Re: [BENCHMARK] 2.5.60-cfq with contest

Jens Axboe (axboe@suse.de)
Tue, 11 Feb 2003 11:59:44 +0100


On Tue, Feb 11 2003, Con Kolivas wrote:
> Here's a quick set of the relevant results with the untuned CFQ by Jens:

Thanks!

> ctar_load:
> Kernel [runs] Time CPU% Loads LCPU% Ratio
> 2.5.60 2 99 78.8 1.0 4.0 1.25
> 2.5.60-cfq 1 101 78.2 1.0 4.0 1.28
> xtar_load:
> Kernel [runs] Time CPU% Loads LCPU% Ratio
> 2.5.60 2 101 76.2 1.0 5.0 1.28
> 2.5.60-cfq 1 115 66.1 1.0 4.3 1.46
> io_load:
> Kernel [runs] Time CPU% Loads LCPU% Ratio
> 2.5.60 2 139 54.7 29.0 12.1 1.76
> 2.5.60-cfq 1 606 12.7 212.0 21.6 7.67
> io_other:
> Kernel [runs] Time CPU% Loads LCPU% Ratio
> 2.5.60 2 90 83.3 10.8 5.5 1.14
> 2.5.60-cfq 1 89 84.3 10.8 5.6 1.13
> read_load:
> Kernel [runs] Time CPU% Loads LCPU% Ratio
> 2.5.60 2 103 74.8 6.2 6.8 1.30
> 2.5.60-cfq 1 103 76.7 6.9 5.8 1.30
> list_load:
> Kernel [runs] Time CPU% Loads LCPU% Ratio
> 2.5.60 2 95 80.0 0.0 6.3 1.20
> 2.5.60-cfq 1 95 81.1 0.0 6.3 1.20
>
> Write based loads hurt. No breakages, but needs tuning.

That's not even as bad as I had feared. I'll try to do some tuning with
contest locally.

-- 
Jens Axboe

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