Hello, I was trying to investigate some processes with strace under Open MPI. However I have some issues when MPI I/O functionality is included writing data to a NFS file system.
mpirun -np 2 strace -f ./hello-world mpi-io does not return and strace is stuck reporting infinite "poll" calls. However, the program works fine without strace. I tried with Open MPI 3.x and 4.0.1 switching between ompi and romio on different operating systems (CentOS 7.6, SLES 12). I'd appreciate any hints which help me to understand what is going on. Best Christoph -- Christoph Niethammer High Performance Computing Center Stuttgart (HLRS) Nobelstrasse 19 70569 Stuttgart Tel: ++49(0)711-685-87203 email: nietham...@hlrs.de http://www.hlrs.de/people/niethammer _______________________________________________ users mailing list users@lists.open-mpi.org https://lists.open-mpi.org/mailman/listinfo/users
