Frank Wein wrote: [...] Or basically my question could also be rephrased as: Is there a barrier mechanism I could use in OMPI that causes basically very few to no CPU usage (with higher latency then)? Intel MPI for example seems to have the env var "I_MPI_WAIT_MODE=1" which uses some wait mechanism instead of polling for a barrier. My idea for OMPI was to use SIGSTOP/SIGCONT in combination with MPI_Barrier, but I'm open for other suggestions as well if those work better (or at all).
Frank
