Messages in this thread | | | From | Con Kolivas <> | Subject | Re: [BENCHMARK] 2.5.47{-mm1} with contest | Date | Tue, 12 Nov 2002 20:40:05 +1100 |
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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).
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