Re: [Xen-users] Xenperf cannot work after I installed Xen on CentOS 6

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Mon, 2014-05-19 at 08:41 +0000, Ma, Sixiang wrote:
> Hi:
> 
>                 The problem I incurred is that I cannot use âxenperfâ
> after I installed Xen. When I try to execute xenperf, the console
> shows: âError getting number of perf counters: 38 (Function not
> implemented)â.

Perf counter support is a compile time option on the hypervisor side,
since it has some overhead. You will need to rebuild your hypervisor
with "perfc=y" on the make command line. Optionally you can also add
perfc_arrays=y to get some additional functionality wrt breaking down
some of the large categories.

Ian.



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