I tried your streams benchmark on my new RS/6000 355, using xlf 2.3 with
-O3 (when I used the preprocessors, they apparently optimized everything
away). Here are the results:
out.IBM_355_d (n=1000000)
--------------------------------------
Double precision appears to have 16 digits of accuracy
Assuming 8 bytes per DOUBLEPRECISION word
--------------------------------------
Timing calibration ; time = 46.0000008344650269 hundredths of a second
Increase the size of the arrays if this is <30 and your clock precision is =<1/100 second
---------------------------------------------------
Function Rate (MB/s) RMS time Min time Max time
Assignment: 133.3335 .1210 .1200 .1300
Scaling : 133.3335 .1281 .1200 .1300
Summing : 114.2860 .2100 .2100 .2100
SAXPYing : 120.0001 .2061 .2000 .2100
out.IBM_355_s (n=2000000)
--------------------------------------
Single precision appears to have 7 digits of accuracy
Assuming 4 bytes per default REAL word
--------------------------------------
Timing calibration ; time = 56.00000000 hundredths of a second
Increase the size of the arrays if this is <30 and your clock precision is =<1/100 second
---------------------------------------------------
Function Rate (MB/s) RMS time Min time Max time
Assignment: 100.0000 .1641 .1600 .1700
Scaling : 84.2105 .1951 .1900 .2000
Summing : 85.7144 .2830 .2800 .2900
SAXPYing : 85.7144 .2800 .2800 .2800
On this benchmark, my rather inexpensive 355 seems to compare very well
with much more expensive machines from Sun and SGI.
**********************************************************************
James G. MacKinnon Department of Economics
phone: 613 545-2293 Queen's University
Fax: 613 545-6668 Kingston, Ontario, Canada
Internet: jgm@doug.econ.queensu.ca K7L 3N6
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