40 lines
1.2 KiB
Diff
40 lines
1.2 KiB
Diff
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From ca8c9368b6f28ef625716b03aa930acfb8afe158 Mon Sep 17 00:00:00 2001
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From: Christian Loehle <christian.loehle@arm.com>
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Date: Thu, 5 Sep 2024 10:26:40 +0100
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Subject: TEST: cpufreq/schedutil: Linear iowait boost step
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In preparation for capping iowait boost make the steps linear as
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opposed to doubling.
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Signed-off-by: Christian Loehle <christian.loehle@arm.com>
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---
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kernel/sched/cpufreq_schedutil.c | 9 ++++-----
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1 file changed, 4 insertions(+), 5 deletions(-)
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--- a/kernel/sched/cpufreq_schedutil.c
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+++ b/kernel/sched/cpufreq_schedutil.c
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@@ -267,7 +267,8 @@ static void sugov_iowait_boost(struct su
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/* Double the boost at each request */
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if (sg_cpu->iowait_boost) {
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sg_cpu->iowait_boost =
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- min_t(unsigned int, sg_cpu->iowait_boost << 1, SCHED_CAPACITY_SCALE);
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+ min_t(unsigned int,
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+ sg_cpu->iowait_boost + IOWAIT_BOOST_MIN, SCHED_CAPACITY_SCALE);
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return;
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}
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@@ -308,11 +309,9 @@ static unsigned long sugov_iowait_apply(
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/*
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* No boost pending; reduce the boost value.
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*/
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- sg_cpu->iowait_boost >>= 1;
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- if (sg_cpu->iowait_boost < IOWAIT_BOOST_MIN) {
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- sg_cpu->iowait_boost = 0;
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+ sg_cpu->iowait_boost -= IOWAIT_BOOST_MIN;
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+ if (!sg_cpu->iowait_boost)
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return 0;
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- }
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}
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sg_cpu->iowait_boost_pending = false;
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