* kvm and cpu type
@ 2009-01-22 13:16 Riccardo Veraldi
2009-01-22 13:43 ` Alexander Graf
2009-01-22 16:51 ` Amit Shah
0 siblings, 2 replies; 3+ messages in thread
From: Riccardo Veraldi @ 2009-01-22 13:16 UTC (permalink / raw)
To: kvm
Hello Iam using kvm83 on CentOS5.2
my system has 2x dual Core intel CPU
Intel(R) Xeon(R) CPU 5110 @ 1.60GHz
asdetected by Centos.
If I start kvm-qemu with no CPU option everythign works and hte guest
machine detects cpu as
QEMU Virtual CPU version 0.9.1
iv I run qemu-kvm -cpu core2duo
the guest hangs at boot time when it detects the CPU.
I do not know how to fix it.
I also do not know if using -cpu swtch can improve performances.
thank you
Rick
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: kvm and cpu type
2009-01-22 13:16 kvm and cpu type Riccardo Veraldi
@ 2009-01-22 13:43 ` Alexander Graf
2009-01-22 16:51 ` Amit Shah
1 sibling, 0 replies; 3+ messages in thread
From: Alexander Graf @ 2009-01-22 13:43 UTC (permalink / raw)
To: Riccardo Veraldi; +Cc: kvm
Riccardo Veraldi wrote:
> Hello Iam using kvm83 on CentOS5.2
>
> my system has 2x dual Core intel CPU
>
> Intel(R) Xeon(R) CPU 5110 @ 1.60GHz
>
> asdetected by Centos.
>
> If I start kvm-qemu with no CPU option everythign works and hte guest
> machine detects cpu as
>
> QEMU Virtual CPU version 0.9.1
>
>
> iv I run qemu-kvm -cpu core2duo
>
> the guest hangs at boot time when it detects the CPU.
>
> I do not know how to fix it.
>
> I also do not know if using -cpu swtch can improve performances.
Yes, -cpu core*duo is broken in kvm < 84. Please use the default.
There's usually no real benefit for anyone to use a specific cpu type,
unless you know that you need it.
Alex
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: kvm and cpu type
2009-01-22 13:16 kvm and cpu type Riccardo Veraldi
2009-01-22 13:43 ` Alexander Graf
@ 2009-01-22 16:51 ` Amit Shah
1 sibling, 0 replies; 3+ messages in thread
From: Amit Shah @ 2009-01-22 16:51 UTC (permalink / raw)
To: Riccardo Veraldi; +Cc: kvm
On (Thu) Jan 22 2009 [14:16:15], Riccardo Veraldi wrote:
> Hello Iam using kvm83 on CentOS5.2
>
> my system has 2x dual Core intel CPU
>
> Intel(R) Xeon(R) CPU 5110 @ 1.60GHz
>
> asdetected by Centos.
>
> If I start kvm-qemu with no CPU option everythign works and hte guest
> machine detects cpu as
>
> QEMU Virtual CPU version 0.9.1
>
>
> iv I run qemu-kvm -cpu core2duo
>
> the guest hangs at boot time when it detects the CPU.
>
> I do not know how to fix it.
This is a known problem and has been fixed for the upcoming kvm-84
release.
> I also do not know if using -cpu swtch can improve performances.
It shouldn't matter much.
Amit
^ permalink raw reply [flat|nested] 3+ messages in thread
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2009-01-22 13:43 ` Alexander Graf
2009-01-22 16:51 ` Amit Shah
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