[petsc-users] Question about -memory_view

Jorti, Zakariae zjorti at lanl.gov
Wed Apr 12 15:08:53 CDT 2023


I am running some matrix computations on 64 nodes, using 640 MPI tasks.

And I wanted to check the memory usage with the -memory_view flag.

I get the following output:

Summary of Memory Usage in PETSc
Maximum (over computational time) process memory:        total 3.1056e+11 max 5.9918e+08 min 4.2213e+08
Current process memory:                                  total 1.9194e+11 max 3.9960e+08 min 2.2761e+08

What is the difference between maximum process memory and current process memory?
What does total mean here? (in each node or total of all the nodes)

Also, if the job fails because of memory shortage, will this -memory_view still output some information?

Thank you.


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