ADAPTIVE_GIANT benchmark
Kris Kennaway
kris at obsecurity.org
Wed May 18 16:20:31 PDT 2005
I reran the 12-concurrent tarball extraction with adaptive giant
enabled/disabled, on the 12-processor e4500:
real time:
x adaptive-giant
+ no-adaptive-giant
+--------------------------------------------------------------------------+
| x + x |
| + x + + x |
| x + xx *x ++ xx+ + |
| x + ** ** *+ xx*+ + + |
| x x+ **+** ** *x**** * * +x + |
| x x x x+x*****************x*x* +x+ * + |
|x xxx **+x*x*********************x+x* * ++++ + + +x + +|
| |________A_________| |
| |_________M_A__________| |
+--------------------------------------------------------------------------+
N Min Max Median Avg Stddev
x 100 77.48 89.74 82.17 82.2382 2.2768285
+ 99 79.02 94.62 82.77 83.29596 2.6837291
Difference at 95.0% confidence
1.05776 +/- 0.691261
1.28621% +/- 0.840559%
(Student's t, pooled s = 2.48758)
system time:
x adaptive-giant
+ no-adaptive-giant
+--------------------------------------------------------------------------+
| +x |
| x +x + |
| x x xxx* x +* + |
| xx x+ xx** * +* + + + |
| xx x* x***x * ** ++ x+** + + + |
| x xxxx*x+x******x****++*+** +++++ x ++ |
|x x x x*xx****x**x******************* *++**++***+*+ *+ + +|
| |_________MA__________| |
| |__________MA___________| |
+--------------------------------------------------------------------------+
N Min Max Median Avg Stddev
x 100 428.87 515.95 468.41 469.8407 15.138894
+ 99 448.08 528.59 478.97 480.89152 15.913392
Difference at 95.0% confidence
11.0508 +/- 4.31528
2.35203% +/- 0.918455%
(Student's t, pooled s = 15.529)
user time
x adaptive-giant
+ no-adaptive-giant
+--------------------------------------------------------------------------+
| xx + |
| x xx + + |
| x xxx *x *x *++ + +++ |
| xx +xxx xx*+*x+**+*++ +* x *+++ |
| x xx*x+xx*+*+*x***x******* **+* *++++ + |
|x+ x * + +x* xx*x*x***********************+*+**+*++xx x+ +x+ +|
| |___________A__________| |
| |____________A___________| |
+--------------------------------------------------------------------------+
N Min Max Median Avg Stddev
x 100 27.66 28.96 28.35 28.3449 0.22686932
+ 99 27.67 29.1 28.47 28.459899 0.24268269
Difference at 95.0% confidence
0.114999 +/- 0.0652666
0.405713% +/- 0.230259%
(Student's t, pooled s = 0.234869)
So adaptive giant is in fact a small net win in all 3 measurements.
I'm not sure whether my previous measurements with generic build were
incorrect or have some other explanation.
Kris
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