Hello workgroup, our WG has several open MPI-2.2 items. I am listing them here for discussion. We should make progress on all of them (i.e., bring them to e review-ready state or request more feedback from the forum). We should discuss the remaining open items in the mailinglist and/or during our next teleconference (the Thursday after SC08). Here are the items: #23 (Generalized v-collectives: allow unknown recvcounts / rdispls): - seems to have several problems and the benefits seem to be very limited (main concerns: benefits only exist for small messages and an upper bound to the cumulative message size has to be known before the operation. So the user could as well do a non-vector operations with slightly larger buffers and achieve higher performance with negligible memory overhead. It is also unclear how to implement this performing (e.g., with a tree algorithm) without excessive memory copies and forcing serial receives.) #24 (Add a local Reduction Function): - seems to be ready for first reading - Jesper volunteered to add required changes to document, I will review #27 (Regular (non-vector) version of MPI_Reduce_scatter): - is missing a use-case, implementation and a clear benefit #30 (Clarification to intercomm MPI_Barrier): - awaiting reviews #31 (Add MPI_IN_PLACE option to Alltoall): - it's still unclear whether we want MPI_IN_PLACE or MPI_Alltoall_replace() - we should have a straw-vote during the next telecon (after SC) and update the proposal #33 (Fix Scalability Issues in Graph Topology Interface): - issue if we want weights (and what weights) or not is open - otherwise it seems ready for a first reading - we should come to a conclusion with the weight issues before proceeding and update the proposal #38 (Matched probe/receive): - seems to fit better in p2p WG - will move over #44 (Non blocking versus non-blocking versus nonblocking): - trivial, ready for reviews by chapter authors #26 (Add a callback function if a request completes): - relatively clear "no" for 2.2 - will move to p2p WG New additions are still welcome! All the best, Torsten -- bash$ :(){ :|:&};: --------------------- http://www.unixer.de/ ----- Torsten Hoefler | Postdoctoral Researcher Open Systems Lab | Indiana University 150 S. Woodlawn Ave. | Bloomington, IN, 474045, USA Lindley Hall Room 135 | +01 (812) 855-3608