Peter Kjellstrom wrote:
[EMAIL PROTECTED] streamd]# hostname ; date ; for i in 1 2 3 4 5 ; do export
OMP_NUM_THREADS=$i ; ./streamd | egrep "Total memory re|Number of Th|Function
|Copy:|Scale:|Add:|Triad:"; done
tbox3
Fri Aug 11 17:59:22 CEST 2006
Total memory required = 457.8 MB.
Number of Threads requested = 1
Function Rate (MB/s) Avg time Min time Max time
Copy: 3945.5494 0.0812 0.0811 0.0813
Scale: 2914.9758 0.1098 0.1098 0.1099
Add: 3227.5618 0.1488 0.1487 0.1489
Triad: 3219.5307 0.1492 0.1491 0.1493
Total memory required = 457.8 MB.
Number of Threads requested = 2
Function Rate (MB/s) Avg time Min time Max time
Copy: 4324.2058 0.0741 0.0740 0.0742
Scale: 2999.9626 0.1068 0.1067 0.1069
Add: 3309.2733 0.1451 0.1450 0.1452
Triad: 3309.7031 0.1451 0.1450 0.1452
Total memory required = 457.8 MB.
Number of Threads requested = 3
Function Rate (MB/s) Avg time Min time Max time
Copy: 5422.5441 0.0590 0.0590 0.0590
Scale: 4102.8364 0.0780 0.0780 0.0781
Add: 4487.2464 0.1070 0.1070 0.1070
Triad: 4487.7465 0.1070 0.1070 0.1070
Total memory required = 457.8 MB.
Number of Threads requested = 4
Function Rate (MB/s) Avg time Min time Max time
Copy: 6023.2969 0.0532 0.0531 0.0533
Scale: 4862.4855 0.0658 0.0658 0.0659
Add: 5264.1973 0.0912 0.0912 0.0913
Triad: 5268.1782 0.0911 0.0911 0.0911
Total memory required = 457.8 MB.
Number of Threads requested = 5
Function Rate (MB/s) Avg time Min time Max time
Copy: 5504.9004 0.0582 0.0581 0.0582
Scale: 4318.9044 0.0786 0.0741 0.1147
Add: 4705.1016 0.1042 0.1020 0.1216
Triad: 4705.2885 0.1038 0.1020 0.1184
Hmmm... What MB/chipset is in use? What are the MB bios settings
relating to interleaving?
That doesn't look anything close to what I would expect.
--
Joseph Landman, Ph.D
Founder and CEO
Scalable Informatics LLC,
email: [EMAIL PROTECTED]
web : http://www.scalableinformatics.com
phone: +1 734 786 8423
fax : +1 734 786 8452 or +1 866 888 3112
cell : +1 734 612 4615
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