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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2024-01-18 11:57:33 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2024-01-18 11:57:33 -0800 |
| commit | b0d326da462e20285236e11e4cbc32085de9f363 (patch) | |
| tree | 0b2451a1e2a706eb512d6c681b1d8e9c41aeb971 /kernel | |
| parent | 8c94ccc7cd691472461448f98e2372c75849406c (diff) | |
| parent | e37617c8e53a1f7fcba6d5e1041f4fd8a2425c27 (diff) | |
Merge tag 'sched-urgent-2024-01-18' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scheduler fix from Ingo Molnar:
"Fix a cpufreq related performance regression on certain systems, where
the CPU would remain at the lowest frequency, degrading performance
substantially"
* tag 'sched-urgent-2024-01-18' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
sched/fair: Fix frequency selection for non-invariant case
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/sched/cpufreq_schedutil.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/kernel/sched/cpufreq_schedutil.c b/kernel/sched/cpufreq_schedutil.c index 95c3c097083e..eece6244f9d2 100644 --- a/kernel/sched/cpufreq_schedutil.c +++ b/kernel/sched/cpufreq_schedutil.c @@ -133,7 +133,11 @@ unsigned long get_capacity_ref_freq(struct cpufreq_policy *policy) if (arch_scale_freq_invariant()) return policy->cpuinfo.max_freq; - return policy->cur; + /* + * Apply a 25% margin so that we select a higher frequency than + * the current one before the CPU is fully busy: + */ + return policy->cur + (policy->cur >> 2); } /** |