- mpiwg-p2p - mailman3.cels.anl.gov

Re: [mpiwg-p2p] Next meeting: 12th May 2014 11am Central US
by Daniel Holmes 18 May '14

18 May '14

Hi all, I created a Google presentation with slides for the MPI Stream feedback request: https://docs.google.com/presentation/d/1-ic9IOcBtIIJl76L4MNlQpZjYjoAwBLH9j8… This is the first time I've used Google presentation so hopefully that link is accessible and gives you all edit access. Let me know if it doesn't work! Cheers, Dan. On 09/05/2014 15:28, Daniel Holmes wrote: > Hi all, > > The next point-to-point teleconference will be on Monday 12th May 2014 > at 11am Central US via webex. > > Connection details are on the p2p wiki. > > Agenda: > 1) Streams - time during the meeting in June has been requested so the > WG can ask for feedback on our initial ideas/questions. We now need a > few slides! > 2) Receive_reduce - are we bringing this to the forum in June? > 3) Arecv - are we bringing this to the forum in June? > 4) AOB (= any other business) - do we need additional WG time at the > meeting in June? > > Cheers, > Dan. > -- Dan Holmes Applications Consultant in HPC Research EPCC, The University of Edinburgh James Clerk Maxwell Building The Kings Buildings Mayfield Road Edinburgh, UK EH9 3JZ T: +44(0)131 651 3465 E: dholmes(a)epcc.ed.ac.uk *Please consider the environment before printing this email.* The University of Edinburgh is a charitable body, registered in Scotland, with registration number SC005336.

1 0

Next meeting: 12th May 2014 11am Central US
by Daniel Holmes 09 May '14

09 May '14

Hi all, The next point-to-point teleconference will be on Monday 12th May 2014 at 11am Central US via webex. Connection details are on the p2p wiki. Agenda: 1) Streams - time during the meeting in June has been requested so the WG can ask for feedback on our initial ideas/questions. We now need a few slides! 2) Receive_reduce - are we bringing this to the forum in June? 3) Arecv - are we bringing this to the forum in June? 4) AOB (= any other business) - do we need additional WG time at the meeting in June? Cheers, Dan. -- Dan Holmes Applications Consultant in HPC Research EPCC, The University of Edinburgh James Clerk Maxwell Building The Kings Buildings Mayfield Road Edinburgh, UK EH9 3JZ T: +44(0)131 651 3465 E: dholmes(a)epcc.ed.ac.uk *Please consider the environment before printing this email.* The University of Edinburgh is a charitable body, registered in Scotland, with registration number SC005336.

1 0

Re: [mpiwg-p2p] Next meeting: 28th April 2014 11am Central US
by Daniel Holmes 09 May '14

09 May '14

Hi all, The next point-to-point teleconference will be on Monday 12th May 2014 at 11am Central US via webex. Connection details are on the p2p wiki. Agenda: 1) Streams - time during the meeting in June has been requested so the WG can ask for feedback on our initial ideas/questions. We now need a few slides! 2) Receive_reduce - are we bringing this to the forum in June? 3) Arecv - are we bringing this to the forum in June? 4) AOB (= any other business) - do we need additional WG time at the meeting in June? Cheers, Dan. -- Dan Holmes Applications Consultant in HPC Research EPCC, The University of Edinburgh James Clerk Maxwell Building The Kings Buildings Mayfield Road Edinburgh, UK EH9 3JZ T: +44(0)131 651 3465 E: dholmes(a)epcc.ed.ac.uk *Please consider the environment before printing this email.* The University of Edinburgh is a charitable body, registered in Scotland, with registration number SC005336.

1 0

Re: [mpiwg-p2p] Next meeting: 28th April 2014 11am Central US
by Jeff Hammond 28 Apr '14

28 Apr '14

I updated https://svn.mpi-forum.org/trac/mpi-forum-web/ticket/407 I have overlapping telecons so I might have to exit early. Jeff On Fri, Apr 25, 2014 at 11:14 AM, Daniel Holmes <dholmes(a)epcc.ed.ac.uk> wrote: > Hi all, > > The next point-to-point teleconference will be on Monday 28th April 2014 at > 11am Central US via webex. > > Connection details are on the p2p wiki. > > Agenda: > 1) Streams > 2) Arecv > 3) Receive_reduce > 4) AOB (= any other business) > > Cheers, > Dan. > > -- > Dan Holmes > Applications Consultant in HPC Research > EPCC, The University of Edinburgh > James Clerk Maxwell Building > The Kings Buildings > Mayfield Road > Edinburgh, UK > EH9 3JZ > T: +44(0)131 651 3465 > E: dholmes(a)epcc.ed.ac.uk > > *Please consider the environment before printing this email.* > > > The University of Edinburgh is a charitable body, registered in > Scotland, with registration number SC005336. > > _______________________________________________ > mpiwg-p2p mailing list > mpiwg-p2p(a)lists.mpi-forum.org > http://lists.mpi-forum.org/mailman/listinfo.cgi/mpiwg-p2p -- Jeff Hammond jeff.science(a)gmail.com

1 0

Next meeting: 28th April 2014 11am Central US
by Daniel Holmes 25 Apr '14

25 Apr '14

Hi all, The next point-to-point teleconference will be on Monday 28th April 2014 at 11am Central US via webex. Connection details are on the p2p wiki. Agenda: 1) Streams 2) Arecv 3) Receive_reduce 4) AOB (= any other business) Cheers, Dan. -- Dan Holmes Applications Consultant in HPC Research EPCC, The University of Edinburgh James Clerk Maxwell Building The Kings Buildings Mayfield Road Edinburgh, UK EH9 3JZ T: +44(0)131 651 3465 E: dholmes(a)epcc.ed.ac.uk *Please consider the environment before printing this email.* The University of Edinburgh is a charitable body, registered in Scotland, with registration number SC005336.

1 0

Re: [mpiwg-p2p] Next meeting: 14th April 2014 11am Central US
by Kenneth Raffenetti 14 Apr '14

14 Apr '14

Is anyone else having trouble connecting to the meeting? I've tried multiple machines here at ANL. On 04/13/2014 05:24 AM, Daniel Holmes wrote: > Hi all, > > The next point-to-point teleconference will be on Monday 14th April 2014 > at 11am Central US via webex. > > Connection details are on the p2p wiki. > > Agenda: > 1) Streams: I have some notes - see below - from a discussion last week > with Bill Gropp, Torsten (et al from the EPiGRAM project) > 2) Receive_reduce > 3) Arecv > 4) AOB (= any other business) > > Cheers, > Dan. > > Streams > ======= > QCDOC developers want persistent channel semantics; actually use > one-sided, multi-value variables > Breaking message boundaries enables pipe-lining - makes it fundamentally > different to RMA? > Libraries exist to do this - what are they? > Streaming is well defined in OpenSPL > Papers from the MPI-2 era (about RMA) suggest writing papers on this and > getting feedback > Reach out to other communities, e.g. SKA - Square Kilometre Array > Should this be added to MPI or added as a library on top - does this > need small enabling changes > Bill suggests we craft a broad-visibility paper > Affects the discussion on Arecv, which would be handled by streams? > Getting MPI to manage/allocate memory (as in Arecv) is dangerous and bad > > Flow-control > ============ > May just be remote notification and a sequence of messages that remove > the need for local notification - reduces protocol messages (from 3 to 1 > per message) > Integral part of streaming - turns global flow-control problem into > local buffer management > May address load-imbalance? Hmm >

1 0

Re: [mpiwg-p2p] Next meeting: 14th April 2014 11am Central US
by Jeff Hammond 13 Apr '14

13 Apr '14

I cannot attend. My trac acct is fixed though. Will upload material for discussion by others. Jeff Sent from my iPhone > On Apr 13, 2014, at 5:24 AM, Daniel Holmes <dholmes(a)epcc.ed.ac.uk> wrote: > > Hi all, > > The next point-to-point teleconference will be on Monday 14th April 2014 at 11am Central US via webex. > > Connection details are on the p2p wiki. > > Agenda: > 1) Streams: I have some notes - see below - from a discussion last week with Bill Gropp, Torsten (et al from the EPiGRAM project) > 2) Receive_reduce > 3) Arecv > 4) AOB (= any other business) > > Cheers, > Dan. > > Streams > ======= > QCDOC developers want persistent channel semantics; actually use one-sided, multi-value variables > Breaking message boundaries enables pipe-lining - makes it fundamentally different to RMA? > Libraries exist to do this - what are they? > Streaming is well defined in OpenSPL > Papers from the MPI-2 era (about RMA) suggest writing papers on this and getting feedback > Reach out to other communities, e.g. SKA - Square Kilometre Array > Should this be added to MPI or added as a library on top - does this need small enabling changes > Bill suggests we craft a broad-visibility paper > Affects the discussion on Arecv, which would be handled by streams? > Getting MPI to manage/allocate memory (as in Arecv) is dangerous and bad > > Flow-control > ============ > May just be remote notification and a sequence of messages that remove the need for local notification - reduces protocol messages (from 3 to 1 per message) > Integral part of streaming - turns global flow-control problem into local buffer management > May address load-imbalance? Hmm > > -- > Dan Holmes > Applications Consultant in HPC Research > EPCC, The University of Edinburgh > James Clerk Maxwell Building > The Kings Buildings > Mayfield Road > Edinburgh, UK > EH9 3JZ > T: +44(0)131 651 3465 > E: dholmes(a)epcc.ed.ac.uk > > *Please consider the environment before printing this email.* > > > The University of Edinburgh is a charitable body, registered in > Scotland, with registration number SC005336. > > _______________________________________________ > mpiwg-p2p mailing list > mpiwg-p2p(a)lists.mpi-forum.org > http://lists.mpi-forum.org/mailman/listinfo.cgi/mpiwg-p2p

1 0

Next meeting: 14th April 2014 11am Central US
by Daniel Holmes 13 Apr '14

13 Apr '14

Hi all, The next point-to-point teleconference will be on Monday 14th April 2014 at 11am Central US via webex. Connection details are on the p2p wiki. Agenda: 1) Streams: I have some notes - see below - from a discussion last week with Bill Gropp, Torsten (et al from the EPiGRAM project) 2) Receive_reduce 3) Arecv 4) AOB (= any other business) Cheers, Dan. Streams ======= QCDOC developers want persistent channel semantics; actually use one-sided, multi-value variables Breaking message boundaries enables pipe-lining - makes it fundamentally different to RMA? Libraries exist to do this - what are they? Streaming is well defined in OpenSPL Papers from the MPI-2 era (about RMA) suggest writing papers on this and getting feedback Reach out to other communities, e.g. SKA - Square Kilometre Array Should this be added to MPI or added as a library on top - does this need small enabling changes Bill suggests we craft a broad-visibility paper Affects the discussion on Arecv, which would be handled by streams? Getting MPI to manage/allocate memory (as in Arecv) is dangerous and bad Flow-control ============ May just be remote notification and a sequence of messages that remove the need for local notification - reduces protocol messages (from 3 to 1 per message) Integral part of streaming - turns global flow-control problem into local buffer management May address load-imbalance? Hmm -- Dan Holmes Applications Consultant in HPC Research EPCC, The University of Edinburgh James Clerk Maxwell Building The Kings Buildings Mayfield Road Edinburgh, UK EH9 3JZ T: +44(0)131 651 3465 E: dholmes(a)epcc.ed.ac.uk *Please consider the environment before printing this email.* The University of Edinburgh is a charitable body, registered in Scotland, with registration number SC005336.

1 0

Re: [mpiwg-p2p] [EXTERNAL] Re: Next meeting: 31st March 2014 11am Central US
by Grant, Ryan Eric (-EXP) 31 Mar '14

31 Mar '14

Hi Dan, The meeting did take place and we had a brief discussion. I took some notes so I'll post them on the wiki. --Ryan ======================== PostDoctoral Appointee Scalable System Software Sandia National Laboratories Albuquerque, NM On 3/31/14 10:20 AM, "Daniel Holmes" <dholmes(a)epcc.ed.ac.uk> wrote: >I apologise for not joining this meeting. I am attending an all-hands >meeting in Stockholm for one of the European projects. The >teleconference was scheduled at a time that fitted a gap in the meeting >schedule. However, with delays and re-scheduling it turned out that I >was actually presenting my talk at the time of the teleconference! > >Did the teleconference take place without me? Did anyone take notes? If >so, please post them to the wiki page. If not, can someone summarise the >discussion(s) for me? > >Jeff - I have not yet tried to add content to a ticket in the MPI trac >system but, if your authorisation issues persist, send me the content >and I'll add it on your behalf. > >Cheers, >Dan. > >On 31/03/2014 16:32, Jeff Hammond wrote: >> For some strange reason, I am now locked out of >> https://svn.mpi-forum.org/trac/ and thus cannot add my material to the >> ticket. I am trying to reset my password but so far it is not >> working. >> >> In the event that I can contribute to the ticket at some point in the >> near future, I will. >> >> Jeff >> >> On Fri, Mar 28, 2014 at 8:24 AM, Daniel Holmes <dholmes(a)epcc.ed.ac.uk> >>wrote: >>> Hi all, >>> >>> The next point-to-point teleconference will be on Monday 31st March >>>2014 at >>> 11am Central US via webex. >>> >>> Connection details are on the p2p wiki. >>> >>> Agenda: >>> 1) Receive_reduce >>> 2) Streams >>> 3) Arecv >>> 4) AOB (= any other business) >>> >>> >>> Cheers, >>> Dan. >>> >>> -- >>> Dan Holmes >>> Applications Consultant in HPC Research >>> EPCC, The University of Edinburgh >>> James Clerk Maxwell Building >>> The Kings Buildings >>> Mayfield Road >>> Edinburgh, UK >>> EH9 3JZ >>> T: +44(0)131 651 3465 >>> E: dholmes(a)epcc.ed.ac.uk >>> >>> *Please consider the environment before printing this email.* >>> >>> >>> The University of Edinburgh is a charitable body, registered in >>> Scotland, with registration number SC005336. >>> >>> _______________________________________________ >>> mpiwg-p2p mailing list >>> mpiwg-p2p(a)lists.mpi-forum.org >>> http://lists.mpi-forum.org/mailman/listinfo.cgi/mpiwg-p2p >> >> > >-- >Dan Holmes >Applications Consultant in HPC Research >EPCC, The University of Edinburgh >James Clerk Maxwell Building >The Kings Buildings >Mayfield Road >Edinburgh, UK >EH9 3JZ >T: +44(0)131 651 3465 >E: dholmes(a)epcc.ed.ac.uk > >*Please consider the environment before printing this email.* > > >The University of Edinburgh is a charitable body, registered in >Scotland, with registration number SC005336. > >_______________________________________________ >mpiwg-p2p mailing list >mpiwg-p2p(a)lists.mpi-forum.org >http://lists.mpi-forum.org/mailman/listinfo.cgi/mpiwg-p2p

1 0

Re: [mpiwg-p2p] Next meeting: 31st March 2014 11am Central US
by Daniel Holmes 31 Mar '14

31 Mar '14

I apologise for not joining this meeting. I am attending an all-hands meeting in Stockholm for one of the European projects. The teleconference was scheduled at a time that fitted a gap in the meeting schedule. However, with delays and re-scheduling it turned out that I was actually presenting my talk at the time of the teleconference! Did the teleconference take place without me? Did anyone take notes? If so, please post them to the wiki page. If not, can someone summarise the discussion(s) for me? Jeff - I have not yet tried to add content to a ticket in the MPI trac system but, if your authorisation issues persist, send me the content and I'll add it on your behalf. Cheers, Dan. On 31/03/2014 16:32, Jeff Hammond wrote: > For some strange reason, I am now locked out of > https://svn.mpi-forum.org/trac/ and thus cannot add my material to the > ticket. I am trying to reset my password but so far it is not > working. > > In the event that I can contribute to the ticket at some point in the > near future, I will. > > Jeff > > On Fri, Mar 28, 2014 at 8:24 AM, Daniel Holmes <dholmes(a)epcc.ed.ac.uk> wrote: >> Hi all, >> >> The next point-to-point teleconference will be on Monday 31st March 2014 at >> 11am Central US via webex. >> >> Connection details are on the p2p wiki. >> >> Agenda: >> 1) Receive_reduce >> 2) Streams >> 3) Arecv >> 4) AOB (= any other business) >> >> >> Cheers, >> Dan. >> >> -- >> Dan Holmes >> Applications Consultant in HPC Research >> EPCC, The University of Edinburgh >> James Clerk Maxwell Building >> The Kings Buildings >> Mayfield Road >> Edinburgh, UK >> EH9 3JZ >> T: +44(0)131 651 3465 >> E: dholmes(a)epcc.ed.ac.uk >> >> *Please consider the environment before printing this email.* >> >> >> The University of Edinburgh is a charitable body, registered in >> Scotland, with registration number SC005336. >> >> _______________________________________________ >> mpiwg-p2p mailing list >> mpiwg-p2p(a)lists.mpi-forum.org >> http://lists.mpi-forum.org/mailman/listinfo.cgi/mpiwg-p2p > > -- Dan Holmes Applications Consultant in HPC Research EPCC, The University of Edinburgh James Clerk Maxwell Building The Kings Buildings Mayfield Road Edinburgh, UK EH9 3JZ T: +44(0)131 651 3465 E: dholmes(a)epcc.ed.ac.uk *Please consider the environment before printing this email.* The University of Edinburgh is a charitable body, registered in Scotland, with registration number SC005336.

1 0