Swmr test

Example call mpirun -np 4 build/hdf5_minimal 3 3 314 && h5dump example.h5

hdf5_minimal/hdf5.cpp

@@ -77,6 +77,14 @@ if (comm_rank == 0) {
   hid_t s = H5Pset_chunk(dcpl, 1, &chunk_size) ;
   hid_t dset = H5Dcreate(file, "1D", H5T_STD_I32LE, fspace, H5P_DEFAULT, dcpl,
                          H5P_DEFAULT);
+  assert(s>=0);
+  printf("[%d] Dcreate ", comm_rank); 
+
+  hid_t g = H5Gcreate(file, "/meshes", H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
+  hid_t dset = H5Dcreate(file, "1D", H5T_STD_I32LE, fspace, H5P_DEFAULT, dcpl,
+                         H5P_DEFAULT);
+  hid_t dset2= H5Dcreate(g, "2D", H5T_STD_I32LE, fspace, H5P_DEFAULT, dcpl,
+                         H5P_DEFAULT);
 
   assert(dset >= 0);
   H5Pclose(dcpl) ;
@@ -104,7 +112,11 @@ printf("[%d] write start", comm_rank);
   H5Dwrite(dset, H5T_NATIVE_INT, mspace, fspace, H5P_DEFAULT,
                   v.data()) ;
 
-  
+    H5Dwrite(dset2, H5T_NATIVE_INT, mspace, fspace, H5P_DEFAULT,
+                  v.data()) ;
+                      H5Dflush(dset2);
+                    H5Dclose(dset2);
+                    H5Gclose(g);
   printf("[%d] write done", comm_rank);
   // extend
   hsize_t new_size=size;