Stderr When Running OpenLB in Parallel Across High Number of Cores

[anandanandan86]

Hello, I am trying to run OpenLB in a highly-parallelized HPC environment using mpirun. I can run the sample case I have prepared across 8 cores, but to achieve higher speeds, I would like to increase to up to 50 cores. However, when I try to run the case with such high parallelization, I am getting the following error (stderr):

stderr: /lib/x86_64-linux-gnu/libc.so.6(_libc_start_main+0xf3)
[0x7ff49e63c0b3]
[dc006bdb2618:03053] [11] ./roomspec(+0x23ace)[0x559446d95ace]
[dc006bdb2618:03053] *** End of error message ***
./roomspec(+0x2370b)[0x555660cae70b]
[dc006bdb2618:03064] [10] /lib/x86_64-linnux-gnu/libc.so.6
(_libc_start_main+0xf3)]0x7fda7a1530b3]
[dc006bdb2618:03064] [11] ./roomspec(+0x23ace)[0x555660caeace]
[dc006bdb2618:03064] *** End of error message ***

I cannot determine at all what is causing this error, so I would like to request, could anyone give any insight as to what this error message is indicating and any possible root causes?

[Adrian]

Can you share your config.mk and the script / command you used to run this? Did you test the 8 and 50 core executions on the exact same node?

[Author]

Posts