Build Error: Cannot build OpenBLAS with OpenMP enabled and having NUM_PARALLEL > 30

Question

Build Error: Cannot build OpenBLAS with OpenMP enabled and having NUM_PARALLEL > 30

shivammonaka opened this issue 5 months ago · 4 comments

I am doing some experiment, I want to build OpenBLAS with OpenMP enabled with NUM_PARALLEL=60 on a 64 core machine. I know it might have some issues during run-time but I am not even able to build it.

It fails this check always:

Please let me know how to fix this issue.

Answer 1 · 2024-06-09T13:19:27.000Z

I suspect you may be running out of stack space, check your ulimit settings ?

Answer 2 · 2024-06-13T05:03:55.000Z

I tried with ulimit -s unlimited, Still the same issue

Answer 3 · 2024-06-13T05:47:23.000Z

it is running out of memory in the "fork after fork" test - where it tries to fork another 64-thread instance from the already forked process. If you really need to experiment with this, comment out the fork tests in the utest makefile

Answer 4 · 2024-06-13T05:48:39.000Z

I will add perror statements to the test case later when I have time - they should make it clearer why the test failed