Hi,
I am trying to scatterv/gatherv an stl vector of vectors, but it doesn't
seem to work, but if I try to do it using a 2d array, it works fine, is
there anything special in the way the memory is allocated in the case of stl
vectors, that is making it not to work correctly?.
Here is my piece of code
tmpSkyMatrix[size][d]
vector <vector<int> > PointsTmp (size, vector<int>(d)); //allocate space in
the vector of vectors
....//do some computation
//with a 2d matrix works fine
MPI_Gatherv(skyMatrix, localSkySize, MPI::INT, tmpSkyMatrix, receiveCount,
disp, MPI::INT, ROOT, MPI_COMM_WORLD);
//with a vector of vector crashes
MPI_Gatherv(&localSkyline[0][0], localSkySize, MPI::INT, &PointsTmp[0][0],
receiveCount, disp, MPI::INT, ROOT, MPI_COMM_WORLD);
In case you wonder why I rather use an stl vector, it is because my
computation is making use of some stl algorithms, I just need to send the
resulting data accross the processor, but this data is stored in a vector of
vectors, and is very costly, to load that data into a 2d array, then receive
it, and load it in a vector of vectors again to do some other processing.
Thanks in advance
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