Description of problem:
xenperf fails with:
Error getting number of perf counters: 38 (Function not implemented)
Version-Release number of selected component (if applicable):
Steps to Reproduce:
just start xenperf
xenperf fails because the hypervisor is not built with performance counters.
So, this is not a bug.
If you think they should be enabled, please reopen the bug and state your
business case for this feature.