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Exascale Initiatives at Edinburgh Edinburgh-Tsukuba Workshop Feb 2010

Exascale Initiatives at Edinburgh Edinburgh-Tsukuba Workshop Feb 2010. Richard Kenway University of Edinburgh. Exascale = Extreme Scale. Embedded terascale (hand-held, 10-100W) Departmental petascale (1-2 racks, 10-100kW) (Inter)national exascale (100 racks, 25-50MW) Challenges

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Exascale Initiatives at Edinburgh Edinburgh-Tsukuba Workshop Feb 2010

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  1. Exascale Initiatives at EdinburghEdinburgh-Tsukuba Workshop Feb 2010 Richard Kenway University of Edinburgh

  2. Exascale = Extreme Scale • Embedded terascale (hand-held, 10-100W) • Departmental petascale (1-2 racks, 10-100kW) • (Inter)national exascale (100 racks, 25-50MW) • Challenges • strong scaling = find 1000× more parallelism in applications • fault tolerance = new algorithms + validation/verification • energy efficiency = new programming model(s), eg minimise data movement, intelligent powering • novel hardware = GPGPUs, heterogeneous chips • massive (potentially corrupted) data = new I/O models Richard Kenway

  3. ? EESI EUROPEAN EXASCALE SOFTWARE INITIATIVE Edinburgh Research Environment Informatics Exascale Technology Centre data algorithms IDEA Lab Mathematics Exascale Research Initiative systems applications Physics & Astronomy Richard Kenway

  4. Strong Scaling • Hybrid programming models • feasibility of OpenMP + MPI for a set of applications • 24-way (HECToR) → 1000-way (exascale) SMP nodes • investigate new hybrid strategies for key algorithms e.g. FFTs • PGAS languages • investigate advantages and disadvantages of PGAS languages for exascale systems • Develop demonstrator applications and investigate performance characteristics • CP2K? Richard Kenway

  5. Other Areas of Interest • GPGPU/accelerator programmability • limited error detection/correction • variable precision • rich memory hierarchy • I/O performance • real-time massive data analyses • Verification and fault tolerance • asynchronous algorithms • tolerance to errors in data, communications, computation Richard Kenway

  6. Co-Design Vehicles • Aspiration pull vs applications chasm • global challenges make the case … but the codes are too immature • codes that are ready (eg QCD) don’t justify the investment • Technology push is not enough • politically – cost too high, too few companies will benefit • technically – there are many roads towards exascale … and potential dead ends • CDVs • applications that are scientifically sound with the potential to scale • provide development paths … while global challenge codes develop in parallel Richard Kenway

  7. G8 Call for Proposals – Opportunity for Collaboration Richard Kenway

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