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Re: [Qemu-devel] [PATCH 1/2] [RFC] Make vmport report the processor spee
From: |
Alexander Graf |
Subject: |
Re: [Qemu-devel] [PATCH 1/2] [RFC] Make vmport report the processor speed |
Date: |
Wed, 07 Jan 2009 16:44:02 +0100 |
User-agent: |
Thunderbird 2.0.0.18 (X11/20081112) |
François Revol wrote:
>>> Do we implement them yet ? grep got me some MSR_IA32_TSC in kvm.c,
>>> so I
>>> suppose yes.
>>>
>> That is the TSC value MSR I guess. So no, we don't implement them
>> yet.
>> But that sounds like a way better interface to me than the VMware
>> backdoor ;).
>>
>
> Maybe implementing it properly would fix running ESX without the need
> for vmport ?
>
I haven't seen VMware accessing the relevant MSR, so I guess no :-(.
>>> Oh, I didn't notice rdtscp, might be interesting to use instead for
>>> Haiku.
>>>
>> Maybe using a PV clocksource is even better ...
>>
>
> ?
>
Xenner for example uses the KVM_CLOCK to do timings, because the guest
never really knows what time it is. There was a comment on that earlier
in this thread by Avi IIRC too. If you're running virtualized, it's
usually best to use a paravirtualized clocksource.
Alex
- Re: [Qemu-devel] [PATCH 1/2] [RFC] Make vmport report the processor speed, (continued)
- Re: [Qemu-devel] [PATCH 1/2] [RFC] Make vmport report the processor speed, François Revol, 2009/01/05
- Re: [Qemu-devel] [PATCH 1/2] [RFC] Make vmport report the processor speed, Jamie Lokier, 2009/01/06
- Re: [Qemu-devel] [PATCH 1/2] [RFC] Make vmport report the processor speed, Alexander Graf, 2009/01/07
- Re: [Qemu-devel] [PATCH 1/2] [RFC] Make vmport report the processor speed, François Revol, 2009/01/07
- Re: [Qemu-devel] [PATCH 1/2] [RFC] Make vmport report the processor speed, Alexander Graf, 2009/01/07
- Re: [Qemu-devel] [PATCH 1/2] [RFC] Make vmport report the processor speed, François Revol, 2009/01/07
- Re: [Qemu-devel] [PATCH 1/2] [RFC] Make vmport report the processor speed, Alexander Graf, 2009/01/07
- Re: [Qemu-devel] [PATCH 1/2] [RFC] Make vmport report the processor speed, François Revol, 2009/01/07
- Re: [Qemu-devel] [PATCH 1/2] [RFC] Make vmport report the processor speed,
Alexander Graf <=
Re: [Qemu-devel] [PATCH 1/2] [RFC] Make vmport report the processor speed, Anthony Liguori, 2009/01/07