Re: [RFC v4 1/2] cpuidle: Extract IPI based and timer based wakeup latency from idle states

[Doug Smythies]

Hi Pratik,

On Mon, Apr 12, 2021 at 12:43 AM Pratik Rajesh Sampat
<psampat@xxxxxxxxxxxxx> wrote:
>
> Introduce a mechanism to fire directed IPIs from a specified source CPU
> to a specified target CPU and measure the difference in time incurred on
> wakeup.
>
> Also, introduce a mechanism to queue a HR timer on a specified CPU and
> subsequently measure the time taken to wakeup the CPU.
>
> Finally define a simple debugfs interface to control the knobs to fire
> the IPI and Timer events on specified CPU and view their incurred idle
> wakeup latencies.
>
> Signed-off-by: Pratik Rajesh Sampat <psampat@xxxxxxxxxxxxx>

Reviewed-by: Doug Smythies <dsmythies@xxxxxxxxx>