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IBM 575

Machine Description

Model Number 575
Processor Type Power5 Dual Core @ 1.9GHz
Number of Processors 8
Number of Cores 16
Memory Installed 64 Gbytes
Memory Used by FMS 48 Gbytes
Operating System AIX 5.3
ESSL Version 04.02.00.04

Problem Description

Code Used Example 11
Matrix Sparsity Full
Matrix Symmetry Symmetric and Nonsymmetric
Data Type 16-byte Complex
Number of Equations 20,000 to 125,000
Number of Vectors 1
Type of I/O Direct (IOTYPE=2)
Reduced Operation Algorithms None (IALGOR=0)

Results for Complex Symmetric Matrices

Date
Started		 Number of
Equations		 Storage Times (Day::Hr:Min:Sec) Megaflops Parallel
Speedup
Loc. Gbytes CPU Wall I/O Wait CPU Overall
04/25/07 20,000 Mem. 5.2 27:59 1:55 0:00 6,352 92,995 14.6
04/25/07 20,000 Disk 5.2 29:01 2:21 0:23 6,128 75,746 12.6
04/25/07 40,000 Mem. 14.3 3:42:52 14:31 0:00 6,382 97,953 15.3
04/25/07 40,000 Disk 14.3 3:44:19 14:60 0:28 6,340 94,836 15.0
04/25/07 60,000 Disk 36.6 13:03:17 51:33 0:45 6,128 93,101 15.2
04/25/07 80,000 Disk 57.2 1::06:03:23 1:58:13 1:49 6,309 96,245 15.3
04/28/07 100,000 Disk 96.7 2::10:16:02 3:52:45 8:22 6,356 95,476 15.0
04/28/07 125,000 Disk 153.8 4::18:42:42 7:35:37 12:46 6,306 95,262 15.1

Results for Complex Nonsymmetric Matrices

Date
Started		 Number of
Equations		 Storage Times (Day::Hr:Min:Sec) Megaflops Parallel
Speedup
Loc. Gbytes CPU Wall I/O Wait CPU Overall
04/26/07 20,000 Mem. 10.3 55:11 3:39 0:00 6,445 97,445 15.1
04/28/07 20,000 Disk 10.3 57:20 4:13 0:22 6,202 84,474 13.6
04/28/07 40,000 Disk 28.6 7:21:57 29:20 0:48 6,436 96,965 15.1
04/28/07 60,000 Disk 73.2 1::01:50:48 1:42:07 1:59 6,190 94,011 15.2
04/28/07 80,000 Disk 114.4 2::11:16:10 3:55:52 8:39 6,399 96,479 15.1

Results for Complex Nonsymmetric Matrices with Pivoting

Date
Started		 Number of
Equations		 Storage Times (Day::Hr:Min:Sec) Megaflops Parallel
Speedup
Loc. Gbytes CPU Wall I/O Wait CPU Overall
04/29/07 20,000 Mem. 6.5 57:05 3:43 0:00 6,229 95,635 15.4
04/29/07 20,000 Disk 6.5 59:14 4:18 0:26 6,003 82,809 13.8
04/29/07 40,000 Disk 24.8 7:35:17 30:54 1:39 6,248 92,047 14.7
04/29/07 60,000 Disk 56.5 1::01:16:00 1:40:33 3:46 6,332 95,475 15.1
04/28/07 100,000 Disk 157.6 5::03:59:12 8:08:14 12:24 5,974 91,033 15.2

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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