[BENCHMARK] max bomb segment tuning with read latency 2 patch in contest

Con Kolivas
2002-12-07T05:10:01Z

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Here are some io_load contest benchmarks with 2.4.20 with the read latency2
patch applied and varying the max bomb segments from 1-6 (SMP used to save
time!)

io_load:
Kernel [runs] Time CPU% Loads LCPU% Ratio
2.4.20 [5] 164.9 45 31 21 4.55
2420rl2b1 [5] 93.5 81 18 22 2.58
2420rl2b2 [5] 88.2 87 16 22 2.44
2420rl2b4 [5] 87.8 84 17 22 2.42
2420rl2b6 [5] 100.3 77 19 22 2.77

io_other:
Kernel [runs] Time CPU% Loads LCPU% Ratio
2.4.20 [5] 89.6 86 17 21 2.47
2420rl2b1 [3] 48.1 156 9 21 1.33
2420rl2b2 [3] 50.0 149 9 21 1.38
2420rl2b4 [5] 51.9 141 10 21 1.43
2420rl2b6 [5] 52.1 142 9 20 1.44

There seems to be a limit to the benefit of decreasing max bomb segments. It
does not seem to have a significant effect on io load on another hard disk
(although read latency2 is overall much better than vanilla).

Con
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