asthma 19# ./stream.2e7
----------------------------------------------
Double precision appears to have 16 digits of accuracy
Assuming 8 bytes per DOUBLE PRECISION word
----------------------------------------------
Array size = 20000000
Offset = 0
The total memory requirement is 457 MB
You are running each test 10 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 893190 microseconds
(= 893190 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: 303.54 1.0542 1.1836 1.1705 1.1711 1.1835
Scale: 316.07 1.0124 1.0967 1.0877 1.0880 1.0960
Add: 327.75 1.4645 1.4716 1.4696 1.4696 1.4699
Triad: 330.24 1.4535 1.4547 1.4538 1.4538 1.4536
-----------------------------------------------------------------------------
All times are
1.0542 1.0124 1.4645 1.4539
1.1833 1.0960 1.4699 1.4535
1.1835 1.0961 1.4703 1.4535
1.1834 1.0958 1.4699 1.4537
1.1834 1.0961 1.4700 1.4537
1.1836 1.0959 1.4698 1.4535
1.1831 1.0960 1.4701 1.4538
1.1832 1.0962 1.4699 1.4536
1.1834 1.0958 1.4700 1.4539
1.1834 1.0967 1.4716 1.4547
-----------------------------------------------------------------------------
Sum of a is = 115330078125.0000
Sum of b is = 23066015625.00000
Sum of c is = 30754687500.00000
-- John D. McCalpin, Ph.D. Supercomputing Performance Analyst Technical Computing Group http://reality.sgi.com/mccalpin/ Silicon Graphics, Inc. mccalpin@sgi.com 650-933-7407
This archive was generated by hypermail 2b29 : Tue Apr 18 2000 - 05:23:07 CDT