Hello all,
Up to this point I've been using task_smpl with libpfm4 to get process-wide
performance counters, but I would like to be able to get counts for specific
regions of interest. I was trying to search the archives and found a
relevant feature for perfmon2, but seemingly nothing for libpfm4.
Most of the things that I want to run these types of region of interest
tests on are my own little toy programs, so I can easily augment them
however I please. What I was thinking was just to setup a semaphore that
will start out locked. The parent process in task_smpl will just sem_wait()
right before the core loop, and the child will unlock the semaphore when it
gets to the region of interest.
I'm new to writing IPC code. I've written a small example that behaves as
described above (where the parent doesn't continue executing until the child
gets to a certain point), but I'm not sure if there are any pitfalls that I
could be missing here. Does this sound like a feasible strategy? Is there
some easier way to achieve what I am looking to do?
Thanks,
Paul
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