Intel® oneAPI HPC Toolkit
Get help with building, analyzing, optimizing, and scaling high-performance computing (HPC) applications.
Announcements
This community is designed for sharing of public information. Please do not share Intel or third-party confidential information here.
1917 Discussions

What is the purpose fo using -rr and -grr round robin options of mpiexec utility ?

ArthurRatz
Black Belt
178 Views

Dear Collegues, I've got a question for you : what is the purpose fo using -rr and -grr round robin options of mpiexec utility ?

Thanks in advance.

Cheers, Arthur.

0 Kudos
2 Replies
Artem_R_Intel1
Employee
178 Views

Hi Arthur,

According to the Intel® MPI Library for Linux* OS Reference Manual:

-perhost <# of processes >, -ppn <# of processes >, or -grr <# of processes>
Use this option to place the indicated number of consecutive MPI processes on every host in the group using round robin scheduling. See the I_MPI_PERHOST environment variable for more details.
-rr
Use this option to place consecutive MPI processes on different hosts using the round robin scheduling. This option is equivalent to -perhost 1. See the I_MPI_PERHOST environment variable for more details.

ArthurRatz
Black Belt
178 Views

Thanks for your reply.

Reply