Messages in this thread | | | Date | Tue, 12 Nov 2002 10:20:45 +0100 | From | Jens Axboe <> | Subject | Re: [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.
-- Jens Axboe
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