Hi. I want to ask you a question about ISR/DPC and C-State.
When I was investigating performance of my laptop using xperf, I found that C-State could stay at C3 state although ISR/DPC used 100% of the CPU at the moment.
I think it's bizarre because C3 means that the internal clock is stopped and CPU has to be woken up to C0 in order to make ISR/DPC executed.
Why can such a thing happen?
The figure below shows one of the events I met.