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mpirun: add cli option to turn off gpu support #51

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mpirun: add cli option to turn off gpu support #51

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2 changes: 2 additions & 0 deletions src/mca/schizo/ompi/schizo-ompi-cli.rstxt
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Original file line number Diff line number Diff line change
Expand Up @@ -163,6 +163,8 @@ MPI Options
attached to predefined communicators during the first MPI call.
* ``--memory-alloc-kinds``: Value is a comma separated list of
memory allocation kinds.
* ``--disable-gpu-support``: Specify to disable any accelerator support
built in to the Open MPI installation at run time.
* ``--display-comm``: Display table of communication methods between
MPI_COMM_WORLD ranks during MPI_Init
* ``--display-comm-finalize``: Display table of communication methods
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12 changes: 11 additions & 1 deletion src/mca/schizo/ompi/schizo_ompi.c
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Expand Up @@ -19,7 +19,7 @@
* and Technology (RIST). All rights reserved.
* Copyright (c) 2018-2022 IBM Corporation. All rights reserved.
* Copyright (c) 2021-2024 Nanook Consulting All rights reserved.
* Copyright (c) 2022-2024 Triad National Security, LLC. All rights
* Copyright (c) 2022-2025 Triad National Security, LLC. All rights
* reserved.
* $COPYRIGHT$
*
Expand Down Expand Up @@ -194,6 +194,7 @@ static struct option ompioptions[] = {
PMIX_OPTION_DEFINE(PRTE_CLI_DISABLE_RECOVERY, PMIX_ARG_NONE),
PMIX_OPTION_DEFINE(PRTE_CLI_CONTINUOUS, PMIX_ARG_NONE),
PMIX_OPTION_DEFINE("with-ft", PMIX_ARG_REQD),
PMIX_OPTION_DEFINE("disable-gpu-support", PMIX_ARG_NONE),

/* mpiexec mandated form launch key parameters - MPI 4.0 */
PMIX_OPTION_DEFINE("initial-errhandler", PMIX_ARG_REQD),
Expand Down Expand Up @@ -1612,6 +1613,15 @@ static int parse_env(char **srcenv, char ***dstenv,
}
}

if (NULL != (opt = pmix_cmd_line_get_param(results, "disable-gpu-support"))) {
rc = check_cache(&cache, &cachevals, "disable_gpu_support", "true");
if (PRTE_SUCCESS != rc) {
PMIX_ARGV_FREE_COMPAT(cache);
PMIX_ARGV_FREE_COMPAT(cachevals);
return rc;
}
}

if (pmix_cmd_line_is_taken(results, "display-comm") &&
pmix_cmd_line_is_taken(results, "display-comm-finalize")) {
PMIX_SETENV_COMPAT("OMPI_MCA_ompi_display_comm", "mpi_init,mpi_finalize", true, dstenv);
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