Hello,
I found AXPOSF.PA.DEC.COM nearly completely unloaded (1 other
non-idle user and UNIX load-average was 0.0) today so I thought I might
just run the STREAM benchmarks on it because the only numbers I had
seen were for the DEC AXP 3000/500. The AXPOSF is a DEC AXP 4000/710
with a 21064-190/40 (internal/external MHZ) and a 4MB secondary cache.
The peek memory bus speed is rated at 640 MB/second (128-bits * 16
bytes/128-bits * 40 M clock-ticks/second). AXPOSF runs DEC OSF/1 V1.3.
I used the compiler (V1.3) options:
f77 -O4 -align dcommon stream_?.f second.o -o stream_?
(things like "-assume noaccuracy_sensitive" didn't make much
difference. I tried KAP "just to see" and I think it completely
deleted the main loop)
I was rather surprised at the results since they are lower than the DEC
AXP 3000/500 results. When I did the test I did 'up the "N" parameter
to 4,000,000 and I think this is the cause since when I left them at
the default they tended to wander (around the 100MB/sec). These
numbers seem stable and consistant:
--------------------------------------
Single precision appears to have 7 digits of accuracy
Assuming 4 bytes per default REAL word
--------------------------------------
Timing calibration ; time = 146.3024 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: 80.3603 0.3990 0.3982 0.3992
Scaling : 80.3601 0.3991 0.3982 0.3992
Summing : 79.1953 0.6080 0.6061 0.6100
SAXPYing : 78.8146 0.6107 0.6090 0.6149
--------------------------------------
Double precision appears to have 16 digits of accuracy
Assuming 8 bytes per DOUBLEPRECISION word
--------------------------------------
Timing calibration ; time = 360.6319956481457 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: 84.6114 0.7576 0.7564 0.7593
Scaling : 82.2759 0.7801 0.7779 0.7896
Summing : 85.0871 1.1300 1.1283 1.1322
SAXPYing : 83.8539 1.1469 1.1448 1.1536
-- Benjamin Z. Goldsteen
This archive was generated by hypermail 2b29 : Tue Apr 18 2000 - 05:23:03 CDT