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* [PATCH] sched: Take thermal pressure into account when determine rt fits capacity
@ 2022-04-07  5:19 Xuewen Yan
  2022-04-11  8:21 ` Dietmar Eggemann
  2022-04-20 13:51 ` Qais Yousef
  0 siblings, 2 replies; 43+ messages in thread
From: Xuewen Yan @ 2022-04-07  5:19 UTC (permalink / raw)
  To: dietmar.eggemann, lukasz.luba
  Cc: rafael, viresh.kumar, mingo, peterz, vincent.guittot, rostedt,
	linux-kernel, di.shen, xuewen.yan94

There are cases when the cpu max capacity might be reduced due to thermal.
Take into the thermal pressure into account when judge whether the rt task
fits the cpu. And when schedutil govnor get cpu util, the thermal pressure
also should be considered.

Signed-off-by: Xuewen Yan <xuewen.yan@unisoc.com>
---
 kernel/sched/cpufreq_schedutil.c | 1 +
 kernel/sched/rt.c                | 1 +
 2 files changed, 2 insertions(+)

diff --git a/kernel/sched/cpufreq_schedutil.c b/kernel/sched/cpufreq_schedutil.c
index 3dbf351d12d5..285ad51caf0f 100644
--- a/kernel/sched/cpufreq_schedutil.c
+++ b/kernel/sched/cpufreq_schedutil.c
@@ -159,6 +159,7 @@ static void sugov_get_util(struct sugov_cpu *sg_cpu)
 	struct rq *rq = cpu_rq(sg_cpu->cpu);
 	unsigned long max = arch_scale_cpu_capacity(sg_cpu->cpu);
 
+	max -= arch_scale_thermal_pressure(sg_cpu->cpu);
 	sg_cpu->max = max;
 	sg_cpu->bw_dl = cpu_bw_dl(rq);
 	sg_cpu->util = effective_cpu_util(sg_cpu->cpu, cpu_util_cfs(sg_cpu->cpu), max,
diff --git a/kernel/sched/rt.c b/kernel/sched/rt.c
index a32c46889af8..d9982ebd4821 100644
--- a/kernel/sched/rt.c
+++ b/kernel/sched/rt.c
@@ -466,6 +466,7 @@ static inline bool rt_task_fits_capacity(struct task_struct *p, int cpu)
 	max_cap = uclamp_eff_value(p, UCLAMP_MAX);
 
 	cpu_cap = capacity_orig_of(cpu);
+	cpu_cap -= arch_scale_thermal_pressure(cpu);
 
 	return cpu_cap >= min(min_cap, max_cap);
 }
-- 
2.25.1


^ permalink raw reply related	[flat|nested] 43+ messages in thread

end of thread, other threads:[~2022-06-15 13:54 UTC | newest]

Thread overview: 43+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2022-04-07  5:19 [PATCH] sched: Take thermal pressure into account when determine rt fits capacity Xuewen Yan
2022-04-11  8:21 ` Dietmar Eggemann
2022-04-11  8:52   ` Xuewen Yan
2022-04-11 14:07     ` Dietmar Eggemann
2022-04-13 13:25       ` Lukasz Luba
2022-04-16  2:47         ` Xuewen Yan
2022-04-19  7:14           ` Vincent Guittot
2022-04-19 12:01             ` Lukasz Luba
2022-04-19 12:51               ` Vincent Guittot
2022-04-19 14:13                 ` Lukasz Luba
2022-04-21  8:29                   ` Vincent Guittot
2022-04-21 10:57                     ` Lukasz Luba
2022-04-26  7:39                       ` Vincent Guittot
2022-04-29  9:27                         ` Lukasz Luba
2022-04-20 13:51 ` Qais Yousef
2022-04-21  8:07   ` Xuewen Yan
2022-04-21 16:15     ` Qais Yousef
2022-04-25  1:31       ` Xuewen Yan
2022-04-25 16:12         ` Qais Yousef
2022-04-26  2:07           ` Xuewen Yan
2022-04-26  8:09             ` Vincent Guittot
2022-04-26  9:30               ` Qais Yousef
2022-04-26 10:06                 ` Vincent Guittot
2022-04-26 13:06                   ` Qais Yousef
2022-04-26  9:21             ` Qais Yousef
2022-04-27  1:38               ` Xuewen Yan
2022-04-27 10:58                 ` Qais Yousef
2022-05-01  3:20                   ` Xuewen Yan
2022-05-03 14:43                     ` Qais Yousef
2022-05-09  2:29                       ` Xuewen Yan
2022-05-10 14:56                         ` Qais Yousef
2022-05-10 17:44                           ` Lukasz Luba
2022-05-10 18:44                             ` Qais Yousef
2022-05-10 22:03                               ` Lukasz Luba
2022-05-14 15:01                                 ` Xuewen Yan
2022-05-14 23:55                                   ` Qais Yousef
2022-05-15  0:53                                     ` [PATCH] sched/rt: Support multi-criterion fitness search for kernel test robot
2022-05-15  1:43                                     ` kernel test robot
2022-05-19 14:16                                     ` [sched] 0eee64011b: canonical_address#:#[##] kernel test robot
2022-05-19 14:16                                       ` kernel test robot
2022-06-15 10:13                                     ` [PATCH] sched: Take thermal pressure into account when determine rt fits capacity Qais Yousef
2022-06-15 11:17                                       ` Xuewen Yan
2022-06-15 13:54                                         ` Qais Yousef

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