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SubjectRe: [BENCHMARK] 2.5.59{-mm2} with contest
Con Kolivas <conman@kolivas.net> wrote:
>
> io_load:
> Kernel [runs] Time CPU% Loads LCPU% Ratio
> 2.5.58 3 136 58.8 6 12.4 1.84
> 2.5.58-mm1 3 138 55.8 7 13.0 1.86
> 2.5.59 4 113 68.1 4 9.7 1.53
> 2.5.59-mm2 3 563 12.8 38 17.4 7.61

I don't see such gross variations here, and there's nothing between -mm1 and
-mm2 which could cause this. (BTW: what idiot broke diffstat as distributed
in rh8.0? It fails to understand interdiff output, which is quite
legitimately formatted).

However there are some interesting snippets. Elapsed time for io_load:

2.5.59: 182,183,180
2.5.59 + deadline-np-42: 198,114,106,112,183,140
2.5.59 + deadline-np-42 + deadline-np-43: 224,224
2.5.59-mm2: 212,239

So it looks like deadline-np-42.patch lessens starvation of reads by writes,
and deadline-np-43.patch considerably worsens it.

But this is all just fiddling around. Nick is working on an implementation
of anticipatory scheduling, which is a whole new ball game. The pressure is
on ;)


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