path: root/drivers
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authorDietmar Eggemann <dietmar.eggemann@arm.com>2021-11-18 17:42:40 +0100
committerPeter Zijlstra <peterz@infradead.org>2021-12-11 09:10:00 +0100
commit82762d2af31a60081162890983a83499c9c7dd74 (patch)
tree1aeffa58b23b7ab2489ba37124a535d30a0cf030 /drivers
parentsched/fair: Cleanup task_util and capacity type (diff)
sched/fair: Replace CFS internal cpu_util() with cpu_util_cfs()
cpu_util_cfs() was created by commit d4edd662ac16 ("sched/cpufreq: Use the DEADLINE utilization signal") to enable the access to CPU utilization from the Schedutil CPUfreq governor. Commit a07630b8b2c1 ("sched/cpufreq/schedutil: Use util_est for OPP selection") added util_est support later. The only thing cpu_util() is doing on top of what cpu_util_cfs() already does is to clamp the return value to the [0..capacity_orig] capacity range of the CPU. Integrating this into cpu_util_cfs() is not harming the existing users (Schedutil and CPUfreq cooling (latter via sched_cpu_util() wrapper)). For straightforwardness, prefer to keep using `int cpu` as the function parameter over using `struct rq *rq` which might avoid some calls to cpu_rq(cpu) -> per_cpu(runqueues, cpu) -> RELOC_HIDE(). Update cfs_util()'s documentation and reuse it for cpu_util_cfs(). Remove cpu_util(). Signed-off-by: Dietmar Eggemann <dietmar.eggemann@arm.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Vincent Guittot <vincent.guittot@linaro.org> Link: https://lore.kernel.org/r/20211118164240.623551-1-dietmar.eggemann@arm.com
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