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sched: fair: Reduce runtime allocated for tasks constrained by CFS bandwidth

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A bunch of kernels for desktop Linux have been reducing this value to improve interactivity. From Zen[1] to CachyOS[2]. There have been attempts to reduce it on Android as well.

Experiment with reducing the CFS bandwidth slice to 4 msec, 1 less from the default. This is something I honestly don't want userspace to touch so keep it out from sysfs and modify it from the kernel directly instead. I honestly think that the 'interactivity' benefits (if it does hold water) of this change should be reflected on all performance modes on FreshROMs.

Test for performance and battery life.

[1]: https://github.com/zen-kernel/zen-kernel/commit/7de2596b35ac1db
[2]: https://github.com/CachyOS/linux/blob/base-5.18/kernel/sched/fair.c

Signed-off-by: John Vincent <git@tenseventyseven.cf>
This commit is contained in:
John Vincent 2022-07-03 18:47:18 +08:00 committed by Ksawlii
parent 9341ba576e
commit fff787f527
1 changed files with 1 additions and 1 deletions
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kernel/sched/fair.c
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@ -132,7 +132,7 @@ int __weak arch_asym_cpu_priority(int cpu)
*
* (default: 5 msec, units: microseconds)
*/
unsigned int sysctl_sched_cfs_bandwidth_slice = 5000UL;
unsigned int sysctl_sched_cfs_bandwidth_slice = 4000UL;
#endif
static inline void update_load_add(struct load_weight *lw, unsigned long inc)