> > > > > > > > perf stat -a -e amd_nb/config=0x37,config1=0x20/ /bin/ls > amd_uncore_find_online_sibling() > function is broken.
and that's the problem. uncore_find_online_sibling() does all kinds of wrong things including sticking active uncore structures in uncore->free_when_cpu_online Then uncore_online() comes along and frees those structures. Then some other part of the kernel comes and re-uses the free'd data. Then when we try to start an event, all of the fields are invalid because the uncore pointer is pointing to re-used data. I don't have a patch because I am not 100% clear on what uncore_find_online_sibling() is doing in the first place. Vince
