On 09/03/2010 03:21 PM, Michael Tokarev wrote:
Hello.
I noticed that window7, unlike windowsXP as I played with
previously, poses quite high load on host when idle. On
my machine, host cpu usage is about 25% when one single-cpu
win7 guest is running with "-usbdevice tablet" option.
Here's a typical kvm_stats when such a guest is idling:
efer_reload 0 0
exits 991832 695
fpu_reload 3786 0
halt_exits 7759 67
halt_wakeup 7717 67
host_state_reload 613116 495
hypercalls 0 0
insn_emulation 873244 488
insn_emulation_fail 0 0
invlpg 0 0
io_exits 582925 409
irq_exits 30188 8
irq_injections 41093 0
irq_window 0 0
largepages 288 0
mmio_exits 16718 0
mmu_cache_miss 217 0
mmu_flooded 0 0
mmu_pde_zapped 0 0
mmu_pte_updated 0 0
mmu_pte_write 0 0
mmu_recycled 0 0
mmu_shadow_zapped 269 0
mmu_unsync 0 0
nmi_injections 0 0
nmi_window 0 0
pf_fixed 20630 0
pf_guest 0 0
remote_tlb_flush 176 0
request_irq 0 0
That's pretty good for an idle guest.
What does the guest think it is doing? The Windows performance monitor?
--
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.
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