This page is maintained by Brendan M McLaughlin
How to contact me:
electronic mail:
bmclaughlin@cfa.harvard.edu
Telephone: (617)495-7386,
Fax: (617)496-7668
CRAY ARCHITECTURES
Cray C90
Cray T3D
The first scalable heterogenous supercomputer,
integrating parallel vector and MPP architecturs into
a single computing environment. The system uses processors
based on DEC's Alpha RISC processors,
technology running at 150 MHz. Features of the CRAY T3D
are the fast processors, shared-memory programming model
and the communications network. The communications network
is based on a 3D torus, and uses C90 technology to provide
the highest bandwidth and lowest latency yet implemented in
an MPP architecture, combined with sophisticated mechanisms
for hiding latency and fast processor synchrotonozation.
The programming model for the CRAY T3D is based on Cray
Research Adaptive Fortran , which supports both messaging passing
and data parallel programming in an environment that includes
Fortran 77, with Fortran 90 array syntax. C is also supported,
with a highly optimized version of Parallel Virtual Machine
(PVM) message passing.
The CRAY T3D at MSCI has 128 processors, with a peak speed
of 19.2 Gigaflops. Each processor has 64 Mb of memory and is
integrated with the currently installed C916/8-256 (C90)
through the HIPPI network to MSCI's other Cray and storage systems.
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