> With hyperthread turns on, the num_online_cpus reports the number of all
> logical cores.
> What I found in testing is only half the cores receives the mce broadcast, so
> I assume only the physical cores get broadcast.
See Intel Software Developer Manual Volume 3B Section 15.10.4.1, 3rd bullet:
o For processors on which CPUID reports DisplayFamily_DisplayModel as
06H_0EH and onward, an MCA signal is
broadcast to all logical processors in the system
Your E-5645 processors are a lot newer than this cut-off version - so they
should broadcast
to all your threads.
You are seeing something very strange. It would be interesting to know *which*
12 cpus
show up for your machine check. Perhaps you are seeing all the hyperthreads
from one
socket and none from the other?
I still suspect that something is strange in the EDAC error injection side of
this problem
and that you are not getting a h/w initiated INT#18 event.
-Tony
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