fix mpi init/set device order

mpi_daxpy_gt.cc

@@ -47,29 +47,31 @@ void set_rank_device(int n_ranks, int rank) {
 
 int main(int argc, char **argv) {
     int n = 1024;
-    int world_size, world_rank;
+    int world_size, world_rank, device_id;
     uint32_t vendor_id;
 
     double a = 2.0;
     double sum = 0.0;
 
-    auto x = gt::empty<double>({n});
-    auto y = gt::empty<double>({n});
-    auto d_x = gt::empty_device<double>({n});
-    auto d_y = gt::empty_device<double>({n});
-
     MPI_Init(NULL, NULL);
 
     MPI_Comm_size(MPI_COMM_WORLD, &world_size);
     MPI_Comm_rank(MPI_COMM_WORLD, &world_rank);
 
+    set_rank_device(world_size, world_rank);
+
+    auto x = gt::empty<double>({n});
+    auto y = gt::empty<double>({n});
+    auto d_x = gt::empty_device<double>({n});
+    auto d_y = gt::empty_device<double>({n});
+
     for (int i=0; i<n; i++) {
         x[i] =  i+1;
         y[i] = -i-1;
     }
 
-    set_rank_device(world_size, world_rank);
-    vendor_id = gt::backend::clib::device_get_vendor_id(gt::backend::clib::device_get());
+    device_id = gt::backend::clib::device_get();
+    vendor_id = gt::backend::clib::device_get_vendor_id(device_id);
 
     gt::blas::handle_t* h = gt::blas::create();
 
@@ -87,7 +89,7 @@ int main(int argc, char **argv) {
         //printf("%f\n", y[i]);
         sum += y[i];
     }
-    printf("%d/%d [%x] SUM = %f\n", world_rank, world_size, vendor_id, sum);
+    printf("%d/%d [%d:0x%08x] SUM = %f\n", world_rank, world_size, device_id, vendor_id, sum);
 
     MPI_Finalize();