STREAM on 225QC - 1 cpu

From: John McCalpin (mccalpin)
Date: Thu Jul 09 1998 - 17:57:47 CDT


bsw-1 7# ./stream
            100149D8
            10F56DD8
            11E991D8
----------------------------------------------
 Double precision appears to have 16 digits of accuracy
 Assuming 8 bytes per DOUBLE PRECISION word
----------------------------------------------
 Array size = 2000000
 Offset = 0
 The total memory requirement is 45 MB
 You are running each test 10 times
 The *best* time for each test is used
 ----------------------------------------------------
 Your clock granularity/precision appears to be 4 microseconds
 The tests below will each take a time on the order
 of 90731 microseconds
    (= 22683 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: 290.99 0.1100 0.1130 0.1125 0.1125 0.1128
Scale: 304.66 0.1050 0.1173 0.1160 0.1161 0.1172
Add: 320.37 0.1498 0.1501 0.1500 0.1500 0.1499
Triad: 319.05 0.1504 0.1506 0.1506 0.1506 0.1505
-----------------------------------------------------------------------------
 Sum of a is = 115330078125.0000
 Sum of b is = 23066015625.00000
 Sum of c is = 30754687500.00000
 a(1),a(n) = 1153300781250.000 1153300781250.000
 b(1),b(n) = 230660156250.0000 230660156250.0000
 c(1),c(n) = 307546875000.0000 307546875000.0000

-- 
--
John D. McCalpin, Ph.D.      Server System Architect
Server Platform Engineering  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