Hi,
Perfmon supports both system-wide and per-thread monitoring session. I have a
conceptual question regarding the per-thread monitoring.
Consider we have two threads, application thread and monitoring thread. The
appThread will do it work and the monitoring thread will read the counters. As
from the manual, the monitoring thread will be attached to the appThread by a
context. My queation is:
For the per-thread session, are the counters' values read by monitoring thread
only caused by that particular appThread? Or the monitoring thread will follow
the appThread to whichever core appThread is migrated and read the counters'
value for that core? in details, if the appthread is migrated from core 0 to
core1, the monitoring thread will follow the appthread. The values of the
counters, say last level cache miss, read by the monitoring thread will be only
for that app thread or the core-wide, caused by all the threads running on
that core? In short, does the per-thread session mean it will read system-side
counters following the monitored thread?
Thanks
Tanima.
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