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| Machine type | Processor array |
|---|---|
| Models | MP2201, MP2202, MP2204, MP2208, MP2216 |
| Front-end | DECstation 5000 or DEC VAX |
| Operating system | Internal OS transparent to the user, Ultrix or VMS on front-end |
| Connection structure | 2-D mesh, crossbar (see remarks) |
| Compilers | MPL: (C with extensions), MPF: (Fortran 90-like with extensions) |
System parameters:
| Model | MP2201 | MP2202 | MP2204 | MP2208 | MP2216 |
|---|---|---|---|---|---|
| Clock cycle | 80 ns | 80 ns | 80 ns | 80 ns | 80 ns |
| No. of processors | 1024 | 2048 | 4096 | 8192 | 16384 |
| Theor. peak performance | |||||
| Per proc. (Mflop/s ) | 0.15 | 0.15 | 0.15 | 0.15 | 0.15 |
| Mop/s (32-bit) | 4250 | 8500 | 17000 | 34000 | 68000 |
| Mop/s (64-bit) | 2100 | 4250 | 8500 | 17000 | 34000 |
| Mflop/s (32-bit) | 400 | 800 | 1600 | 3200 | 6300 |
| Mflop/s (64-bit) | 150 | 300 | 600 | 1200 | 2400 |
| Program memory | 1-4MB | 1-4MB | 1-4MB | 1-4MB | 1-4MB |
| Data memory | 64MB | 128MB | 256MB | 512MB | 1GB |
| Int. comm. speed | |||||
| Via Xnet (n. neighbour) | 1.25 GB/s | 2.5 GB/s | 5.0 GB/s | 10.0 GB/s | 20.0 GB/s |
| Via global router | 80 MB/s | 160 MB/s | 320 MB/s | 640 MB/s | 1.28 GB/s |
Remarks: Apart from being roughly 2.5 times faster than the MasPar MP-1 (3.2.4), there is little difference between the MP-2 and the MP-1. The gain in speed relative to the MP-1 is accomplished by using a processor with a higher degree of bit-parallelism. This resulted in a higher performance at the expense of the number of data formats: only 32-bit and 64-bit data are allowed on the MP-2.
MasPar will market both the MP-1 and MP-2. In the view of the company there is a market for both. With a fixed budget one can make a choice for a system with larger memory, but slower or a faster system with a smaller memory.
Software and tools are exactly the same for both types of machines.
Measured Performances: In [2] a speed of 1.6 Gflop/s was reported for a 16,384 processor machine in solving a 11,264 order full linear system.
Copyright © 1996 Aad J. van der Steen and Jack J. Dongarra
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