Re: KVM Processor cache size

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On 08/02/2010 08:49 AM, Ulrich Drepper wrote:
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On 08/02/2010 05:51 AM, Andre Przywara wrote:
Do you have a use case for the cache size or is this just out of curiosity?
glibc uses the cache size information returned by cpuid to perform
optimizations.  For instance, copy operations which would pollute too
much of the cache because they are large will use non-temporal
instructions.  There are real performance benefits.

I imagine that there would be real performance problems from doing live migration with -cpu host too if we don't guarantee these values remain stable across migration...

Regards,

Anthony Liguori

   Even the synthetic
CPU provided by qemu should have a more realistic value.

- -- ➧ Ulrich Drepper ➧ Red Hat, Inc. ➧ 444 Castro St ➧ Mountain View, CA ❖
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