On Wed, 2009-05-13 at 09:56 +0300, Avi Kivity wrote:
> Ross Boylan wrote:
> > I just installed XP into a new VM, specifying -smp 2 for the machine.
> > According to top, it's using nearly 200% of a cpu even when I'm not
> > doing anything.
> >
> > Is this real CPU useage, or just a reporting problem (just as my disk
> > image is big according to ls, but isn't really)?
> >
> > If it's real, is there anything I can do about it?
> >
> > kvm 0.7.2 on Debian Lenny (but 2.6.29 kernel), amd64. Xeon chips; 32
> > bit version of XP pro installed, now fully patched (including the
> > Windows Genuine Advantage stuff, though I cancelled it when it wanted to
> > run).
> >
> > Task manager in XP shows virtually no CPU useage.
> >
> > Please cc me on responses.
> >
> >
>
> I'm guessing Windows uses a pio port to sleep, which kvm doesn't
> support. Can you provide kvm_stat output?
markov:~# kvm_stat -1
efer_reload 0 0
exits 9921384 566
fpu_reload 267970 0
halt_exits 1 0
halt_wakeup 3 0
host_state_reload 4026050 17
hypercalls 0 0
insn_emulation 1329455 0
insn_emulation_fail 154 0
invlpg 176773 0
io_exits 3818270 0
irq_exits 1434046 566
irq_injections 326730 0
irq_window 164827 0
largepages 0 0
mmio_exits 35892 0
mmu_cache_miss 29760 0
mmu_flooded 19908 0
mmu_pde_zapped 15557 0
mmu_pte_updated 82088 0
mmu_pte_write 97990 0
mmu_recycled 0 0
mmu_shadow_zapped 43276 0
mmu_unsync 891 0
mmu_unsync_global 0 0
nmi_injections 0 0
nmi_window 0 0
pf_fixed 1231164 0
pf_guest 276083 0
remote_tlb_flush 115606 0
request_irq 0 0
request_nmi 0 0
signal_exits 5 0
tlb_flush 960198 0
This is with the VM displaying the XP "It is now safe to turn off your
computer". CPU remains about 200% from kvm. Invoked with
sudo vdeq kvm -net nic,vlan=1,macaddr=52:54:a0:12:01:00 \
-net vde,vlan=1,sock=/var/run/vde2/tap0.ctl \
-std-vga -hda XP.raw \
-boot c \
-soundhw es1370 -localtime -no-acpi -m 1G -smp 2
Next I'll trying fiddling with acpi.
--
Ross Boylan wk: (415) 514-8146
185 Berry St #5700 ross@xxxxxxxxxxxxxxxx
Dept of Epidemiology and Biostatistics fax: (415) 514-8150
University of California, San Francisco
San Francisco, CA 94107-1739 hm: (415) 550-1062
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