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To: FreeBSD-users-jp@jp.freebsd.org, mino@bb.imagica.co.jp
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Message-Id: <19991207175624E.simokawa@sat.t.u-tokyo.ac.jp>
Date: Tue, 07 Dec 1999 17:56:24 +0900
From: Hidetoshi Shimokawa <simokawa@sat.t.u-tokyo.ac.jp>
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$B2<@n$G$9(B.

mino>  $B$"$!!"$=$l$O$$$1$^$;$s!#(B
mino>  $BNc$($P!";d$N;n$7$?4D6-$G!"%$%s%?!<%j!<%V%U%!%/%?$O!"$?$C$?(B
mino> $B0l$D$NFCDj$NCM$N;~$@$1C1BN$N%G%#%9%/$h$j@-G=$,>e$,$j$^$7$?!#(B
mino> 
mino>  $B$=$l0J30$NCM$G$O%7!<%/@-G=$bE>Aw%l!<%H$bC1BN%G%#%9%/$r2<2s$C(B
mino> $B$F$7$^$$$^$7$?!#(B
mino>  1 $B$+$i(B 128 $B$/$i$$$^$G!"FsF|$,$+$j$/$i$$$GD4$Y$k1)L\$K!#(B
mino> 
mino> # $B$3$NCM$OEvA3!"%O!<%I%&%'%"4D6-0MB8!#$@$+$i5s$2$^$;$s(B

$B$G$b(B, $B$"$kDxEY$O;29M$K$J$k$N$G$O$J$$$G$7$g$&$+(B.
block device $B$N(B physio $B$N:GBgCM$,(B 64KB $B$@$+$i(B. $B$=$l$h$j$O(B
$BBg$-$/$7$F$*$$$?$[$&$,NI$$$h$&$J5$$,$7$^$9(B.
vimnum(8) $B$N(B man page $B$N(B "Performance considerations" $B$K(B
$B$"$kDxEY$N0lHLO@$,=q$$$F$"$j$^$9(B. ccd $B$G$b$=$&JQ$i$J$$$H(B
$B;W$$$^$9$,(B, $B$I$s$J$b$s$G$7$g$&$+(B?

mino>  ccd(4) $B$O7k9=(B CPU $B$r6t$C$F$$$k$h$&$K8+$($k$N$G!"<B$O$3$NJU(B
mino> $B$j$N%A%e!<%K%s%0$O7k9=Fq$7$$LdBj$r$O$i$s$G$$$k$h$&$J5$$,!#(B

$B$"$kDxEY$N(Bspeed$B$K$J$C$F$/$k$H(B, memory $B$N(B bandwidth $B$,(B bottleneck
$B$K$J$C$F$-$^$9(B. $B$=$&$9$k$H(B, CPU $B$N(B idle$B;~4V$,>/$J$/$J$C$F$-$^$9(B.

/\ Hidetoshi Shimokawa
\/  simokawa@sat.t.u-tokyo.ac.jp
PGP public key: finger -l simokawa@sat.t.u-tokyo.ac.jp
