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fix srun latency, change default yield_when_idle=0 #3971

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Merged
merged 1 commit into from
Aug 3, 2017
Merged

fix srun latency, change default yield_when_idle=0 #3971

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4 changes: 2 additions & 2 deletions ompi/runtime/ompi_mpi_params.c
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Original file line number Diff line number Diff line change
Expand Up @@ -62,7 +62,7 @@ bool ompi_mpi_keep_fqdn_hostnames = false;
bool ompi_have_sparse_group_storage = OPAL_INT_TO_BOOL(OMPI_GROUP_SPARSE);
bool ompi_use_sparse_group_storage = OPAL_INT_TO_BOOL(OMPI_GROUP_SPARSE);

bool ompi_mpi_yield_when_idle = true;
bool ompi_mpi_yield_when_idle = false;
int ompi_mpi_event_tick_rate = -1;
char *ompi_mpi_show_mca_params_string = NULL;
bool ompi_mpi_have_sparse_group_storage = !!(OMPI_GROUP_SPARSE);
Expand Down Expand Up @@ -107,7 +107,7 @@ int ompi_mpi_register_params(void)
*/
/* JMS: Need ORTE data here -- set this to 0 when
exactly/under-subscribed, or 1 when oversubscribed */
ompi_mpi_yield_when_idle = true;
ompi_mpi_yield_when_idle = false;
(void) mca_base_var_register("ompi", "mpi", NULL, "yield_when_idle",
"Yield the processor when waiting for MPI communication (for MPI processes, will default to 1 when oversubscribing nodes)",
MCA_BASE_VAR_TYPE_BOOL, NULL, 0, 0,
Expand Down