Con Kolivas wrote:
>
> io_load:
> Kernel [runs] Time CPU% Loads LCPU% Ratio
> 2.4.18 [3] 474.1 15 36 10 6.64
> 2.4.19 [3] 492.6 14 38 10 6.90
> 2.5.46 [1] 600.5 13 48 12 8.41
> 2.5.46-mm1 [5] 134.3 58 6 8 1.88
> 2.5.47 [3] 165.9 46 9 9 2.32
> 2.5.47-mm1 [5] 126.3 61 5 8 1.77
>
> Very nice. Further improvement in 2.5.47-mm1 (note the big change in 2.5.46-47
> is consistent with the preempt addition as mentioned in a previous thread)
>
Actually, 2.5.47 changed fifo_batch from 32 to 16. That's what caused
this big shift.
We've increased the kernel build speed by 3.6x while decreasing the
speed at which writes are retired by 5.3x.
It could be argued that this is a net decrease in throughput. Although
there's clearly a big increase in total CPU utilisation.
It's a tradeoff. I think this is a better tradeoff than the old one
though.
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This archive was generated by hypermail 2b29 : Fri Nov 15 2002 - 22:00:24 EST