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| author | Valentin Schneider <valentin.schneider@arm.com> | 2020-07-31 22:20:14 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2020-08-01 10:19:43 +0300 |
| commit | f4470cdf108f00533e8079b19434e6cb48c17fa3 (patch) | |
| tree | 3c290a2f505a3d6a3fc443cd8f12048c43695f96 /include/linux/sched/topology.h | |
| parent | fcd7c9c3c35aed58aba2eea6d375f0e5b03bd6d6 (diff) | |
| download | linux-f4470cdf108f00533e8079b19434e6cb48c17fa3.tar.xz | |
sched: Document arch_scale_*_capacity()
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>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20200731192016.7484-2-valentin.schneider@arm.com
Diffstat (limited to 'include/linux/sched/topology.h')
| -rw-r--r-- | include/linux/sched/topology.h | 10 |
1 files changed, 10 insertions, 0 deletions
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) { |