Benchmarks on Compaq GS320 AlphaServer

Compaq GS320 AlphaServer

Machine Description


	Model Number	AlphaServer GS320
	Number of Processors	32
	Processor Type	Alpha EV67 at 731 MHz
	Memory Installed (Gbytes)	192
	Memory used by FMS (Gbytes)	32
	Operating System	Compaq Tru64 UNIX

Problem and Results

Code Used	Example 11
Matrix Sparsity	Full
Matrix Symmetry	Nonsymmetric with pivoting
Data Type	16-byte Complex

Results

Date Started	04/18/2001	04/18/2001	04/19/2001
Number of Equations	15,000	50,000	100,000
Matrix Storage Size (Gbytes)	7	55	183
File Location	Memory	Disk	Disk
Factoring CPU Time (Days::Hr:Min:Sec)	2:31:21	3::11:08:28	27::20:54:58
Factoring Wall Time (Hr:Min:Sec)	7:21	2:56:35	23:19:15
I/O Wait Time (Hr:Min:Sec)	0	8:10	28:34
Megaflops per Processor	991	1,113	1,107
Overall Megaflops	20,421	31,463	31,763
Parellel Speedup	20.6 out of 32	28.2 out of 32	28.6 out of 32

NOTES:

CPU Time is the total amount of User and System time used by all processors.

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.

I/O Wait Time is the total time spent waiting for I/O to complete that is not overlapped by asynchronous I/O.

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.

Overall Megaflops is the total number of floating point operations performed, divided by the Wall Time.

Parallel Speedup is overall increase in performance due to parallel processing.

Copyright © 2000 Multipath Corporation