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SubjectRe: [BENCHMARK] 2.5.47{-mm1} with contest
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>On Tue, Nov 12 2002, Giuliano Pochini wrote:
>> On 12-Nov-2002 Andrew Morton wrote:
>> > 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
>> >
>> > We've increased the kernel build speed by 3.6x while decreasing the
>> > speed at which writes are retired by 5.3x.
>>
>> Did the elevator change between .46 and .47 ?
>
>No, but the fifo_batch count (which controls how many requests are moved
>sort list to dispatch queue) was halved. This gives lower latency, at
>the possible cost of dimishing throughput.

Preempt also lowered this value, and ReiserFS changes may have affected it
further (test machine running Reiser).

Con
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