[Openmp-dev] OpenMP in LLVM Multi-company Telecom Meeting Minutes April 08th

Narayanaswamy, Ravi via Openmp-dev openmp-dev at lists.llvm.org
Wed Apr 8 12:56:51 PDT 2020


Next Meeting :  April 22nd

Opens:

  *   Johannes requested developers to participate in reviews to make code robust.
  *   stream pool

  *   Shilei has posted support for fixing the correctness of device synchronization with streams here https://reviews.llvm.org/D77412

  *   Async support in target library
     *   To support async,  the current _tgt_ API for plugin was changed to add an additional argument. https://reviews.llvm.org/D77005

       We had agreed previous any exposed API should not change but new APIs will be added and the old API can internally call the new  API

  *   AMD plugin
     *   Nice if AMD plugin can be committed to llvm.org.  This will enable testing the rewrite of device rtl into common/device specific partition
     *   Greg said they are working on upstreaming the code.  This code is currently available for all to access in their github
  *   NEC SX-Aurora plugin
     *   New plugin for NEC SX-Aurora is being developed.  Can be found here https://reviews.llvm.org/D76843
  *   The activity of partitioning device rtl was on hold as Ron was spending quality time as proud dad.  Congratulations.
     *   Cuda requirement has been removed
     *   Shared data is supported using declare target and device code using target pragmas.



Development Activity:-

  *   Unshackled threads
     *   Shilei presented the design of a prototype to add unshackled threads in openmp runtime to support async target tasks. The presentation is attached

        There are still issue with how to synchronize with other task and with task wait.

         Alex mentioned we already have support for detach task for use with target task.

         We need to create examples and check if they are handled in both the schemes. (unshackled or existing implementation)

  *   Fat Static Library
     *   George has uploaded the support in offload bundler here https://reviews.llvm.org/D74262
     *   He will be uploading the driver changes.
  *   math support in target regions
     *   Support has been added.
  *   omp loop, omp metadirective, omp interop
     *   Johannes has prototypes implemented omp loop and metadirectives
     *   Was asking if anyone want to participate in omp interop.
  *   Declare variants
     *   Johannes has implemented support for begin/end declare variants.

Roll Call :

Company

Attendees

8-Jan

29-Jan

12-Feb

26-Feb

11-Mar

25-Mar

8-Apr

AMD



















Greg Rodgers



x









x



Ashwin Aji

















Jan Sjodin



x













Ron Lieberman



x









x



sameer Sahasrabuddhe

















Jonathan Chesterfield

x

x

x

x

x

x





Andrey Kasaurov















ANL

Hal Finkel











x

x



Michael Kruse





x

x

x

x

x



Johannes Doerfert

x

x

x







x



Ye Luo













x

ARM

Andrzej Warzynski



x













Francesco Petrogalli



x

x

x



x



IBM

Alexandre Eichenberger

















Carlo Bertolli

















Kelvin Li

x





x

x







Doru

















Alexey Bataev

x

x

x

x

x

x

x

Intel

Andrey Churbanov











x

x



Ravi Narayanaswamy

x

x

x

x

x

x

x



Serguei Dmitriev

















Rajiv Deodhar

















Lorri Menard

















Terry Wilmarth

















Rao, Prem

















Hansang Bae

















Xinmin Tian

















Sirram Aananthakrishnan





x

x









Jeff Hammond











x





George Rokos

x

x

x

x

x

x

x



Alex Duran













x



Micheal Klemm







x







HPE

Deepak Eachempati



x

x

x



x

x

Micron

John Leidel















Nvidia

James Beyer















ORNL

Graham Lopez

















Joel Denny



x



x

x

x

x



Geoffroy Vallee

















Fady Ghanim

x

x

x

x

x







Oscar Hernandez















SBU/BNL

Lingda Li





x











Jose Monlsave

















Vivek Kale



x













Shilei Tian













x

TU Darmstadt

Lukas Sommer

x



x

x





x

BrookHavens

Abid Malik

x













Universidata EAFIT Colombia

Hamilton Tobon Mosquera













x



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