[xiao]

Hi all,

I am writing a parallel code and need to do a reduce operation on a vector array, i.e.

someScalar = some number in local cpu;
someArray = new vector[100];

For the scalar it should be:
reduce(someScalar, sumOp<scalar>());

What would be corresponding operation for the array? Would this work?

reduce(someArray, sumOp<vector[]>());

Doing this element-wise would be slow, I imagine, because there is too much communication involved.

Thanks very much!

Best,
Heng