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To: FreeBSD-net-jp@jp.FreeBSD.org
From: TOMITA Yoshinori <yoshint@flab.fujitsu.co.jp>
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Subject: [FreeBSD-net-jp 3555] fxp =?ISO-2022-JP?B?GyRCJHIbKEI=?= 10Base-T
 =?ISO-2022-JP?B?GyRCJE4lQCVgGyhC?= HUB
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$BIYED$H$$$$$^$9!#(B

10Base-T$B$K$D$J$,$C$F$$$k(Bfxp$B$G!"DL?.Aj<j$K$h$C$F$O!"6KC<$KDL?.B.EY$,CY(B
$B$/$J$j(B(collision$B$bB?H/$7$F$$$k(B)$B!"!)!)!)$J>u67$,H/@8$7$F:$$C$F$$$^$9!#(B

TCP/IP$B$N:Y$+$$$3$H$O$<$s$<$s$h$/$o$+$C$F$$$J$$$N$G!"$H$s$A$s$+$s$J$3$H(B
$B$r$$$C$F$k$+$b$7$l$^$;$s$,!"D9$/$J$j$^$9$1$I!"$o$+$C$F$$$k$3$H$r!"0J2<(B
$B$K$:$i$:$i$HNs5s$7$^$9!#(B




4.5-STABLE-20020214-JPSNAP$B$r%$%s%9%H!<%k$7!"(B

fxp0: <Intel Pro 10/100B/100+ Ethernet> port 0xe400-0xe43f mem 0xe8000000-0xe80fffff,0xe8118000-0xe8118fff irq 3 at device 9.0 on pci0

$B$HG'<1$5$l$k(BNIC$B$r$D$+$C$F$$$F(B(IRQ$B$N=EJ#$J$7(B)$B!"(B

# ifconfig fxp0
fxp0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
        inet $B$&$s$?$i(B netmask 0xffffff00 broadcast $B$+$s$?$i(B
        inet6 $B$"$l$l(B%fxp0 prefixlen 64 scopeid 0x1 
        ether $B$3$l$l(B
        media: Ethernet autoselect (10baseT/UTP)
        status: active

$B%@%`(BHub$B$K$D$J$$$G$$$k%^%7%s!V(BX$B!W$,$"$k$N$G$9$,!"6KC<$KDL?.B.EY$,CY$/$J(B
$B$k$3$H$,$"$j$^$9!#(B

/usr/bin/ftp$B!"(Bports/benchmarks/netperf$B$G4Q;!$7$?$H$3$m!"(B

1) $BLdBj$N(BX $B"*%P%+(BHub$B"*!D"*%9%$%C%A%s%0%O%V"*$=$NB>$N(BFreeBSD$B$d(BLinux$B$d(BSolaris

$B$NE>AwB.EY$O!"(B10Base-T$B$J$j$NB.EY$,$G$F$$$k$N$G$9$,!"5UJ}8~$N(B

2) $B$=$NB>$N(BFreeBSD$B$d(BLinux$B$d(BSolaris$B"*%9%$%C%A%s%0%O%V"*!D"*%P%+(BHub$B"*LdBj$N(BX

$B$NE>AwB.EY$O!"$R$I$$$H$-$O!"(B1$B$N>l9g$N(B1/10$B$/$i$$$K$J$C$F$7$^$$$^$9!#(BNFS
$B$b!"(Bls$B%3%^%s%I$N7k2L$,$G$k$^$G$"$-$l$k$[$ICY$/$J$C$F$$$^$9!#(B

# $B$9$Y$F$N%^%7%s$O!"O@M}E*$K$O(B1$B$D$N%M%C%H%o!<%/%;%0%a%s%H$K$D$J$,$C$F(B
# $B$$$F!"%k!<%?$O2p$7$F$$$^$;$s(B

netperf$B$NCM$@$H!"(B1$B$NJ}8~$O!"(B5.83$B!A(B9.02Mbps$B$/$i$$$G$k$N$K!"(B2$B$NJ}8~$O!"(B

X$B$NAj<j$,(BFreeBSD$B$N>l9g(B($B$3$l$b(Bfxp)$B!'(B 0.62$B!A(B0.64Mbps
X$B$NAj<j$,(BSPARC Solaris$B$N>l9g(B     $B!'(B 2.82$B!A(B7.62Mbps


ports/benchmarks/netpipe$B$N(BNPtcp$B$G!"!V%a%C%;!<%8%5%$%:!W(B(write()$B$9$kC1(B
$B0L$N$3$H$+!)(B)$B$rJQ2=$5$;$F;n$7$?$H$3$m!"(B

        4344$B$N$H$-!"(B7.80Mbps$BDxEY(B
        4355$B$N$H$-!"(B0.25Mbps$BDxEY(B

$B$H$$$&6-L\$,$_$D$+$j$^$7$?!#(B

# $B",$3$N$H$-(BX$B$NAj<j$O(BFreeBSD$B$G$7$?$,!"(BLinux$B$KAj<j$r$5$;$k$H!"CY$/$J$k(B
# $B$b$N$N!"$=$l$G$b!"(B1$B!A(B3Mbps$B$/$i$$$O$G$F$$$?(B


MTU=1500$B!"(BIP$B%X%C%@D9(B=20$B!"(BTCP$B%X%C%@D9(B=32$B$KCmL\$9$k$H!"(B

        (1500-20-32)*3 = 4344

$B$H!"$$$+$K$b0UL#$"$j$2$JCM$J$N$G$9$,!"$?$a$7$K(BMTU$B$r(B1400$B$K$7$F$_$k$H!"(B
NPtcp$B$G$N6-L\$O(B4044$B$K$J$j$^$7$?!#(B

        (1400-20-32)*3 = 4044


$B$J$*!"%^%7%s(BX$B$N7R$.@h$r!"(B10/100M$B$N%9%$%C%A%s%0%O%V$KJQ99$7!"(BX$B$N(Bfxp$B$r(B
100 full-duplex$B$GF0$+$9$H!"$^$C$?$/LdBj$J$/!"$=$l$J$j$NDL?.B.EY$K$J$j(B
$B$^$9!#(B


$B$J$s$H$J$/!"(Bsysctl$B$G!"(Bnet.inet.tcp.delacktime$B$d(Bnet.inet.tcp.recvspace
$B$r$$$8$C$F$_$?$N$G$9$,!"JQ2=$O$^$C$?$/$*$-$F$$$J$5$=$&$G$7$?!#(B

$BG<F@$$$+$J$$$N$O!"(B($B$3$l$^$G$o$+$C$F$$$kCf$G$O(B)$B!V(B100 full-duplex
FreeBSD $B"*(B $B%^%7%s(BX$B!W$NJ}8~$NDL?.$@$1!"6KC<$KCY$/$J$k!#(B
# $B$I$&$b!"(BFreeBSD << x86 Linux <<< SPARC Solaris $B$H$$$&=g!#(B
# $B%W%m%;%C%5!"(BI/O$B$N@-G=$O!"$I$l$b(B1$B7e$bJQ$o$i$J$$$@$m$&$H;W$o$l$k(B



$B0J>e$N$h$&$J>u67$J$N$G$9$,!"2?$+%"%I%P%$%9$r$$$?$@$1$k$H$"$j$,$?$$$N$G(B
$B$9$,!D(B


-- 
---
TOMITA Yoshinori  $B"O"]!*'j'`"]!?'d!;'.&)&S'Q(B $B'5&O"f'_&)'*"~'A(-(B
(Fujitsu Laboratories Ltd., Kawasaki, Japan)
