Hi Chengming,
On 7/21/22 12:04 PM, Chengming Zhou Wrote:
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.
The {soft,}irq affection should be equal to all the runnable tasks
on that cpu, not only rq->curr. Further I think irqstall is per-cpu
rather than per-cgroup.
Abel
