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| author | Chengming Zhou <zhouchengming@bytedance.com> | 2022-08-25 18:41:08 +0200 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2022-09-09 11:08:32 +0200 |
| commit | 52b1364ba0b105122d6de0e719b36db705011ac1 (patch) | |
| tree | a6601f432fbe2c006addc068eab9b98febf0449c /kernel/sched/stats.h | |
| parent | sched/psi: Remove NR_ONCPU task accounting (diff) | |
| download | linux-52b1364ba0b105122d6de0e719b36db705011ac1.tar.xz linux-52b1364ba0b105122d6de0e719b36db705011ac1.zip | |
sched/psi: Add PSI_IRQ to track IRQ/SOFTIRQ pressure
Now PSI already tracked workload pressure stall information for
CPU, memory and IO. Apart from these, IRQ/SOFTIRQ could have
obvious impact on some workload productivity, such as web service
workload.
When CONFIG_IRQ_TIME_ACCOUNTING, we can get IRQ/SOFTIRQ delta time
from update_rq_clock_task(), in which we can record that delta
to CPU curr task's cgroups as PSI_IRQ_FULL status.
Note we don't use PSI_IRQ_SOME since IRQ/SOFTIRQ always happen in
the current task on the CPU, make nothing productive could run
even if it were runnable, so we only use PSI_IRQ_FULL.
Signed-off-by: Chengming Zhou <zhouchengming@bytedance.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Link: https://lore.kernel.org/r/20220825164111.29534-8-zhouchengming@bytedance.com
Diffstat (limited to 'kernel/sched/stats.h')
| -rw-r--r-- | kernel/sched/stats.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/sched/stats.h b/kernel/sched/stats.h index c39b467ece43..84a188913cc9 100644 --- a/kernel/sched/stats.h +++ b/kernel/sched/stats.h @@ -110,6 +110,7 @@ __schedstats_from_se(struct sched_entity *se) void psi_task_change(struct task_struct *task, int clear, int set); void psi_task_switch(struct task_struct *prev, struct task_struct *next, bool sleep); +void psi_account_irqtime(struct task_struct *task, u32 delta); /* * PSI tracks state that persists across sleeps, such as iowaits and @@ -205,6 +206,7 @@ static inline void psi_ttwu_dequeue(struct task_struct *p) {} static inline void psi_sched_switch(struct task_struct *prev, struct task_struct *next, bool sleep) {} +static inline void psi_account_irqtime(struct task_struct *task, u32 delta) {} #endif /* CONFIG_PSI */ #ifdef CONFIG_SCHED_INFO |