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[mpi3-coll] Updates after first reading
by Torsten Hoefler 29 Dec '08

29 Dec '08

Hello, I updated the document with all comments that I received at the last meeting. I created tickets for the more compplicated issues. I assigned four reviewers to each ticket and ask them to drive the discussion (the people who were most active in the discussion at the last meetings). However, everybody should review the changes and review the tickets. I am open for comments and suggestions. The new document is at [1] and in the wiki [2] and the LaTeX diff [3]. [1]: http://www.unixer.de/sec/nbc-proposal-12-29-2008.pdf [2]: https://svn.mpi-forum.org/trac/mpi-forum-web/attachment/wiki/NBColl/nbc-pro… [3]: http://www.unixer.de/sec/nbc-proposal-12-29-2008.diff The detailed list of changes: 1) p1:18-41 - added all MPI_Ixxx calls to 5.1 2) p3:11 - "callers" changed to caller's 3) p3:22 - added new sentence (proposed by Jesper): "A blocking operation is complete as soon as the call returns. a Nonblocking call requires a separate completion operation" -> ref. to Sec 3.7 4) p3:23 - "call" changed to "operation" 5) p3:26 - "function" changed to "operation" 6) p5-7:all - added non-blocking versions (also to the next paragraphs) 7) p49:38-42 - added semantic advantages 8) p50:4-6 - removed send buffer restrictions! "All associated send buffers should not be modified and all associated receive buffers should not be accessed between init and completion" -> opened separate ticket (need to clarify send and receive buffers!?) #81 - reviewers: Erez, Darius, Jeff, Keith 9) p49:34 - added comma: communication"," which is eventually 10) p49:41-42 - system resources: asked Jeff for details (change P2P too)! #82 - reviewers: Jeff, Rich, Bronis, Keith 11) p50:7-10 - dropped "Advice to implementors" completely 12) p50:11-12 - replaced regexp by "all request test and completion functions (e.g., MPI_Wait)" 13) p50:13-16 - mention that mixing with other requests as possible (I/O, NB P2P) 14) p50:19-21 - rationale against MPI_Request_free, offline to ML (I updated it) #83 - reviewers: Jesper, Rolf, Bill, Erez 15) p50:19-28 - combine rationales and put them after the paragraph 16) p51:22 - add rational why cancel is not supported -> semantically unclear 17) p50:22 - point-to-point -> collective =) 18) p50:17 - new paragraph before "Coll operations" 19) p50:22-23 - rationale: "consistent for blocking call + additional benefit is HW support" 20) p50:31 - "in the same order per communicator" 21) p50:37 - have to -> could 22) p50:36 - only need -> would be 23) p50:40 - advice for users: "this is different than for P2P" 24) p51:1 - "will be ignored" -> ask Jeff (change text and advice to users) #84 - Jeff, Jesper, Rolf, Bronis 25) p51:9 - extra space "est )" (removed all spaces before ")" and after "(" in the whole chapter 26) p51:21-22 - "every process called MPI_Ibarrier" 27) p51:14 - operation -> call 28) pxx:xx - operation -> call! everywhere -> the word operation is overloaded (MPI Operation and Collective Operation) - do we care? #85 - Bronis, Jeff, Rolf, Bill 29) p67:24 - mixed -> blocking calls can be interleaved 30) p67:34 - after -> until 31) p68:33 - dropped "huge" 32) p69:44-48 - made advice weaker 33) p69:45 - should -> could 34) p69:44 - can potentially -> may 35) p69:44 - dropped "huge" 36) p69:44-48 - rephrase advice to implementors: Keith, Jeff, Bronis, Rolf #86 - Keith, Jeff, Bronis, Rolf 37) p70:11-24 - add picture 38) p70:27 - remove "very" 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

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Re: [mpi3-coll] Official reading of NBC - Re: Notes from Telecon
by Torsten Hoefler 17 Dec '08

17 Dec '08

I have to announce another (nonfundamental wording) update based on Rolf's third partial review and Jeff's review that I got this morning (thanks!)! The PDF is at [1] and [2]. The diff is at [3]. [1]: https://svn.mpi-forum.org/trac/mpi-forum-web/attachment/wiki/NBColl/nbc-pro… [2]: http://www.unixer.de/sec/nbc-proposal-12-17-2008-2.pdf [3]: http://www.unixer.de/sec/nbc-proposal-12-17-2008-2.diff -- 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

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Re: [mpi3-coll] Official reading of NBC - Re: Notes from Telecon
by Torsten Hoefler 17 Dec '08

17 Dec '08

I have to announce another (nonfundamental wording) update based on Rolf's second partial review that I got this morning (thanks!)! The PDF is at [1] and [2]. The diff is at [3]. [1]: https://svn.mpi-forum.org/trac/mpi-forum-web/attachment/wiki/NBColl/nbc-pro… [2]: http://www.unixer.de/sec/nbc-proposal-12-17-2008.pdf [3]: http://www.unixer.de/sec/nbc-proposal-12-17-2008.diff -- 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

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Re: [mpi3-coll] Official reading of NBC - Re: Notes from Telecon
by Torsten Hoefler 16 Dec '08

16 Dec '08

I have to announce another (nonfundamental wording) update based on Adam's review (thanks!)! The PDF is at [1] and [2]. The diff is at [3]. [1]: https://svn.mpi-forum.org/trac/mpi-forum-web/attachment/wiki/NBColl/nbc-pro… [2]: http://www.unixer.de/sec/nbc-proposal-12-16-2008-2.pdf [3]: http://www.unixer.de/sec/nbc-proposal-12-16-2008-2.diff -- 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

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Re: [mpi3-coll] Official reading of NBC - Re: Notes from Telecon
by Torsten Hoefler 16 Dec '08

16 Dec '08

I have to announce another (nonfundamental wording) update based on Rolf's partial review (thanks!)! The PDF is at [1] and [2]. The diff is at [3]. [1]: https://svn.mpi-forum.org/trac/mpi-forum-web/attachment/wiki/NBColl/nbc-pro… [2]: http://www.unixer.de/sec/nbc-proposal-12-16-2008.pdf [3]: http://www.unixer.de/sec/nbc-proposal-12-16-2008.diff 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

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Re: [mpi3-coll] Official reading of NBC - Re: Notes from Telecon
by Torsten Hoefler 15 Dec '08

15 Dec '08

Another (slight wording) update! The PDF is at [1] and [2]. The diff is at [3]. [1]: https://svn.mpi-forum.org/trac/mpi-forum-web/attachment/wiki/NBColl/nbc-pro… [2]: http://www.unixer.de/sec/nbc-proposal-11-26-2008-2.pdf [3]: http://www.unixer.de/sec/nbc-proposal-12-15-2008-2.diff 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

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Re: [mpi3-coll] Official reading of NBC - Re: Notes from Telecon
by Torsten Hoefler 15 Dec '08

15 Dec '08

On Thu, Dec 11, 2008 at 01:00:09PM -0500, Torsten Hoefler wrote: > Rolf, > > is the proposal > > http://www.unixer.de/sec/nbc-proposal-11-26-2008.pdf > > and > > https://svn.mpi-forum.org/trac/mpi-forum-web/attachment/wiki/NBColl/nbc-pro… > > the basis for the official reading of NBC on Wed 17, 10:30-11:30 > > at the MPI Forum meeting in San Francisco? > > yes! Please let me know if you have any suggestions or corrections. > > I will announce every change to the document on this list. I just updated the proposal with Jesper's face-to-face comments. The new version is in the wiki [1] and mirrored at [2]. It were mostly small changes in phrasing, the diff-file of the source that enumerates all changes is at [3]. The latest version will be used for the reading on Wednesday. Best, Torsten [1]: https://svn.mpi-forum.org/trac/mpi-forum-web/attachment/wiki/NBColl/nbc-pro… [2]: http://www.unixer.de/sec/nbc-proposal-12-15-2008.pdf [3]: http://www.unixer.de/sec/nbc-proposal-12-15-2008.diff -- 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

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Re: [mpi3-coll] Official reading of NBC - Re: Notes from Telecon
by Torsten Hoefler 11 Dec '08

11 Dec '08

Rolf, > is the proposal > http://www.unixer.de/sec/nbc-proposal-11-26-2008.pdf > and > https://svn.mpi-forum.org/trac/mpi-forum-web/attachment/wiki/NBColl/nbc-pro… > the basis for the official reading of NBC on Wed 17, 10:30-11:30 > at the MPI Forum meeting in San Francisco? yes! Please let me know if you have any suggestions or corrections. I will announce every change to the document on this list. 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

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[mpi3-coll] Official reading of NBC - Re: Notes from Telecon
by Rolf Rabenseifner 11 Dec '08

11 Dec '08

Torsten, is the proposal http://www.unixer.de/sec/nbc-proposal-11-26-2008.pdf and https://svn.mpi-forum.org/trac/mpi-forum-web/attachment/wiki/NBColl/nbc-pro… the basis for the official reading of NBC on Wed 17, 10:30-11:30 at the MPI Forum meeting in San Francisco? Best regards Rolf On Wed, 26 Nov 2008 16:30:16 -0500 Torsten Hoefler <htor(a)cs.indiana.edu> wrote: > Hello, > I put my notes from today's teleconference at: > https://svn.mpi-forum.org/trac/mpi-forum-web/wiki/Telecon112608 > >Feel free to extend the page. I also updated the proposal document at > [1] and http://www.unixer.de/sec/nbc-proposal-11-26-2008.pdf > > I try to attach patchfiles to every update, so that it is easier for >you > to track changes (let me know if that helps). The first one is >attached > to this mail. > > Best, > Torsten > > [1]: >https://svn.mpi-forum.org/trac/mpi-forum-web/attachment/wiki/NBColl/ > > -- > 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 Dr. Rolf Rabenseifner . . . . . . . . . .. email rabenseifner(a)hlrs.de High Performance Computing Center (HLRS) . phone ++49(0)711/685-65530 University of Stuttgart . . . . . . . . .. fax ++49(0)711 / 685-65832 Head of Dpmt Parallel Computing . . . www.hlrs.de/people/rabenseifner Nobelstr. 19, D-70550 Stuttgart, Germany . (Office: Allmandring 30)

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[mpi3-coll] MPI 2.2 items for Collectives Chapter
by Adam Moody 05 Dec '08

05 Dec '08

Hello everyone, I'd like to make sure that we attempt to make progress on each item before the next meeting. If you own a ticket, could you please send a response with your ticket number? Torsten, do we have a list of the 2.2 items to be reviewed which fall in the collectives chapter? -Adam

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