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How can core dumps be disabled or limited?

Core dumps are enabled on JUQUEEN by default.

Due to the fact that writing core files from thousands of nodes takes (too) much time, the generating of core files may be suppressed or limited.

How to disable core files?

The BG_COREDUMPDISABLED environment variable must be set to 1 and exported to the runjob environment:

export BG_COREDUMPDISABLED=1

runjob --exe <filename> --exp-env BG_COREDUMPDISABLED

How to limit the number of core files?

The BG_COREDUMPDISABLED environment variable must be set to the number of requested core files and exported to the runjob environment:

export BG_COREDUMPMAXNODES=<n>

runjob --exe <filename> --exp-env BG_COREDUMPMAXNODES

How to read core files?

Core files are plain text files that include traceback information in hexadecimal.

To read and convert the hexadecimal addresses the tool addr2line may help.
For more information use

addr2line -h

(Compilation should have included option -g)


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