Ivan Voras <ivo...@freebsd.org> writes:

> 2009/1/30 Julian Stecklina <j...@alien8.de>:
>> Mister Olli <mister.o...@googlemail.com> writes:
>>> Hi,
>>> I've never experimented with the kern.hz variable, but on all
>>> configuration examples for 8-CURRENT if always seen 'kern.hz=100'.
>>>>From where did you get your configuration?
>> I use the default config (albeit renamed to BLITZXEN) from 8-CURRENT.
> 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.


> 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 am going to do that once the timing stuff is figured out. No point in
making benchmarks when the clock is confused. :)

I cannot repeat it enough: Still great to see FreeBSD on Xen!

Julian Stecklina

Well, take it from an old hand: the only reason it would be easier to
program in C is that you can't easily express complex problems in C,
so you don't. - Erik Naggum (in comp.lang.lisp)

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