add more output in very verbose mode.

[[Imported from SVN: r1364]]

dune/istl/communicator.hh

@@ -1417,11 +1417,13 @@ namespace Dune
       processMap[i]=info->first;
       if(FORWARD) {
         assert(info->second.second.start_*sizeof(typename CommPolicy<Data>::IndexedType)+info->second.second.size_ <= recvBufferSize );
+        Dune::dvverb<<rank<<": receiving "<<info->second.second.size_<<" from "<<info->first<<std::endl;
         MPI_Irecv(recvBuffer+info->second.second.start_, info->second.second.size_,
                   MPI_BYTE, info->first, commTag_, communicator_,
                   recvRequests+i);
       }else{
         assert(info->second.first.start_*sizeof(typename CommPolicy<Data>::IndexedType)+info->second.first.size_ <= recvBufferSize );
+        Dune::dvverb<<rank<<": receiving "<<info->second.first.size_<<" to "<<info->first<<std::endl;
         MPI_Irecv(recvBuffer+info->second.first.start_, info->second.first.size_,
                   MPI_BYTE, info->first, commTag_, communicator_,
                   recvRequests+i);
@@ -1432,12 +1434,15 @@ namespace Dune
     i=0;
     for(const_iterator info = messageInformation_.begin(); info != end; ++info, ++i)
       if(FORWARD) {
+        assert(info->second.second.start_*sizeof(typename CommPolicy<Data>::IndexedType)+info->second.second.size_ <= recvBufferSize );
+        Dune::dvverb<<rank<<": sending "<<info->second.first.size_<<" to "<<info->first<<std::endl;
         assert(info->second.first.start_*sizeof(typename CommPolicy<Data>::IndexedType)+info->second.first.size_ <= sendBufferSize );
         MPI_Issend(sendBuffer+info->second.first.start_, info->second.first.size_,
                    MPI_BYTE, info->first, commTag_, communicator_,
                    sendRequests+i);
       }else{
         assert(info->second.second.start_*sizeof(typename CommPolicy<Data>::IndexedType)+info->second.second.size_ <= sendBufferSize );
+        Dune::dvverb<<rank<<": sending "<<info->second.second.size_<<" to "<<info->first<<std::endl;
         MPI_Issend(sendBuffer+info->second.second.start_, info->second.second.size_,
                    MPI_BYTE, info->first, commTag_, communicator_,
                    sendRequests+i);