Abstract

ECMWF has run a parallel spectral model in daily production since 1985. Initially, this executed on a Cray X-MP/22 and later on a Cray X-MP/48. The degree of high-level parallelism so far exploited is low because it is sufficient to provide the basic need, that is minimum wall clock execution time in a production environment. However, low-level parallelism in the form of vectorised Fortran code is very substantial. 99% of all floating point operations are performed in vector mode.

Keywords

Convection Europe Expense 

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References

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    Dent, D.W., The Multitasking Spectral Model at ECMWF, in: G.-R. Hoffmann and D.F. Snelling, eds., Multiprocessing in Meteorological Models ( Springer Verlag, Berlin, 1988 ) 203–213.CrossRefGoogle Scholar
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Copyright information

© Springer-Verlag Berlin Heidelberg 1990

Authors and Affiliations

  • David Dent
    • 1
  1. 1.European Centre for Medium-Range Weather ForecastsReading, BerkshireUK

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