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| author | Ionela Voinescu <ionela.voinescu@arm.com> | 2017-08-30 16:43:11 +0100 |
|---|---|---|
| committer | Georg Veichtlbauer <georg@vware.at> | 2023-07-26 21:01:08 +0200 |
| commit | 40bf84fc323affcca8b3d446d9cecef706a7a36b (patch) | |
| tree | 0fb16b0b67c37c1784ce45c80127f426810aea6d | |
| parent | d416e291213e0cfd6c345872d63efabe634bb33a (diff) | |
sched: add arch_scale_min_freq_capacity to track minimum capacity caps
If the minimum capacity of a group is capped by userspace or internal
dependencies which are not otherwise visible to the scheduler, we need
a way to see these and integrate this information into the energy
calculations and task placement decisions we make.
Add arch_scale_min_freq_capacity to determine the lowest capacity which
a specific cpu can provide under the current set of known constraints.
Change-Id: Ied4a1dc0982bbf42cb5ea2f27201d4363db59705
Signed-off-by: Chris Redpath <chris.redpath@arm.com>
Signed-off-by: Ionela Voinescu <ionela.voinescu@arm.com>
| -rw-r--r-- | kernel/sched/sched.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h index 3d90fe2c2d6b..9473d4742349 100644 --- a/kernel/sched/sched.h +++ b/kernel/sched/sched.h @@ -2365,6 +2365,18 @@ unsigned long arch_scale_max_freq_capacity(struct sched_domain *sd, int cpu) } #endif +#ifndef arch_scale_min_freq_capacity +static __always_inline +unsigned long arch_scale_min_freq_capacity(struct sched_domain *sd, int cpu) +{ + /* + * Multiplied with any capacity value, this scale factor will return + * 0, which represents an un-capped state + */ + return 0; +} +#endif + #ifndef arch_scale_cpu_capacity static __always_inline unsigned long arch_scale_cpu_capacity(struct sched_domain *sd, int cpu) |