Re: [PATCH 2.4.20-aa1] Readlatency-2

Con Kolivas
2002-12-06T11:50:46Z

>Con Kolivas wrote:
>> io_load:
>> Kernel [runs] Time CPU% Loads LCPU% Ratio
>> 2.4.20 [5] 203.4 33 40 15 3.07
>> 2.4.20aa1 [3] 238.3 27 46 15 3.60
>> 2.4.20aa1rl2 [3] 302.5 22 63 16 4.57
>
>Something must have gone wrong here. rl2 cannot be worse than
>2.4.20 in this test.
>
>Umm, quick sanity check:
>
>2.4.20-rl2 321.44 147% 96 24%
>2.4.20 361.70 130% 108 24%
>
>So only a 10% speedup, but certainly not a 50% slowdown. (That is
>on scsi).
>
>Maybe a patch preparation problem?

This seems to be more of a disagreement with -aa1 and -rl2 than -rl2 per se.
Just FYI here's a copy of the SMP results that were in the other thread
entitled "[PATCH] 2.4.20-rmap15a":

io_load:
Kernel [runs] Time CPU% Loads LCPU% Ratio
2.4.19 [5] 162.3 45 28 19 4.48
2.4.20 [5] 164.9 45 31 21 4.55
2.4.20-rl2 [3] 101.8 76 19 22 2.81

io_other:
Kernel [runs] Time CPU% Loads LCPU% Ratio
2.4.19 [5] 62.3 117 11 20 1.72
2.4.20 [5] 89.6 86 17 21 2.47
2.4.20-rl2 [3] 51.8 142 10 21 1.43

Con
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