[LITMUS^RT] CONFIG_HZ and event driven schedulers

[Glenn Elliott]

Out of curiosity, I have a simple question about the proper setting for CONFIG_HZ (Linux's tick rate).

If we presume the following:
* the scheduler is event-driven (all of Litmus's schedulers but pfair)
* we do not use quantum budget enforcement
* hrtimers are supported

is there a benefit to setting CONFIG_HZ=1000?  Couldn't we set CONFIG_HZ=100 without increasing latency of real-time scheduling?  We would also benefit from reduced tick overheads.

Thanks,
Glenn