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cpufreq: schedutil: Reduce frequencies slower

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The schedutil governor reduces frequencies too fast in some
situations which cases undesirable performance drops to
appear.

To address that issue, make schedutil reduce the frequency slower by
setting it to the average of the value chosen during the previous
iteration of governor computations and the new one coming from its
frequency selection formula.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=194963
Reported-by: John <john.ettedgui@gmail.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Cykeek <Cykeek@proton.me>
Signed-off-by: negrroo <mohammedaelnaggar1@gmail.com>
Signed-off-by: priiii1808 <priyanshusinghal0818@gmail.com>
This commit is contained in:
Rafael J. Wysocki 2022-12-31 14:08:56 +05:30 committed by Ksawlii
parent 04ccb84743
commit bc903594c9
1 changed files with 3 additions and 0 deletions
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3
kernel/sched/cpufreq_schedutil.c
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@ -110,6 +110,9 @@ static bool sugov_update_next_freq(struct sugov_policy *sg_policy, u64 time,
sg_policy->need_freq_update = cpufreq_driver_test_flags(CPUFREQ_NEED_UPDATE_LIMITS);
}
if (sg_policy->next_freq > next_freq)
next_freq = (sg_policy->next_freq + next_freq) >> 1;
sg_policy->next_freq = next_freq;
sg_policy->last_freq_update_time = time;