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add mpi barrier before allgather

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This commit is contained in:
Bryce Allen
2020-08-10 11:33:59 -04:00
parent 924b721ad7
commit 909f8880de
1 changed files with 18 additions and 4 deletions
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16
mpi_daxpy_nvtx.cc
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@@ -32,6 +32,8 @@
// column major
#define IDX2C(i,j,ld) (((j)*(ld))+(i))
#define BARRIER
static cublasHandle_t handle;
@@ -85,6 +87,8 @@ int main(int argc, char **argv) {
double k_end_time = 0.0;
double g_start_time = 0.0;
double g_end_time = 0.0;
double b_start_time = 0.0;
double b_end_time = 0.0;
#ifndef MANAGED
double *h_x, *h_y;
@@ -246,8 +250,16 @@ int main(int argc, char **argv) {
nvtxRangePop();
printf("%d/%d SUM = %f\n", world_rank, world_size, sum);
#ifdef BARRIER
b_start_time = MPI_Wtime();
nvtxRangePushA("mpiBarrier");
MPI_Barrier(MPI_COMM_WORLD);
nvtxRangePop();
b_end_time = MPI_Wtime();
#endif
g_start_time = MPI_Wtime();
nvtxRangePushA("allGather");
nvtxRangePushA("mpiAllGather");
nvtxRangePushA("x");
MPI_Allgather(d_x, n, MPI_DOUBLE, d_allx, n, MPI_DOUBLE, MPI_COMM_WORLD);
nvtxRangePop();
@@ -301,6 +313,8 @@ int main(int argc, char **argv) {
end_time-start_time);
printf("%d/%d TIME kernel : %0.3f\n", world_rank, world_size,
k_end_time-k_start_time);
printf("%d/%d TIME barrier: %0.3f\n", world_rank, world_size,
b_end_time-b_start_time);
printf("%d/%d TIME gather : %0.3f\n", world_rank, world_size,
g_end_time-g_start_time);