[pve-devel] Tickless kernel or not

[Dietmar Maurer]

> > Redhat uses since RHEL7 a fully tickless kernel. Options:
> > CONFIG_NO_HZ=y
> > CONFIG_NO_HZ_FULL=y
> > CONFIG_RCU_FAST_NO_HZ=n
> > CONFIG_HZ_1000=y
> > CONFIG_HZ=1000
> > 
> > PVE now uses:
> > CONFIG_NO_HZ=y
> > CONFIG_NO_HZ_IDLE=y
> > CONFIG_RCU_FAST_NO_HZ=y
> > CONFIG_HZ_250=y
> > CONFIG_HZ=250
> 
> I just use the default config provided by RH/Ubuntu for that.
> 
> Does it matter somehow?

Reading the docs:

https://www.kernel.org/doc/Documentation/timers/NO_HZ.txt

seems the current options are preferred?