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Benchmarks

Machine Description

NEC-SX
Machine Type NEC SX-4
Number of Processors 16
15 used by FMS
Operating System SUPER-UX Release 7.2
FMS Memory 4 Gbytes

Problem Description

Code Used FMS Example 11
Matrix Sparsity Full
Matrix Symmetry Symmetric
Data Type 16 Byte Complex
FMS Parameter IALGOR 2
Number of Equations Various
Number of Vectors 1

Results

Date Started 3/7/98 3/7/98 3/7/98 3/8/98 3/8/98
Number of Equations 20,000 30,000 40,000 60,000 100,000
Matrix Storage Size (Gbytes) 4.80 8.23 15.09 31.09 86.42
Factoring CPU Time (Hr:Min:Sec) 1:16:23 4:10:14 9:44:21 32:22:56 148:10:05
Factoring Wall Time (Hr:Min:Sec) 7:01 18:44 42:55 2:15:46 10:27:32
I/O Wait Time (Hr:Min:Sec) :39 :49 1:57 3:33 25:23
Megaflops per Processor 2,327 2,398 2,434 2,470 2,500
Overall Megaflops 25,362 32,030 33,136 35,357 35,413
Parellel Speedup 10.9 out of 15 13.4 out of 15 13.6 out of 15 14.3 out of 15 14.2 out of 15

NOTES:

  1. CPU Time is the total amount of User and System time used by all processors.
  2. Wall Time is the elapsed time measured on a dedicated machine. This includes the time spent processing and any time spent waiting for I/O to complete.
  3. I/O Wait Time is the total time spent waiting for I/O to complete that is not overlapped by asynchronous I/O. This is included in Wall Time.
  4. Megaflops per Processor is the theoretical number of floating point operations performed, divided by the CPU time. When reduced operation algorithms are used, this is based on the number of floating point operations that would have been performed by the traditional algorithm.
  5. Overall Megaflops is the theoretical number of floating point operations performed, divided by the Wall Time.
  6. Parallel Speedup is overall increase in performance due to parallel processing.

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