On Mon, 23 May 2022 17:37:09 +0300, David Kra said:

> I am considering modifying the scheduler and governor to get a jackrabbit
> start whenever a process is dispatched. Before learning how to, I would
> like some advice on whether to, and how much to do.

Step 0: gather actual data, and see if you will get any significant observable 
boost.

(If you don't know how to test if you will get any improvement,  you probably 
don't
know how to test for improvement after the patch is done.  So you may as well do
that part up front, unglamorous as it may be)

Hint:  powertop is your friend (or are the cool kids using something else this 
week?)

> * Is there a better way to achieve the same result?

It would probably be a lot easier to just set the CPU governor to "performance" 
mode.

> * Is this a dumb thing to do?
Probably, but it will depend on your use case.

> * Is it safe to rely on the existing code, firmware, and microcode to handle 
> the
>  subsequent downclocking, and for my hack to only do the upclocking?

Well, you're just going to turn around and upclock it at the end of that 
process's
tiimeslice, so it's unclear what real benefit you'd get from downclocking.



_______________________________________________
Kernelnewbies mailing list
Kernelnewbies@kernelnewbies.org
https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies

Reply via email to