Added missing cudaDeviceSynchronize()

Author: harrism

posts/unified-memory/dataElem_um_c++_1.cu

@@ -7,10 +7,12 @@ public:
   void *operator new(size_t len) {
     void *ptr;
     cudaMallocManaged(&ptr, len);
+    cudaDeviceSynchronize();
     return ptr;
   }
 
   void operator delete(void *ptr) {
+    cudaDeviceSynchronize();
     cudaFree(ptr);
   }
 };

posts/unified-memory/dataElem_um_c++_2.cu

@@ -9,10 +9,12 @@ public:
   void *operator new(size_t len) {
     void *ptr;
     cudaMallocManaged(&ptr, len);
+    cudaDeviceSynchronize();
     return ptr;
   }
 
   void operator delete(void *ptr) {
+    cudaDeviceSynchronize();
     cudaFree(ptr);
   }
 };