bhyve+windows 7 multicore performance

[Rodney W. Grimes]

> >> i run bhyve VM like this:
> >> nice -n -20 /usr/sbin/bhyve -s 0,hostbridge -m 22528M \
> > ^^^^^^^^^^^^  why?
> 
> to make sure VM will not be slower down too much if i put other high load 
> on host site.
> 
> >
> >>
> >> But windows feels quite slower that it was before. There is for sure no
> >> problem with I/O performance. It's about compute speed.
> >
> > How did you measure this?  If it is just a "feel" then it could
> > be almost anything, if you have some solid numbers to look at
> > then perhaps some conclusions can be made.
> >
> >> What i do wrong?
> >
> > Try 4 cores, and drop the priority boost, you may be causeing
> 
> Well i need more cores than 4 for that VM.
> I will try even number (10) and no nice.

If 4 cores performs better than 10 cores why would you want
to intentionally slow it down?

> > an unintended side effect.
> 
> 
> 
> 
> >
> > Did you copy the windows 7 from the old server, or is this
> > a new install to the VM.  If you copied it there may be a
> > HAL issue/missmatch.
> Copied, and installed missing drivers.
> 
> I didn't install windoze for over 5 years :)

Ok, this may mean there is a HAL missmatch.

-- 
Rod Grimes                                                 rgrimes at freebsd.org