On 06/16/2011 05:19 PM, David Ahern wrote:
On 06/16/2011 08:08 AM, David Ahern wrote: > Command: > perf stat -e instructions openssl speed aes Hmm.. this might be the wrong benchmark for this. I thought openssl-speed was a purely CPU intensive benchmark which should have fairly similar performance numbers in both host and guest. I seem to recall this as true 2 or so years ago, but that is not the case with 3.0-rc2 and F14. Using a benchmark Vince W. wrote seems better: http://www.csl.cornell.edu/~vince/projects/perf_counter/million.s perf stat -e instructions ./million Performance counter stats for './million': 1,113,650 instructions # 0.00 insns per cycle
Maybe it's sensitive to a cpuid bit which we don't pass through - likely a bug in qemu or perhaps in kvm.
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