From 1bfa339ccfb75e80d5d975a118848dd2058bcb49 Mon Sep 17 00:00:00 2001 From: Masamichi Takagi Date: Thu, 30 Jul 2020 15:10:42 +0900 Subject: [PATCH] man: mcexec: add "-n " option mandatory when using MPI (except Fujitsu MPI) Change-Id: I6d2d0337fdab13325642344529401f86bbadfdcd --- executer/user/mcexec.1in | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/executer/user/mcexec.1in b/executer/user/mcexec.1in index 8b93bc63..f75cfd43 100644 --- a/executer/user/mcexec.1in +++ b/executer/user/mcexec.1in @@ -22,11 +22,15 @@ are described below. .TP .B -n N -Specify the number of MPI ranks run on the node. -e.g., +Specify the number of MPI ranks run on the node when using MPI (except Fujitsu MPI). +For example, +.br $ mpirun -n 32 -ppn 4 mcexec -n 4 ./a.out -In the above example, the ./a.out program runs on eight nodes each of +.br +the ./a.out program runs on eight nodes each of which has four processes. +You must specify this option when using MPI (except Fujitsu MPI). +Undefined behavior entails if not. .TP .B -t N