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The Meiko Computing Surface 2.

Machine type: Distributed-memory multi-vectorprocessor.
Models: Computing Surface 2.
Operating system: Internal OS transparent to the user, SunOS (Sun's Unix variant) on the front-end system.
Connection structure: Multistage crossbar.
Compilers: Extended Fortran 77, ANSI C.

System parameters:


Note: and for a 64 node are quoted.

The CS-2 features 8-1,024 processor elements (PEs) which can be either scalar or vector nodes. Apart from a separate communications module, these PEs contain either a SuperSparc or a SuperSparc + 2 VP vectorprocessors. The speed of a scalar PE is estimated to be 40 Mflop/s (at a 20 ns clock) and 200 Mflop/s for the vector PEs for 64-bit precision. The VP modules are manufactured by Fujitsu. The speed at 32-bit precision is doubled with respect to 64-bit operation and, unlike the earlier Fujitsu VP products, use IEEE 754 floating-point format. The memory has 16 banks and to avoid memory bank conflicts the CS-2 has the interesting option to have scrambled allocation of addresses, thus guaranteeing good access at potential problematic strides 2, 4, etc.

The point-to-point communication speed is 100 MB/s (50 MB/s in each direction). Because the communication happens through multi-level crossbars, called ``layers'' by Meiko, the aggregate bandwidth of the system scales with the number of PEs, with a very respectable latency of 200 ns per layer. As the maximum configuration of the machine contains 1,024 PEs, the theoretical peak performance at 64-bit precision is 200 Gflop/s. It is possible to connect each PE to its own I/O devices to have scalable parallel I/O with the scaling of other resources.
Tue Nov 14 15:39:09 PST 1995