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| author |   Chengming Zhou <zhouchengming@bytedance.com> | 2022-08-26 00:41:08 +0800 |
|---|---|---|
| committer |   Peter Zijlstra <peterz@infradead.org> | 2022-09-09 11:08:32 +0200 |
| commit | 52b1364ba0b105122d6de0e719b36db705011ac1 (patch) | |
| tree | a6601f432fbe2c006addc068eab9b98febf0449c /kernel/sched/core.c | |
| parent | sched/psi: Remove NR_ONCPU task accounting (diff) | |
| download | linux-dev-52b1364ba0b105122d6de0e719b36db705011ac1.tar.xz linux-dev-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 '')
| -rw-r--r-- | kernel/sched/core.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/sched/core.c b/kernel/sched/core.c index ee28253c9ac0..7d1ea9240af0 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -708,6 +708,7 @@ static void update_rq_clock_task(struct rq *rq, s64 delta) rq->prev_irq_time += irq_delta; delta -= irq_delta; + psi_account_irqtime(rq->curr, irq_delta); #endif #ifdef CONFIG_PARAVIRT_TIME_ACCOUNTING if (static_key_false((¶virt_steal_rq_enabled))) { |