On Tue, Jul 29, 2008 at 10:47:42AM +0200, Jesper Larsson Traeff wrote:

Hello everybody,

On Mon, Jul 28, 2008 at 02:17:50PM -0400, Torsten Hoefler wrote:

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Hello Collectives Workgroup, I just added our open MPI-2.2 items to the list.

good. I'll try to add something, too:

MPI_Reduce_scatter_block Extended binary reduction operators for segmented scans Clarification on intercomm Barrier

great! I just added them to the Agenda which is now on: https://svn.mpi-forum.org/trac/mpi-forum-web/wiki/Telecon073108

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Please review items 13-16 on https://svn.mpi-forum.org/trac/mpi-forum-web/wiki/MpiTwoTwoWikiPage

The deadline for things to be considered for MPI-2.2 is next Friday.

uuh - well... yeah, I am sure that I heard this at the last meeting but I didn't find it written down anywhere. So it might not be ``enforced'' :).

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I dropped the partial pack/unpack from our list of open issues because large datatypes can be disassembled via query functions and thus packed in pieces with MPI_TYPE_GET_ENVELOPE and MPI_TYPE_GET_CONTENTS.

I disagree with this argument. While it is possible, it leaves completely to the user (in this case: high-level library implementer) to implement these pack/unpack functions efficiently, and this is not a trivial task at all yes, but we could easily write a library doing this with the current functions. It's an algorithmic problem, not an implementation problem in my opinion (i.e., I don't see much that can be gained by doing it in the library).

I have been hesitant in posting a concrete proposal because the exposed partial packing functions should also make sense in a heterogeneous environment, and I'm not sure how to handle this (I'm not even sure MPI_Pack/Unpack do...) oh yes. We'll talk about this on the telecon.

Thus: I'll try to post something this week... at least, we should discuss about this at the teleconf.

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Please add any missing items and/or corrections to the wiki and/or feel free to discuss them on the list.

I think your fixes to the topology interface needs more ok, please comment on the wiki or bring it up during the telecon!

Thanks & 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