Re: KVM Processor cache size

Ulrich Drepper
2010-08-02T13:49:50Z

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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. 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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