Some folks from ORNL have done some studies about OMPI memory usage a few
years ago, but I am not sure if these studies are openly available. OMPI
manages all the MCA parameters, user facing requests, unexpected messages,
temporary buffers for collectives and IO. And those are, I might be
slightly
Hi George,
Got it, thanks for the info - I naively hadn't even considered that of
course all the related libraries likely have their *own* allocators. So,
for *OpenMPI, *it sounds like I can use my own opal_[mc]alloc calls, with a
new build turning mem debugging on, to tally up and report the t
Brian,
OMPI does not have an official mechanism to report how much memory OMPI
allocates. But, there is hope:
1. We have a mechanism to help debug memory issues (OPAL_ENABLE_MEM_DEBUG).
You could enable it and then provide your own flavor of memory tracking in
opal/util/malloc.c
2. You can use a
Hi all,
I'm wondering if there's a simple way to get statistics from OpenMPI as
to how much memory the *MPI* layer in an application is taking. For
example, I'm running a model and I can get the RSS size at various points
in the code, and that reflects the user data for the application, *plus*,
