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Date: Fri, 07 Aug 1998 16:43:45 -0800
To: FreeBSD-users-jp@jp.freebsd.org
From: Tadashi Takahashi <tadashi@best.com>
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X-Sequence: FreeBSD-users-jp 31601
Subject: [FreeBSD-users-jp 31601] IDE DMA access benchmark
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FreeBSD current $B$G(J IDE $B$N(J DMA $BE>Aw%Y%s%A%^!<%/$r$d$C$F$_$^$7$?!#(J
DMA $BE>Aw(J ON $B$@$H0J2<$N$h$&$K%Y%s%A%^!<%/>e$O(J3$BG\$/$i$$B.$/$J$C$F$$$^$9!#(J
$B%^%7%s$O(J Dell Dimension XPS R400 (Memory 128MB) $B$G$9!#(J

DMA $BE>Aw(J ON 

wdc0: unit 0 (wd0): <Maxtor 91152D8>, DMA, 32-bit, multi-block-16
wd0: 10991MB (22510656 sectors), 22332 cyls, 16 heads, 63 S/T, 512 B/S

----- bonnie $B$N7k2L(J (DMA $BE>Aw(J ON) ------
              -------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
FreeBSD-  256 10296 52.3  9602 16.6  4094  7.2 11865 59.2 11952 11.5 134.6
1.5

----- iozone $B$N7k2L(J (DMA $BE>Aw(J OFF) ------
Writing the 256 Megabyte file, 'iozone.tmp'...26.031250 seconds
Reading the file...22.210938 seconds

IOZONE performance measurements:
        10312046 bytes/second for writing the file
        12085732 bytes/second for reading the file


DMA $BE>Aw(J OFF $B$@$H(J
wdc0: unit 0 (wd0): <Maxtor 91152D8>
wd0: 10991MB (22510656 sectors), 22332 cyls, 16 heads, 63 S/T, 512 B/S

----- bonnie $B$N7k2L(J (DMA $BE>Aw(J OFF) ------
              -------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
FreeBSD-  256  3113 17.1  3419  5.8  1693  3.6  3311 17.1  3769  4.6 114.3
1.3

----- iozone $B$N7k2L(J (DMA $BE>Aw(J OFF) ------
Writing the 256 Megabyte file, 'iozone.tmp'...83.148438 seconds
Reading the file...72.187500 seconds

IOZONE performance measurements:
        3228388 bytes/second for writing the file
        3718586 bytes/second for reading the file


$B$@$1$I$"$/$^$G%Y%s%A%^!<%/>e$NCM$G$9!#(JFreeBSD $B$N%j%S%k%I$J$I$N<B:n6H(J
$B$G$O(J 5% $B$/$i$$$7$+B.$/$J$j$^$;$s$G$7$?!#(J
   
  make -j3 -DNOCLEAN world $B$N<B9T;~4V(J
     DMA $BE>Aw(J ON         48:54
     DMA $BE>Aw(J OFF        51:13

tadashi@best.com

