[mpich-discuss] MPICH Test Suite - limit number of processes

[Max R. Dechantsreiter]

I would like to limit the number of processes used by the
MPICH Test Suite, which I run by "make testing" after
building MPICH.

I tried

export MPITEST_PPNMAX=<n> # The maximum number of processes per node.

but this had no apparent effect: some tests still ran
using more than 4 processes, when I replaced <n> by 4.
How could I restrict these tests to run with maximum 4
processes, for example?