Re: IO on guest is 20 times slower than host

Avi Kivity
2009-03-29T14:29:42Z

Kurt Yoder wrote:
> slow host cpu information, core 1 of 16:
>
> processor : 0
> vendor_id : AuthenticAMD
> cpu family : 16
> model : 4
> model name : Quad-Core AMD Opteron(tm) Processor 8382
> stepping : 2
> cpu MHz : 2611.998
> cache size : 512 KB
> physical id : 0
> siblings : 4
> core id : 0
> cpu cores : 4
> apicid : 0
> initial apicid : 0
> fpu : yes
> fpu_exception : yes
> cpuid level : 5
> wp : yes
> flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca
> cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall mmxext fxsr_opt
> pdpe1gb rdtscp lm 3dnowext 3dnow constant_tsc rep_good nopl pni monitor
> cx16 popcnt lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a
> misalignsse 3dnowprefetch osvw ibs skinit wdt
> bogomips : 5223.97
> TLB size : 1024 4K pages
> clflush size : 64
> cache_alignment : 64
> address sizes : 48 bits physical, 48 bits virtual
> power management: ts ttp tm stc 100mhzsteps hwpstate
>
>
>

Can you loading kvm_amd on this host with 'modprobe kvm-amd npt=0'?

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