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SGI Origin

Machine Description

2800
Model Number Origin
Number of Processors 64
Processor Type R12000 @ 300 MHz
Operating System IRIX64, Rel. 6.5

Problem and Results

Date Started 05/16/2000 05/09/2000 05/10/2000 05/12/2000
Code Used Example 11 Example 11 Example 11 Example 11
Number of Equations 50,000 50,000 100,000 150,000
Number of Vectors 1 1 1 1
Matrix Sparsity Full Full Full Full
Matrix Symmetry Nonsymmetric
(with pivoting)		 Symmetric Symmetric Symmetric
Data Type 16-byte Complex 16-byte Complex 16-byte Complex 16-byte Complex
Memory for FMS(Gbytes) 16 16 32 32
CPU Time (Day::Hr:Min:Sec) 7::12:28:37 3::18:04:33 30::03:03:04 100::22:37:36
Wall Time (Day::Hr:Min:Sec) 3:20:21 1:47:06 12:26:37 1::16:32:01
I/O Wait Time (Hr:Min:Sec) 9:37 0:16 2:28 6:20
Megaflops per Processor 513 512 514 516
Overall Megaflops 27,731 25,937 29,764 30,838
Parellel Speedup 54.05 out of 64 50.46 out of 64 56.56 out of 64 59.77 out of 64

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.
  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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