Author(s)

V. Zecca

Abstract

High performance I/O in supercomputing applications V. Zecca IBM ECSEC European Center for Scientific and Engineering Computing, Viale Oceano Pacifico ABSTRACT At the IBM European Center for Scientific and Engineering Computing a proto- type has been written for transparent transformation of I/O primitives into access to processor storage, thus allowing applications to continue to use standard high level language I/O statements, but taking advantage of the full storage hierarchy provided by the underlying processor in a VM/ESA environment. The prototype for High Per- formance CMS I/O (HPCMSIO) may be used with high level programming languages like FORTRAN, C, PL/1, and Assembler, of course. Purpose of the work was to demonstrate the capability of VM/ESA to optimally execute an industrial code on a supercomputer exploiting its storage hierarchy, and particularly the virtual and expanded storage, with negligible intervention on the programmer's side. The present paper

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