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print GPU device ID for MPI ranks within a node

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This commit is contained in:
JamesEMcclure 2019-04-26 14:56:53 -04:00
parent d15f5aff86
commit fe5a110027
3 changed files with 1 additions and 2 deletions
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1
gpu/Extras.cu
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@ -9,6 +9,7 @@ extern "C" int ScaLBL_SetDevice(int rank){
//int device = local_rank % n_devices; //int device = local_rank % n_devices;
int device = rank % n_devices; int device = rank % n_devices;
cudaSetDevice(device); cudaSetDevice(device);
if (rank < n_devices) printf("MPI rank=%i will use GPU ID %i / %i \n",rank,device,n_devices);
return device; return device;
} }

1
tests/lbpm_color_simulator.cpp
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@ -41,7 +41,6 @@ int main(int argc, char **argv)
} }
// Initialize compute device // Initialize compute device
int device=ScaLBL_SetDevice(rank); int device=ScaLBL_SetDevice(rank);
if (rank<4) printf("Using GPU ID %i for rank %i \n",device,rank);
ScaLBL_DeviceBarrier(); ScaLBL_DeviceBarrier();
MPI_Barrier(comm); MPI_Barrier(comm);

1
tests/lbpm_permeability_simulator.cpp
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@ -44,7 +44,6 @@ int main(int argc, char **argv)
} }
// Initialize compute device // Initialize compute device
int device=ScaLBL_SetDevice(rank); int device=ScaLBL_SetDevice(rank);
if (rank<4) printf("Using GPU ID %i for rank %i \n",device,rank);
ScaLBL_DeviceBarrier(); ScaLBL_DeviceBarrier();
MPI_Barrier(comm); MPI_Barrier(comm);