Hi, here are my notes on today's telecon: ** Attendees (alphabetically): - Greg Bronevetsky (LLNL) - Torsten Hoefler (IU) - Jesper Larsson Traff (NEC) - Andrew Lumsdaine (IU) - Amith Mamidala (OSU) - Adam Moody (LLNL) - Rolf VandeVaart (Sun) ** Disucussions (cf. Agenda): 1) Jesper: step back, should NBC be in the standard at all? Why not modularize it? - Andrew: pro standardization -- portability is higher for standardized things -- people won't use them -- higher performance if it is in the library - Torsten: we have an implementation for NBC (http://www.unixer.de/research/nbcoll/libnbc/), BSD license (can be packaged with MPI) - Torsten: it's confusing to have NBC as a separate library and blocking colls not (see sent mails) - Torsten: have a more modularized standard a) Jesper and Torsten agree to have no tags - no further discussion b) allow multiple outstanding requests c) Torsten: MPI Forum approach does not work Greg: it could be optimized (putting threads to sleep) but it will still be slow and horrible to program d) Torsten, Andrew: no matching necessary Jesper: no matching possible in the standard e) Torsten: no request free/cancel Andrew: there might be a situation (loosely coupled apps) Torsten: look at and understand p2p issues first Greg: Fault Tolerance? f) Torsten: don't change anything, stick with the old way 3) Jesper: proposed approach is too limited b) Torsten: merge with 4) c) Jesper has a paper about this on IPDPS 4) IU goes off and proposes better ideas, Jesper wants to join 5) Jesper writes proposal-like document 6) contact mpi3-subsetting and see what they think general things: - next meeting in March in Chicago - have proposals ready at leat one week before meeting in March - contact more application people (forward to Torsten) - contact Asian researchers (Jesper?) The full recording (68:43) is available for private use (contact me). Best, Torsten -- bash$ :(){ :|:&};: --------------------- http://www.unixer.de/ ----- Indiana University | http://www.indiana.edu Open Systems Lab | http://osl.iu.edu/ 150 S. Woodlawn Ave. | Bloomington, IN, 474045-7104 | USA Lindley Hall Room 135 | +01 (812) 855-3608