Hello,
I am trying to use libpfm4.4 and I am having some problems with syst
example (without any parameters). It is unable to open the counter, but it
is with libpfm4.3.
When I ran, I got the following message:
syst: cannot attach event to CPU0 cycles: Invalid argument
I am running on a Intel(R) Core(TM)2 Duo CPU T9400 on kernel 2.6.32.
Everything works fine with libpfm4.3. I tracked down the code and I figured
out that the reason is that exclude_guest and exclude_host are both set to
1 on libpfm4.4 and they are not on libpfm4.3.
So I did the following changes on lib/pfmlib_perf_event.c files (lines 224):
attr->exclude_guest = 0; //!(vmx_plm & PFM_PLM3);
After that, I was able to open the counters.
I have already solved the problem by doing these changes, but I think it
would be valuable to report this issue. Any thoughts about what is going on
would be interested as well.
Best,
--
Leonardo
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