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ANDROID: Re-use SUGOV_RT_MAX_FREQ to control uclamp rt behavior

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By default uclamp RT tasks will use the max frequency, which is not the
desired default behavior on mobile devices.

Re-use the SUGOV_RT_MAX_FREQ sched_feat to control the default behavior.

When SUGOV_RT_MAX_FREQ is NOT selected, the uclamp_min value of the RT
tasks will be 0.

Bug: 120440300
Signed-off-by: Qais Yousef <qais.yousef@arm.com>
Change-Id: I3d36f1ebed6ef35a6299af32bbf4462d0353e783
Git-commit: f89ff1404286486643a1ae80f1f22946cdb8d0ee
Git-repo: https://android.googlesource.com/kernel/common/
Signed-off-by: Satya Durga Srinivasu Prabhala <satyap@codeaurora.org>
This commit is contained in:
Qais Yousef 2019-12-19 11:24:41 +00:00 • committed by Satya Durga Srinivasu Prabhala
commit 09c8865bfc
1 changed files with 10 additions and 2 deletions
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12
kernel/sched/core.c
View file

@ -1216,8 +1216,12 @@ static void __setscheduler_uclamp(struct task_struct *p,
continue;
/* By default, RT tasks always get 100% boost */
if (unlikely(rt_task(p) && clamp_id == UCLAMP_MIN))
if (sched_feat(SUGOV_RT_MAX_FREQ) &&
unlikely(rt_task(p) &&
clamp_id == UCLAMP_MIN)) {
clamp_value = uclamp_none(UCLAMP_MAX);
}
uclamp_se_set(uc_se, clamp_value, false);
}
@ -1250,8 +1254,12 @@ static void uclamp_fork(struct task_struct *p)
unsigned int clamp_value = uclamp_none(clamp_id);
/* By default, RT tasks always get 100% boost */
if (unlikely(rt_task(p) && clamp_id == UCLAMP_MIN))
if (sched_feat(SUGOV_RT_MAX_FREQ) &&
unlikely(rt_task(p) &&
clamp_id == UCLAMP_MIN)) {
clamp_value = uclamp_none(UCLAMP_MAX);
}
uclamp_se_set(&p->uclamp_req[clamp_id], clamp_value, false);
}