SGI Origin 3800
500 MHz MIPS R14K
8 MB cache
512GB Main Memory
IRIX 6.5.12
Results:
----------------------------------------------
Double precision appears to have 16 digits of accuracy
Assuming 8 bytes per DOUBLE PRECISION word
----------------------------------------------
Array size = 1280000000
Offset = 0
The total memory requirement is 29296 MB
You are running each test 4 times
The *best* time for each test is used
----------------------------------------------------
Your clock granularity/precision appears to be 1 microseconds
The tests below will each take a time on the order
of 171158 microseconds
(= 171158 clock ticks)
Increase the size of the arrays if this shows that
you are not getting at least 20 clock ticks per test.
----------------------------------------------------
WARNING -- The above is only a rough guideline.
For best results, please be sure you know the
precision of your system timer.
----------------------------------------------------
Function Rate (MB/s) Min time Max time Mean time RMS time Median
Copy: 87019.47 0.2353 0.2360 0.2358 0.2358 0.2360
Scale: 85514.35 0.2395 0.2408 0.2404 0.2404 0.2407
Add: 101695.60 0.3021 0.3022 0.3021 0.3021 0.3021
Triad: 99680.15 0.3082 0.3083 0.3083 0.3083 0.3083
-----------------------------------------------------------------------------
All times are
0.2353 0.2395 0.3022 0.3083
0.2360 0.2408 0.3021 0.3083
0.2360 0.2407 0.3021 0.3082
0.2360 0.2408 0.3021 0.3082
-----------------------------------------------------------------------------
Sum of a is = 25312.50000140095
Sum of b is = 5062.499999554688
Sum of c is = 6749.999999116869
-Kumaran
--
Kumaran Kalyanasundaram, PhD 2060 E. Algonquin Road
Performance Engineering Schaumburg, IL 60173
SGI Ph.# (847) 925 2913
This archive was generated by hypermail 2b29 : Mon May 21 2001 - 08:38:47 CDT