kern.hz = 10

[Mister Olli]

Hi,

> Due to bad performance of high HZ in VMs, in 8-CURRENT it is
> explicitly reduced to 10 if the kernel is running under any kind of
> virtual environment. This is a somewhat theoretical number and
> probably needs tuning.

Oh I didn't knew that. *SORRY*


> If you're interested in trying it out, you can increase it by adding
> "kern.hz=xxx" to /boot/loader.conf and seeing what is the actual
> performance influence of high HZ under Xen.

I've run on 100HZ quite some time now and did have the impression that
8-CURRENT is slow. It's even faster on copy processes as 7 under VMware
on a host machine which is 3 years younger...

..
Mr. Olli