Re: kvm very slow

Luca
2007-08-07T11:32:16Z

On 8/7/07, Ulrich Schreiner <ulrich.schreiner-sZDnKEZIvs8b1SvskN2V4Q@public.gmane.org> wrote:
> Could not configure '/dev/rtc' to have a 1024 Hz timer. This is not a
> fatal
> error, but for better emulation accuracy either use a 2.6 host Linux
> kernel or
> type 'echo 1024 > /proc/sys/dev/rtc/max-user-freq' as root.
>
> well i HAVE a 2.6kernel (2.6.22.1-41.fc7), but i cannot set
> dev.rtc.max-user-freq, i only can set the high precision event timer
>
> dev.hpet.max-user-freq = 1024

Known issue, it's unrelated to KVM. HPET is using the same IRQ as the
cmos RTC so only on of them can deliver the periodical interrupt. I
think that work to program the HPET in dont-break-other-stuff mode is
underway.

Luca