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UPC at LBNL/U.C. Berkeley Overview

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Title: Ernest Orlando Lawrence Berkeley National Laboratory Subject: Berkeley Lab Generic Presentation Author: Gabor Torok Keywords: Presentation Generic – PowerPoint PPT presentation

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Title: UPC at LBNL/U.C. Berkeley Overview


1
UPC at LBNL/U.C. BerkeleyOverview
  • Kathy Yelick
  • LBNL and U.C. Berkeley

2
UPC Team at Berkeley
  • Christian Bell Myrinet conduit (away at school,
    returning in the Fall)
  • Dan Bonachea GASNet spec, MPI and Quadrics
  • Wei Chen UPC/Open54 compiler
  • Jason Duell Quadrics communication and UPC
    runtime layer implementation
  • Paul Hargrove VIA, Infiniband, etc.
  • Parry Husbands UPC Applications
  • Costin Iancu UPC/Open64 compiler
  • Mike Welcome IBM/SP communication, moving into
    applications
  • Kathy Yelick PI

3
Overview of UPC Effort
  • Three components
  • Compiler
  • Portable compiler infrastructure (UPC-gtC)
  • Explore optimizations communication, shared
    pointers
  • Transfer technology to other UPC compilers
  • E.g., the HP compiler
  • Communication support for GAS languages
  • Performance evaluation influence machine vendors
  • Tech transfer to ARMCI
  • Applications and benchmarks
  • Started with NAS PB (MG and CG)
  • Mesh generation application this year

4
Progress this Year
  • The compiler is running!
  • Not gcc 2.9.6 dependent (mostly)
  • Backend changes for C code generator
  • GASNet implementations on Quadrics, Myrinet, and
    LAPI
  • New NAS applications
  • NAS-compliant CG
  • MG done previously
  • New mesh generation application
  • Papers
  • Network performance
  • Compiler evaluation
  • GASNet on Myrinet
  • Optimizations (underway)

5
Agenda
  • Agenda
  • 1230 Overview -- Kathy Yelick
  • 1250 UPC Translator and Runtime -- Wei Chen
  • 120 GASNet -- Dan Bonachea and Mike Welcome
  • 150 Break
  • 200 Parallel Optimizations for UPC -- Costin
    Iancu
  • 230 Applications -- Parry Husbands
  • 300 Break
  • 315 Hardware Discussion -- Paul Hargrove
  • 345 Performance of Communication Networks --
    Jason Duell
  • 415 Discussion and Closing Remarks

6
Future Plans (1)
  • Language
  • Consistency model
  • Progress guarantees
  • Array library (other versions of memcopy)
  • Hierarchical machine support
  • Teams
  • UPC?

7
Future Plans (2)
  • Translator
  • Release
  • Beta to UF, Sandia?, GWU?, NSA?
  • Maintenance and tuning
  • Optimizations
  • Single processor performance
  • Privatization
  • Communication overlap and pipelining
  • Software caching
  • Aggregation
  • IA64 backend?
  • Debugging?

8
Future Plans (3)
  • Runtime
  • Shared memory implementation
  • I/O implementation
  • GASNet
  • Tuning and maintenance
  • Collectives
  • Strided and scatter/gather
  • X1 port
  • Infiniband port
  • Red Storm port ?
  • BlueGene/L port ?

9
Future Plans (4)
  • Applications
  • SuperLU, starting with Sparse Cholesky
  • PetSc?
  • NAS-like AMR benchmark?
  • Astrophysics code from UCB/McMaster
  • Robert Thacker
  • Sandia (Zhaofang Wen) ?
  • 3D Mesh generation based on Pyramid ?
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