I had to hack around one thing to make perf+libpfm4 work with uncore events:
--- a/lib/pfmlib_perf_event.c
+++ b/lib/pfmlib_perf_event.c
@@ -153,7 +153,7 @@ pfmlib_perf_event_encode(void *this, const char *str, int
dfl_plm, void *data)
attr->exclude_user = !(plm & PFM_PLM3);
attr->exclude_kernel = !(plm & PFM_PLM0);
- attr->exclude_hv = !(plm & PFM_PLMH);
+ //attr->exclude_hv = !(plm & PFM_PLMH);
The problem is that the kernel expects exclude_hv == 0, otherwise the
perf_event_open syscall errors out. However, if I pass PFM_PLMH
pfm_get_perf_event_encoding(), I get a different error.
static int
pfm_nhm_unc_get_encoding(void *this, pfmlib_event_desc_t *e)
{
...
if (e->dfl_plm != (PFM_PLM0|PFM_PLM3)) {
DPRINT("dfl_plm must be PLM0|PLM3 with Intel uncore PMU\n");
return PFM_ERR_INVAL;
}
}
Perhaps there is a better answer?
-Arun
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