Martin,

On Mon, May 25, 2009 at 6:16 PM, Martin Vogt <v...@itwm.fraunhofer.de> wrote:
>
> Hello List,
>
> I have here a system with 32cores (shanghai)  and
> installed vanilla 2.6.28.1
> with the lates perfmon-2.6.28-1.diff and libpfm.
> (from the sourceforge page)
>
> The amd system seems to load the perfmon module:
>
>>perfmon: found family=16 IBSCTL=0x101
>>perfmon: NorthBridge socket-level event access control: enabled
>>perfmon: IBS supported
>>perfmon: AMD64 PMU installed
>
> But when I'm in:
>
>>libpfm-3.8/examples/x86
>
> I get:
>>./smpl_amd64_ibs ls
>>Your kernel does not have performance monitoring support!
>

Typically you get this message if there is a mismatch between
the libpfm perfmon syscall numbers and the kernel. Make sure
that the examples are linked with the correct libpfm (the one the
example belongs to). You may have one installed already.

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