Comment # 19 on bug 1196438 from Dirk Mueller

(In reply to Yousaf  Kaukab from comment #17)

> So for SLE the consensus is to keep CONFIG_HZ=250.

I assume you mean SLE15 here? I think the discussion should be open ended with
SLE16. 

> Cyril recommended to keep  CONFIG_HZ=250 citing the bug fixed by commit c7fcb99877f9 and Mel
> recommended to keep SLE and ALP aligned which implies CONFIG_HZ=250 for ALP
> as well. 

I'm sorry, but that means there can be no progress of anything anywhere ever.
But the matter of fact is that we are improving the config continuously based
on feedback. 


> So I agree we should revert the change. Objections?

Well, what about the original suggestion to use a value that is evenly
divisible for the user space metrics?
I checked again, and RHEL9/10 is going with 100 HZ. So if your concern is that
the number of tick interrupts is causing performance issues, why not go to the
*same* value across all architectures, and pick a value that is evenly
divisible by 100 (the userspace HZ)? Like 100? (or 300, for that matter)

I picked 300 because it was closest to the original 250 which I thought is the
least concern overall. There were no conclusive benchmarks showing it would be
a problem. Why can we not run with that to see partner and customer feedback
prior release?