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Compaq "Wildfire" GS160 AlphaServers

Machine Description

Model Number COMPAQ AlphaServers GS160
Number of Processors 16
Processor Type Alpha EV67 at 731 MHz
Operating System Compaq Tru64 UNIX Version X5.1-BL9

Problem and Results

Memory Installed (Gbytes) 64 64 64 64
Memory for FMS (Gbytes) 16 48 16 16
Code Used Example 11 Example 11 Example 11 Example 11
Date Started 08/09/2000 04/22/2000 08/10/2000 08/10/2000
Number of Equations 15,000 50,000 50,000 100,000
Number of Vectors 1 1 1 1
Matrix Sparsity Full Full Full Full
Matrix Symmetry Nonsymmetric
With Pivoting		 Symmetric Nonsymmetric
With Pivoting		 Nonsymmetric
With Pivoting
Data Type 16-byte Complex 16-byte Complex 16-byte Complex 16-byte Complex
CPU Time (Days::Hr:Min:Sec) 2:18:34 1::21:10:32 3::11:49:36 26::08:40:40
Wall Time (Hr:Min:Sec) 10:07 3:12:07 5:49:41 1::18:31:35
I/O Wait Time (Hr:Min:Sec) Incore 2:37 8:23 37:37
Megaflops per Processor 1,082 1,024 1,104 1,170
Overall Megaflops 14,823 14,459 15,887 17,418
Parellel Speedup 13.7 out of 16 13.7 out of 16 14.3 out of 16 14.8 out of 16

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.
  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 total 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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