Re: [PATCH v3 2/9] KVM-HDR Add constant to represent KVM MSRs enabledbit

From: Glauber Costa
Date: Thu Jun 30 2011 - 09:22:22 EST


On 06/30/2011 09:59 AM, Eric B Munson wrote:
On Thu, 30 Jun 2011, Avi Kivity wrote:

On 06/30/2011 12:56 AM, Eric B Munson wrote:
My mail provider seems to have dropped patch 1 of the series so I can't reply
directly to it, please add my Tested-by there as well.

How did you test it then?


I built host and guest kernels with the patches and pinned a while(1) and the
CPU thread from qemu to CPU 2 on the host. I then started the same while(1)
process in guest and verified that I see ~50% steal time reported.

I then built 2.6.39 (just the code I had present) on the guest and time it
while it was competing with the while(1) on the host for CPU time. Next I
built the guest kernel with STEAL_TIME=N and reran the kernel compile to make
sure that there weren't any huge variations in performace.

Eric
I think what Avi means is, it won't even compile without PATCH 1/9. If you don't have it, how could you test it ?

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