On Tue, May 25, 2010 at 11:06:33PM -0500, Rajeev Thakur wrote:

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I meant that MPI_Accumulate should be specified here, either in the yes or no column.

I think "can be used only" says all. We also don't say that it can't be used in reductions etc..

We do. The text says

"MPI_NO_OP can be used only in MPI_GET_ACCUMULATE and MPI_ACCUMULATE_GET, not in collective reduction operations, such as MPI_REDUCE and others."

It begs the question what about MPI_Accumulate? Ok, finally added :-). See wiki.

Torsten -- bash$ :(){ :|:&};: --------------------- http://www.unixer.de/ ----- Torsten Hoefler | Research Associate Blue Waters Directorate | University of Illinois 1205 W Clark Street | Urbana, IL, 61801 NCSA Building | +01 (217) 244-7736