndef arch_scale_cpu_capacity +/** + * arch_scale_cpu_capacity - get the capacity scale factor of a given CPU. + * @cpu: the CPU in question. + * + * Return: the CPU scale factor normalized against SCHED_CAPACITY_SCALE, i.e. + * + * max_perf(cpu) + * ----------------------------- * SCHED_CAPACITY_SCALE + * max(max_perf(c) : c \in CPUs) + */ static __always_inline unsigned long arch_scale_cpu_capacity(int cpu) { diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h index 296efd30d8c9..3fd283892761 100644 --- a/kernel/sched/sched.h +++ b/kernel/sched/sched.h @@ -2049,6 +2049,16 @@ void arch_scale_freq_tick(void) #endif #ifndef arch_scale_freq_capacity +/** + * arch_scale_freq_capacity - get the frequency scale factor of a given CPU. + * @cpu: the CPU in question. + * + * Return: the frequency scale factor normalized against SCHED_CAPACITY_SCALE, i.e. + * + * f_curr + * ------ * SCHED_CAPACITY_SCALE + * f_max + */ static __always_inline unsigned long arch_scale_freq_capacity(int cpu) { -- 2.27.0
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