Re: Lost of performance over AMD-V with KVM?

[Gleb Natapov <gleb@redhat.com>]

On Tue, Jul 09, 2013 at 05:07:57PM +0200, Victor fernandez wrote:
> Yep,
> 
>     -> this is for the host:
> 
>     root@vfalbor-desktop:~# cat /proc/cpuinfo | grep flags | uniq
>     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 nx
> mmxext fxsr_opt pdpe1gb rdtscp lm 3dnowext 3dnow constant_tsc
> rep_good nonstop_tsc extd_apicid amd_dcm pni monitor cx16 popcnt
> lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse
> 3dnowprefetch osvw ibs skinit wdt nodeid_msr
> 
>     -> this is for the VM:
>     [root@sl6 ~]# cat /proc/cpuinfo | grep flags | uniq
>     flags        : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr
> pge mca cmov pat pse36 clflush mmx fxsr sse sse2 syscall nx mmxext
> fxsr_opt pdpe1gb lm rep_good extd_apicid pni cx16 popcnt lahf_lm
> cmp_legacy cr8_legacy abm sse4a misalignsse 3dnowprefetch
> 
Hmm, what is your kernel and qemu versions?

> 
> El 09/07/13 17:00, Gleb Natapov escribió:
> >On Tue, Jul 09, 2013 at 04:57:13PM +0200, Victor fernandez wrote:
> >>     2.- with the "-cpu host" parameter:
> >>
> >>/usr/bin/kvm *-cpu host* -m 2048 -smp 1 -name i-2-11-VM -monitor
> >>telnet:127.0.0.1:9941,server,nowait -boot c /mnt/b07f7f29-7b9b-3d4b-b170-77876d10e7b1/134bc689-1207-487c-ae95-6c0dc2e0f285
> >>-parallel none -usb -usbdevice tablet -vnc :0 -vga cirrus -net
> >>nic,macaddr=06:00:90:00:00:08,vlan=0,model=e1000,name=e1000.0 -net
> >>tap,script=/usr/bin/qemu-ifup,vlan=0,name=tap.0
> >>
> >With this command line can you provide output of /proc/cpuinfo on the
> >host and the guest?
> >
> >--
> >			Gleb.
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> 

--
			Gleb.