Here are contest results (http://contest.kolivas.net) for 2.5.51 and related
kerneles using the dedicated osdl (http://www.osdl.org) hardware.
Uniprocessor:
noload:
Kernel [runs] Time CPU% Loads LCPU% Ratio
2.5.49 [5] 70.0 96 0 0 1.05
2.5.50 [5] 69.9 96 0 0 1.05
2.5.50-mm1 [5] 71.4 94 0 0 1.07
2.5.51 [2] 69.8 96 0 0 1.05
cacherun:
Kernel [runs] Time CPU% Loads LCPU% Ratio
2.5.49 [5] 67.4 99 0 0 1.01
2.5.50 [5] 67.3 99 0 0 1.01
2.5.50-mm1 [5] 67.8 99 0 0 1.02
2.5.51 [2] 67.2 99 0 0 1.01
process_load:
Kernel [runs] Time CPU% Loads LCPU% Ratio
2.5.49 [5] 85.2 79 17 20 1.28
2.5.50 [5] 84.8 79 17 19 1.27
2.5.50-mm1 [5] 86.6 78 18 20 1.30
2.5.51 [2] 85.2 79 17 20 1.28
dbench_load:
Kernel [runs] Time CPU% Loads LCPU% Ratio
2.5.49 [5] 210.5 37 2 50 3.15
2.5.50 [5] 189.2 40 2 49 2.83
2.5.50-mm1 [5] 243.3 34 2 51 3.64
2.5.51 [12] 195.8 39 2 50 2.93
ctar_load:
Kernel [runs] Time CPU% Loads LCPU% Ratio
2.5.49 [5] 106.1 82 2 9 1.59
2.5.50 [5] 107.5 81 3 9 1.61
2.5.50-mm1 [5] 88.0 83 1 4 1.32
2.5.51 [7] 107.0 81 3 9 1.60
xtar_load:
Kernel [runs] Time CPU% Loads LCPU% Ratio
2.5.49 [5] 184.8 70 3 8 2.77
2.5.50 [5] 189.5 61 4 9 2.84
2.5.50-mm1 [5] 104.9 70 1 6 1.57
2.5.51 [7] 163.7 67 3 8 2.45
io_load:
Kernel [runs] Time CPU% Loads LCPU% Ratio
2.5.49 [5] 127.4 57 14 13 1.91
2.5.50 [5] 142.6 54 19 14 2.14
2.5.50-mm1 [5] 174.2 46 24 15 2.61
2.5.51 [7] 125.6 58 14 12 1.88
io_other:
Kernel [runs] Time CPU% Loads LCPU% Ratio
2.5.49 [5] 97.4 75 7 11 1.46
2.5.50 [5] 106.9 69 10 11 1.60
2.5.50-mm1 [5] 101.8 70 9 11 1.52
2.5.51 [7] 105.1 69 9 11 1.57
read_load:
Kernel [runs] Time CPU% Loads LCPU% Ratio
2.5.49 [5] 88.2 80 15 6 1.32
2.5.50 [5] 88.5 80 15 7 1.33
2.5.50-mm1 [5] 86.6 80 3 2 1.30
2.5.51 [2] 88.4 80 15 7 1.32
list_load:
Kernel [runs] Time CPU% Loads LCPU% Ratio
2.5.49 [5] 81.4 85 0 8 1.22
2.5.50 [5] 81.2 85 0 8 1.22
2.5.50-mm1 [5] 82.4 84 0 7 1.23
2.5.51 [2] 80.8 85 0 8 1.21
mem_load:
Kernel [runs] Time CPU% Loads LCPU% Ratio
2.5.49 [5] 98.1 76 43 2 1.47
2.5.50 [5] 98.3 76 44 2 1.47
2.5.50-mm1 [5] 116.9 67 47 1 1.75
2.5.51 [7] 99.3 76 45 2 1.49
A little shorter compile times under io load and xtar load.
SMP:
noload:
Kernel [runs] Time CPU% Loads LCPU% Ratio
2.5.49 [6] 39.3 181 0 0 1.09
2.5.50 [5] 39.3 180 0 0 1.09
2.5.50-mm1 [6] 39.4 181 0 0 1.09
2.5.51 [3] 39.6 180 0 0 1.09
cacherun:
Kernel [runs] Time CPU% Loads LCPU% Ratio
2.5.49 [6] 36.6 194 0 0 1.01
2.5.50 [5] 36.5 194 0 0 1.01
2.5.50-mm1 [6] 36.6 194 0 0 1.01
2.5.51 [3] 36.5 195 0 0 1.01
process_load:
Kernel [runs] Time CPU% Loads LCPU% Ratio
2.5.49 [6] 50.0 141 11 52 1.38
2.5.50 [5] 47.8 148 10 46 1.32
2.5.50-mm1 [5] 47.6 150 8 43 1.31
2.5.51 [3] 50.5 139 12 54 1.39
dbench_load:
Kernel [runs] Time CPU% Loads LCPU% Ratio
2.5.49 [5] 119.8 96 0 26 3.31
2.5.50 [5] 199.8 101 0 24 5.52
2.5.50-mm1 [5] 164.3 67 0 29 4.54
2.5.51 [7] 57.9 144 0 27 1.60
ctar_load:
Kernel [runs] Time CPU% Loads LCPU% Ratio
2.5.49 [5] 53.8 161 1 10 1.49
2.5.50 [5] 54.6 157 1 10 1.51
2.5.50-mm1 [5] 51.3 155 0 4 1.42
2.5.51 [7] 58.2 158 1 10 1.61
xtar_load:
Kernel [runs] Time CPU% Loads LCPU% Ratio
2.5.49 [5] 72.9 132 1 10 2.01
2.5.50 [5] 116.2 103 2 10 3.21
2.5.50-mm1 [5] 83.9 111 1 9 2.32
2.5.51 [7] 104.8 124 2 10 2.89
io_load:
Kernel [runs] Time CPU% Loads LCPU% Ratio
2.5.49 [5] 75.5 110 9 18 2.09
2.5.50 [5] 87.6 102 14 22 2.42
2.5.50-mm1 [5] 99.0 92 14 21 2.73
2.5.51 [7] 84.6 102 13 21 2.34
io_other:
Kernel [runs] Time CPU% Loads LCPU% Ratio
2.5.49 [5] 64.2 130 8 19 1.77
2.5.50 [5] 59.3 139 7 18 1.64
2.5.50-mm1 [5] 70.5 125 10 22 1.95
2.5.51 [7] 64.5 134 7 18 1.78
read_load:
Kernel [runs] Time CPU% Loads LCPU% Ratio
2.5.49 [5] 49.1 152 5 7 1.36
2.5.50 [5] 49.3 151 5 7 1.36
2.5.50-mm1 [5] 52.1 142 2 3 1.44
2.5.51 [3] 48.5 154 5 7 1.34
list_load:
Kernel [runs] Time CPU% Loads LCPU% Ratio
2.5.49 [5] 43.4 167 0 8 1.20
2.5.50 [5] 43.4 167 0 8 1.20
2.5.50-mm1 [5] 44.0 167 0 7 1.22
2.5.51 [3] 43.5 167 0 8 1.20
mem_load:
Kernel [runs] Time CPU% Loads LCPU% Ratio
2.5.49 [5] 62.5 145 35 3 1.73
2.5.50 [5] 63.3 141 36 3 1.75
2.5.50-mm1 [5] 67.1 126 39 3 1.85
2.5.51 [7] 62.6 148 38 3 1.73
The big difference in dbench_load in the SMP run is unusual but probably not
as significant as it appears. This load seems to occasionally create
pathological runs (probably the nature of running dbench as a load) and less
pathological runs occured in 2.5.51.
Overall the difference b/w 2.5.50 and 2.5.51 is small
Full hardware details and log runs can be found when the web server syncs up
at :
http://www.osdl.org/projects/ctdevel/results/
Con
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