Hello,

Samuel Thibault, le ven. 15 mars 2024 10:31:54 +0100, a ecrit:

Lucas Nussbaum, le mer. 13 mars 2024 15:56:40 +0100, a ecrit:

[P0T0] Starting EZTrace (pid: 878489)...
[P0T0] MPI mode selected
This program requires 2 MPI processes, aborting...
dir: mpi_ping_trace
/bin/rm: cannot remove 'mpi_ping_trace': Directory not empty
[P0T0] Stopping EZTrace (pid:878489)...
[P0T0] Starting EZTrace (pid: 878488)...
[P0T0] MPI mode selected
This program requires 2 MPI processes, aborting...
[P0T0] Stopping EZTrace (pid:878488)...
[OK]

The test does run 2 processes. I tried this:

$ cat test.c
#include <mpi.h>
#include <stdio.h>
int main(int argc, char *argv[]) {
int rank, size;
MPI_Init(&argc, &argv);
MPI_Comm_rank(MPI_COMM_WORLD, &rank);
MPI_Comm_size(MPI_COMM_WORLD, &size);
printf("I'm %d/%d\n", rank, size);
return 0;
}

And it reports:

$ mpirun -np 2 ./test
Authorization required, but no authorization protocol specified

Authorization required, but no authorization protocol specified

Authorization required, but no authorization protocol specified

Authorization required, but no authorization protocol specified

I'm 0/1
I'm 0/1

and the same with a hosts file containing localhost twice.

I tried with disabling PMIX (commenting PMIX:= --with-pmix=/usr/lib/$(DEB_HOST_MULTIARCH)/pmix2), and that fixed it.

Unless somebody complains, I will NMU that change, to get back mpich
working in unstable.

Samuel

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