Implement TODOs

02-MSA-hello-world-gpu/hello-world.c

@@ -24,8 +24,13 @@ int main(int argc, char** argv){
     
     const char *payload = "world!";
 
+    // TODO: Implement the MPI_Send call to send the six characters of "payload" to rank 1
     if (rank == 0) {
+    #ifdef SOLUTION
         MPI_Send(payload, 6, MPI_CHAR, 1, tag, MPI_COMM_WORLD);
+    #else
+        MPI_Send();
+    #endif
     }
 
     printf("\n");

02-MSA-hello-world-gpu/hello-world.cu

@@ -51,8 +51,13 @@ int main(int argc, char** argv){
     CUDA_RT_CALL( cudaPeekAtLastError() );
     CUDA_RT_CALL( cudaDeviceSynchronize() );
     
+    // TODO: Implement the MPI_Recv() call to receive the "payload" from rank 1 using directly "d_payload" as the target buffer on the GPU
     if (rank == 1) {
+    #ifdef SOLUTION
         MPI_Recv(d_payload, 6, MPI_CHAR, 0, tag, MPI_COMM_WORLD, &stat);
+    #else
+        MPI_Recv();
+    #endif
     }
     
     hello<<<1, 1>>>(d_payload);