February 2019 - mpi-forum - mailman3.cels.anl.gov

Request for Reading: Clarify alignment of memory provided to applications
by Joseph Schuchart 18 Feb '19

18 Feb '19

Dear MPI forum members, [Apologies for double-posting, I did not receive a notification for my previous mail and it does not show up in the archives] I would like to request a reading of the changes proposed in issue #121 "Clarify alignment of memory provided to applications": https://github.com/mpi-forum/mpi-issues/issues/121. The changes to the standard text are detailed in PR #96 and include a requirement for proper alignment suitable for load/store accesses of predefined MPI types and adds a new info key to allow users to request bigger alignments: https://github.com/mpi-forum/mpi-standard/pull/96/files. A PDF file with the proposed changes highlighted can be found here: https://github.com/mpi-forum/mpi-issues/files/2874936/mpi-report.pdf This issue has been discussed in the RMA-WG before and I would like to propose this for MPI 4.0. I am not familiar with the internal processes of the MPI forum so please let me know if there are any issues with this request. Many thanks in advance, Joseph Schuchart -- Dipl.-Inf. Joseph Schuchart High Performance Computing Center Stuttgart (HLRS) Nobelstr. 19 D-70569 Stuttgart Tel.: +49(0)711-68565890 Fax: +49(0)711-6856832 E-Mail: schuchart(a)hlrs.de

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MPI Proposal: MPI_Cart_weighted_create / Topology aware Cartesian communicators - issue #120, PR #98
by Christoph Niethammer 18 Feb '19

18 Feb '19

Dear MPI Forum, With this proposal we want to address the current problem of not using hardware and application topology information for communication performance optimization. Therefore we propose some new API functions to the existing MPI Topology interface. Details of the problem can be found in issue #120 and related material therein: https://github.com/mpi-forum/mpi-issues/issues/120 The proposed changes in the standard are part of pull request #98: https://github.com/mpi-forum/mpi-standard/pull/98 An annotated pdf showing the changes in the document is available under https://github.com/mpi-forum/mpi-issues/files/2875356/mpi32-report-topol-20… Best regards Christoph Niethammer and Rolf Rabenseifner -- Christoph Niethammer High Performance Computing Center Stuttgart (HLRS) Nobelstrasse 19 70569 Stuttgart Tel: ++49(0)711-685-87203 email: niethammer(a)hlrs.de http://www.hlrs.de/people/niethammer

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Fwd: FINAL REMINDER: Call for items for March Forum meetings
by Rolf Rabenseifner 18 Feb '19

18 Feb '19

Puri asked me to send his email again to the MPI Forum, because soemthing didn't worked with the sending out yesterday. ________________________________ From: Bangalore, Purushotham Sent: Sunday, February 17, 2019 10:22 PM To: Main MPI Forum mailing list Cc: Martin Schulz Subject: Re: [Mpi-forum] FINAL REMINDER: Call for items for March Forum meetings Hi All, We would like to do the first reading on the updates to the Semantic Terms section. Please find the corresponding issue and PR info: Issue: https://github.com/mpi-forum/mpi-issues/issues/96 PR: https://github.com/mpi-forum/mpi-standard/pull/97 You can find the corresponding complete PDF file of the standard at the issue or at https://github.com/mpi-forum/mpi-issues/files/2874029/mpi32-report.pdf. I have attached the PDF files that Rolf created which summarize these changes along with the appendix. Thanks, Puri ________________________________ From: mpi-forum <mpi-forum-bounces(a)lists.mpi-forum.org> on behalf of Martin Schulz via mpi-forum <mpi-forum(a)lists.mpi-forum.org> Sent: Sunday, February 17, 2019 6:03 AM To: mpi-forum(a)lists.mpi-forum.org Cc: Martin Schulz Subject: [Mpi-forum] FINAL REMINDER: Call for items for March Forum meetings Hi all, As a reminder: tomorrow (Monday) is the deadline for the announcements of reading and ballots for the MPI forum meeting in Chattanooga. Please send any announcements, together with the PR number and a reference to the matching PDF to the MPI forum list. If there other agenda items aside from readings, please send them to me as well so I can add them to the agenda. Thanks! Martin Sent from my iPad _______________________________________________ mpi-forum mailing list mpi-forum(a)lists.mpi-forum.org https://lists.mpi-forum.org/mailman/listinfo/mpi-forum -- 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: Room 1.307) .

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Re: [Mpi-forum] FINAL REMINDER: Call for items for March Forum meetings
by Aurelien Bouteiller 17 Feb '19

17 Feb '19

Dear all, we have prepared the issue #102 for reading at the March Meeting 2019. This proposal defines clearly what should happen when a failure occurs during and before `MPI_INIT`, and during and after `MPI_FINALIZE`. The behavior can be controlled by setting a launch info key (`mpi_initial_errhandler`) during `MPI_COMM_SPAWN` or `mpiexec`. https://github.com/mpi-forum/mpi-issues/issues/102 <https://github.com/mpi-forum/mpi-issues/issues/102> The following pull request contains the links to all the review material: https://github.com/mpi-forum/mpi-standard/pull/50 <https://github.com/mpi-forum/mpi-standard/pull/50> LatexDiff (w/o the general index): https://github.com/mpi-forum/mpi-standard/files/2873955/201903-mpi32-diff-i… <https://github.com/mpi-forum/mpi-standard/files/2873955/201903-mpi32-diff-i…> Fulltext: https://github.com/mpi-forum/mpi-standard/files/2873965/201903-mpi32-report… <https://github.com/mpi-forum/mpi-standard/files/2873965/201903-mpi32-report…> The current version of that proposal integrates the ideas that were discussed last december at the Forum Meeting and also relates (but is independent from) the effort of using MPI_Info before MPI_INIT. Best Regards, Aurelien -- Aurelien Bouteiller, Ph.D. Innovative Computing Laboratory; The University of Tennessee Claxton Suite 309; 1122 Volunteer Blvd.; 37996, Knoxville, TN, USA +1 865 974 9375 (p); +1 865 974 8296 (f); Claxton 309 (f2f) > On Feb 17, 2019, at 07:03, Martin Schulz via mpi-forum <mpi-forum(a)lists.mpi-forum.org> wrote: > > Hi all, > > As a reminder: tomorrow (Monday) is the deadline for the announcements of reading and ballots for the MPI forum meeting in Chattanooga. Please send any announcements, together with the PR number and a reference to the matching PDF to the MPI forum list. > > If there other agenda items aside from readings, please send them to me as well so I can add them to the agenda. > > Thanks! > > Martin > > > > Sent from my iPad > _______________________________________________ > mpi-forum mailing list > mpi-forum(a)lists.mpi-forum.org > https://lists.mpi-forum.org/mailman/listinfo/mpi-forum

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Re: [Mpi-forum] FINAL REMINDER: Call for items for March Forum meetings
by Rolf Rabenseifner 17 Feb '19

17 Feb '19

Dear all, we have prepared the issue #120 MPI_Cart_weighted_create / Topology aware Cartesian communicators https://github.com/mpi-forum/mpi-issues/issues/120 for reading at March Meeting 2019. For a full pdf of the proposal with changebars, see https://github.com/mpi-forum/mpi-issues/files/2873312/topol-2019-02-17_20.0… We hope that we also get the pull request ready tommorrow, but best readable is the pdf above. A portable and complete implementation together with documentation can be found on the issue and also on our EuroMPI 2018 directory: https://fs.hlrs.de/projects/par/mpi/EuroMPI2018-Cartesian/ we presented and discussed this topic (with you) already at the Barcelona Meeting Sep 2018. Best regards Rolf, Christoph and Claudia ----- Original Message ----- > From: "Main MPI Forum mailing list" <mpi-forum(a)lists.mpi-forum.org> > To: "Main MPI Forum mailing list" <mpi-forum(a)lists.mpi-forum.org> > Cc: "Martin Schulz" <schulzm(a)in.tum.de> > Sent: Sunday, February 17, 2019 1:03:20 PM > Subject: [Mpi-forum] FINAL REMINDER: Call for items for March Forum meetings > Hi all, > > As a reminder: tomorrow (Monday) is the deadline for the announcements of > reading and ballots for the MPI forum meeting in Chattanooga. Please send any > announcements, together with the PR number and a reference to the matching PDF > to the MPI forum list. > > If there other agenda items aside from readings, please send them to me as well > so I can add them to the agenda. > > Thanks! > > Martin > > > > Sent from my iPad > _______________________________________________ > mpi-forum mailing list > mpi-forum(a)lists.mpi-forum.org > https://lists.mpi-forum.org/mailman/listinfo/mpi-forum -- 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: Room 1.307) .

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FINAL REMINDER: Call for items for March Forum meetings
by Martin Schulz 17 Feb '19

17 Feb '19

Hi all, As a reminder: tomorrow (Monday) is the deadline for the announcements of reading and ballots for the MPI forum meeting in Chattanooga. Please send any announcements, together with the PR number and a reference to the matching PDF to the MPI forum list. If there other agenda items aside from readings, please send them to me as well so I can add them to the agenda. Thanks! Martin Sent from my iPad

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[Request for Cooperation] -- MPI International Survey
by Atsushi HORI 16 Feb '19

16 Feb '19

Dear MPI Forum members, As part of a wide-ranging effort to understand the current usage of the Message Passing Interface (MPI) in the development of parallel applications and to drive future additions to the MPI standard, an international team is seeking feedback from the largest possible MPI audience (past, current, and potential users on the globe) to obtain a better understanding of their needs and to understand the impact of different MPI capabilities on the development of distributed applications. To obtain representative samples of the MPI community, we have prepared a survey https://docs.google.com/forms/d/e/1FAIpQLSd1bDppVODc8nB0BjIXdqSCO_MuEuNAAbB… that specifically targets all potential MPI users, including those in the public, education, research and engineering domains--from undergraduate and graduate students and postdocs to seasoned researchers and engineers. The information gathered will be used to publish a comprehensive report of the different use cases and potential areas of opportunity. These results will be made freely available, and the raw data, the scripts to manipulate it, as well as the resulting analysis will be, in time, posted on github [1], while the curated results will be available via github pages [2]. For anyone interested in participating in the survey, we sincerely appreciate your feedback. The survey is rather short (about 30 easy questions), and should not take more than 15 minutes to complete. In addition to your participation, we would appreciate if you re-distribute this e-mail to your domestic/local communities. Important Date -- This survey will be closed by the end of February 2019. Questions? -- Please send any queries about this MPI survey to ahori(a)riken.jp Thank you on behalf of the International MPI Survey, George Bosilca (UT/ICL) Geoffroy Vallee (ORNL) Emmanuel Jeannot (Inria) Atsushi Hori (RIKEN) Takahiro Ogura (RIKEN) [1] https://github.com/bosilca/MPIsurvey/ [2] https://bosilca.github.io/MPIsurvey/ ----- Atsushi HORI ahori(a)riken.jp https://www.sys.r-ccs.riken.jp

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Call for Papers: EuroMPI 2019, Zürich, Switzerland
by Martin Schulz 11 Feb '19

11 Feb '19

EuroMPI 2019 Zuerich, Switzerland, September 10-13, 2019 Deadline: April 15th, 2019 Call for Papers =============== EuroMPI 2019 will continue to focus on not just MPI, but also extensions or alternative interfaces for high-performance homogeneous/heterogeneous/hybrid systems, benchmarks, tools, parallel I/O, fault tolerance, and parallel applications using MPI and other interfaces. Through the presentation of contributed papers, posters and invited talks, the meeting will provide ample opportunities for attendees to interact and share ideas and experiences to contribute to the improvement and furthering of message-passing and related parallel programming paradigms. We invite high-quality, full paper submissions on all topics related to message-passing parallel programming with MPI and related or competing models. Topics of interest include, but are not limited to: * Implementation Issues and Algorithms: Efficient and scalable implementations of message-passing constructs. * Architectures and systems, Towards exascale computing, Efficient use of accelerators and other features of modern, large-scale systems, Hardware-software interaction. * Programming models and paradigms for large-scale, parallel, distributed memory systems, hiearchical and hybrid models, partitioned global address space (PGAS) models. * Extensions to and shortcomings of MPI, alternative interfaces and solutions. * New, parallel (MPI-)I/O mechanisms optimizations. * Hybrid and heterogeneous programming with MPI and other interfaces. * Message passing interface support for data-intensive parallel applications. * Fault tolerance in message-passing implementations and systems. * MPI parallel programming in clouds and non-dedicated systems. * Applications and Performance: Performance evaluation for MPI and MPI-based applications * Automatic performance tuning of applications and implementations. * Verification of message-passing applications and protocols. * Applications using message passing, in particular in computational science and scientific computing. * Parallel algorithms in the message-passing paradigm. Papers accepted for presentation as full papers will be published by ACM and appear in separate proceedings the ACM Digital Library. We also invite submissions of short papers on the same topics that are suitable for poster presentation at the conference. Papers that are not accepted for presentation as full papers may be recommended for poster presentation. Poster papers will be published informally but are not intended to appear in the regular ACM Digital Library proceedings. Papers will be reviewed for quality, originality, clarity, correctness, technical strength, and relevance to the topics of the meeting. Each paper will receive at least 3 reviews from members of the program committee. Reviews are blind (but not double-blind), the names of the authors will be seen by the program committee. Among the papers selected for presentation, a few of the best papers will, as has been the tradition for the last couple of years, be selected by the programme comittee and recommended for publication in a EuroMPI 2019 Special Issue of the Parallel Computing journal, see https://www.journals.elsevier.com/parallel-computing/. These papers will go through a separate round of reviews, and are intended as extended, more polished archival versions of the conference versions. Important Dates =============== Submission server opens: January 14th, 2019 Full paper Submission: April 15th, 2019 (AOE) Notification: July 1st, 2019 Camera-ready: August 5th, 2019 Conference dates: September 11th-13th, 2019 See http://eurompi19.inf.ethz.ch/call for updates. Submission Guidelines ===================== To be considered, papers must be formatted according to the "sigconf" style in the ACM 2017 Template and up to 10 pages in length (shorter papers are welcome) in pdf-format. The recommended length of poster papers is two pages. Submissions (regular papers and posters) will be handled via easychair. The page limit includes figures, tables, and appendices, but does not include references, for which there is no page limit. Margins and font sizes should not be modified. Authors should submit their work through the Euro MPI 2019 Submission Site at easychair: https://easychair.org/conferences/?conf=eurompi2019. Accepted papers will be published in the conference proceedings by ACM-ICPS. Sent from my iPad

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MPI Virtual Meeting on 2/6 cancelled/moved
by Martin Schulz 05 Feb '19

05 Feb '19

Hi all, The planned MPI virtual forum meeting on 2/6 on the idea of a function paper API is cancelled. We will pick up the topic in a separate, additional virtual meeting on 2/20. The virtual meeting on 2/13 on Resilience Fundamentals will happen as planned. Thanks, Martin — Prof. Dr. Martin Schulz, Chair of Computer Architecture and Parallel Systems Department of Informatics, TU-Munich, Boltzmannstraße 3, D-85748 Garching Email: schulzm(a)in.tum.de

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MPI Forum March 2019 / Topics and Registration
by Martin Schulz 03 Feb '19

03 Feb '19

Hi all, The March MPI forum is getting closer and I hope that many of you will make it. The registration is open at: https://www.mpi-forum.org/meetings/2019/03/logistics <https://www.mpi-forum.org/meetings/2019/03/logistics> Please register as soon as possible, to make logistics easier. Note, we had to charge $200 this time, but there will also be some lunch on Thursday due to the other events. As you have seen in the previous emails, the format is a bit different this time: in order to make progress with the various large topics, we are skipping working groups this time and going for plenaries only. We ran out of time the last few meetings and that is blocking our progress on MPI-4. I also would like to look at the state of things at the end of the meeting and have a discussion on the timeline. To help with this, I have the following requests: - Please let me know, whether you have any topics for the plenary as soon as possible. - If you are proposing a reading, it would be great to aim at publishing it before the 2 week deadline (1-2 earlier would be great), to allow for early comments (I know, this won’t be possible in all cases, but it would be nice if it would work for some). - Please look at the proposed text before the meeting and, in case it is posted before the 2 week mark, try to send comments before the deadline to allow for updates. Also, if you still would like WG time outside the forum times, let me and Tony know and we will see what can be done. Finally, consider attending the attached events and plan your travel accordingly. More information on this is on our agenda page: https://www.mpi-forum.org/meetings/2019/03/agenda <https://www.mpi-forum.org/meetings/2019/03/agenda> Thanks! Martin — Prof. Dr. Martin Schulz, Chair of Computer Architecture and Parallel Systems Department of Informatics, TU-Munich, Boltzmannstraße 3, D-85748 Garching Email: schulzm(a)in.tum.de

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