Date: Wed, 06 Aug 1997 21:57:00 +1000 From: George Michaelson <ggm@connect.com.au> To: Bruce Evans <bde@zeta.org.au> Cc: msmith@atrad.adelaide.edu.au, current@freebsd.org Subject: Re: canonical issue wrt DMA & wd/wdc Message-ID: <23816.870868620@connect.com.au> In-Reply-To: Your message of "Wed, 06 Aug 1997 21:30:42 %2B1000." <199708061130.VAA15302@godzilla.zeta.org.au>
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I applied them, made a kernel and ran bonnie single user under each
on a fujitsu 1.2Gb drive. here is the outcomes:
-------Sequential Output-------- ---Sequential Input-- --Random--
-Per Char- --Block--- -Rewrite-- -Per Char- --Block--- --Seeks---
Machine MB K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU /sec %CPU
p100-no3 20 2285 63.1 2715 11.0 2528 19.1 3820 96.5 36465 100.1 825.4 22.9
p100-no3 20 2340 65.6 2748 11.1 2459 17.5 3830 96.3 36437 100.0 860.8 23.0
p100-no3 20 2378 63.4 4863 18.8 5076 29.2 3956 99.1 36521 100.1 781.8 21.4
p100-no3 20 2462 65.3 4666 18.1 5384 33.6 3949 99.1 36485 100.1 788.5 21.6
p100+32 20 2879 77.9 6762 24.7 6655 39.8 3842 96.4 29165 100.0 798.9 22.6
p100+32 20 2900 78.9 5961 25.5 7216 42.6 3969 99.2 29109 98.9 789.9 23.0
p100+32 20 2821 77.7 4594 19.2 4592 29.8 3838 95.8 28799 99.9 809.3 23.7
p100+32 20 2821 78.2 4589 20.8 4607 27.2 3828 96.1 28850 100.0 784.8 23.8
no3 is no flags. +32 is with flags 80ff.
Interesting that while per-char and sequential block output had slight
improvement, input gets marginally worse for flagged disk!
I'd say that on this evidence, the 32-bit and multi-sector transfers are
of marginal benefit. The above doesn't really show clear wins. Does it?
Asus MB 512k with P100, 32Mb non-EDO ram.
-George
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