Can I know sampling rate of nvhost_podgov?

Can I know sampling rate of the default GPU governor on Jetson TX2, nvhost_podgov?

I could find some sysfs files related to GPU governors in /sys/devices/17000000.gp10b/devfreq/17000000.gp10b

I saw the content in file /sys/devices/17000000.gp10b/devfreq/17000000.gp10b/polling_interval is 25.

Does it mean that sampling rate of GPU governor is 25ms?

One more question.

I think if I use userspace governor, the sampling rate (polling_interval) is not applied anymore.

Is it correct?

I think it’s time interval to polling the GPU workload to adjust the frequency.