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From: Con Kolivas <conman@kolivas.net>
To: linux kernel mailing list <linux-kernel@vger.kernel.org>
Cc: Andrew Morton <akpm@digeo.com>
Subject: [BENCHMARK] max bomb segment tuning with read latency 2 patch in contest
Date: Sat, 7 Dec 2002 16:20:01 +1100	[thread overview]
Message-ID: <200212071620.05503.conman@kolivas.net> (raw)

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Here are some io_load contest benchmarks with 2.4.20 with the read latency2 
patch applied and varying the max bomb segments from 1-6 (SMP used to save 
time!)

io_load:
Kernel [runs]           Time    CPU%    Loads   LCPU%   Ratio
2.4.20 [5]              164.9   45      31      21      4.55
2420rl2b1 [5]           93.5    81      18      22      2.58
2420rl2b2 [5]           88.2    87      16      22      2.44
2420rl2b4 [5]           87.8    84      17      22      2.42
2420rl2b6 [5]           100.3   77      19      22      2.77

io_other:
Kernel [runs]           Time    CPU%    Loads   LCPU%   Ratio
2.4.20 [5]              89.6    86      17      21      2.47
2420rl2b1 [3]           48.1    156     9       21      1.33
2420rl2b2 [3]           50.0    149     9       21      1.38
2420rl2b4 [5]           51.9    141     10      21      1.43
2420rl2b6 [5]           52.1    142     9       20      1.44

There seems to be a limit to the benefit of decreasing max bomb segments. It 
does not seem to have a significant effect on io load on another hard disk 
(although read latency2 is overall much better than vanilla).

Con
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             reply	other threads:[~2002-12-07  5:10 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2002-12-07  5:20 Con Kolivas [this message]
2002-12-07  5:55 ` [BENCHMARK] max bomb segment tuning with read latency 2 patch in contest Andrew Morton
2002-12-07  6:09   ` Con Kolivas
2002-12-07  6:14     ` Andrew Morton
2002-12-07  6:15   ` GrandMasterLee
2002-12-07  6:20   ` GrandMasterLee
2002-12-07  6:45     ` [BENCHMARK] max bomb segment tuning with read latency 2 patchin contest Andrew Morton
2002-12-07 13:29 ` [BENCHMARK] max bomb segment tuning with read latency 2 patch in contest Con Kolivas
2002-12-10 10:50 ` Miquel van Smoorenburg
2002-12-10 10:55   ` Marc-Christian Petersen

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