I have read the slides and have some comments on the issues related to MPI_INIT time assertions (slide 4). 1) I agree the set of assertions must be negotiated but unanimous implementor acceptance should not be needed. Defining a assertion in the standard that does not help a particular MPI implementation is pretty harmless. Defining one that does not help any implementation is useless. Implementors are in a good position to recognize assertions that can never be useful and help kill them but no implementor should have veto power.. 2) I have not heard a decent rationale for implementation specific assertions. Assertions are not about the implementation. They are about a particular application and its requirements in relation to the MPI standard. The MPI implementation simply ignores any assertion that is not useful to optimizing that implementation. 3) a) Any tool that intercepts variants of MPI_INIT can remove assertions it does not like. Removing an assertion can never make an application quit working properly. b) I am not sure what "Layered underlying libraries" means but the observation on the slide does apply to what I would call "third party libraries". If some library that will be linked into an application (say a parallel math library) makes calls to MPI_Cancel for ISEND requests than that library should check that the MPI_NO_SEND_CANCEL assertion was not used and bail out if it was. Dick Dick Treumann - MPI Team/TCEM IBM Systems & Technology Group Dept 0lva / MS P963 -- 2455 South Road -- Poughkeepsie, NY 12601 Tele (845) 433-7846 Fax (845) 433-8363 "Supalov, Alexander" <alexander.supalo To v_at_[hidden]> "MPI 3.0 Sub-setting working group" Sent by: <mpi3-subsetting_at_lists.mpi-forum.or mpi3-subsetting-b g> ounces_at_lists.mpi- cc forum.org Subject Re: [Mpi3-subsetting] call for a 06/27/2008 08:55 report-out and session chair AM Please respond to "MPI 3.0 Sub-setting working group" <mpi3-subsetting@ lists.mpi-forum.o rg> Hi everybody, Rich Graham kindly agreed to chair the subsetting meeting for us. A draft report-out can be found in http://svn.mpi-forum.org/trac/mpi-forum-web/attachment/wiki/SubsettingWikiPa... . I have to use a change-protected PDF for this external publication. Please comment. I've also added last meeting minutes, and am setting about updating the proposal accordingly now. Best regards. Alexander From: Supalov, Alexander Sent: Thursday, June 26, 2008 5:36 PM To: 'MPI 3.0 Sub-setting working group' Subject: call for a report-out and session chair Hi everybody, As I won't be at the meeting next week, we need a volunteer to report out to the Forum and then chair the subsetting WG meeting 5:15 pm - 7:00 pm on Tuesday, June 1. Who wants to do this? Please let me know. In the meantime, I'll prepare and upload a draft report-out, and update the current proposal using the materials of our recent meeting by EOW. Best regards. Alexander -- Dr Alexander Supalov Intel GmbH Hermuelheimer Strasse 8a 50321 Bruehl, Germany Phone: +49 2232 209034 Mobile: +49 173 511 8735 Fax: +49 2232 209029 --------------------------------------------------------------------- Intel GmbH Dornacher Strasse 1 85622 Feldkirchen/Muenchen Germany Sitz der Gesellschaft: Feldkirchen bei Muenchen Geschaeftsfuehrer: Douglas Lusk, Peter Gleissner, Hannes Schwaderer Registergericht: Muenchen HRB 47456 Ust.-IdNr. VAT Registration No.: DE129385895 Citibank Frankfurt (BLZ 502 109 00) 600119052 This e-mail and any attachments may contain confidential material for the sole use of the intended recipient(s). Any review or distribution by others is strictly prohibited. If you are not the intended recipient, please contact the sender and delete all copies. _______________________________________________ mpi3-subsetting mailing list mpi3-subsetting_at_[hidden] http://lists.mpi-forum.org/mailman/listinfo.cgi/mpi3-subsetting *
