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From: Hidetoshi Shimokawa <simokawa@FreeBSD.org>
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$B2<@n$G$9(B.

At Thu, 9 Dec 2004 13:55:56 +0900,
Kouji Ito wrote:
> 
> $B?oJ,CY$/$J$C$F$7$^$$$^$7$?$,!"$h$&$d$/;n83$r9T$&;v$,=PMh$^$7$?!#(B
> 
> 
> $B;n83$r9T$C$?4D6-$O!"(B
> $B%^%7%s(BA$B!JAw?.B&!K(B
> HP$B!!(BDL$B#3#8#0(BG$B#3(B(CPU Xeon2.8GHz$B!_#1(B $B%a%b%j#2!%#5(BG)
> Intel PRO/1000MT Quad Port Server Adapter
> FreeBSD5.3-RELEASE
> $B%+!<%M%k$K$O!"(BSMP,KDB,DDB,GDB,DEBUG=-g$B$r$D$1$F$"$j$^$9!#(B
> if_em.c $B$O!"(B1.44.2.2 2004/10/15

$B$3$A$i$b(B 1.44.2.4 $B$K>e$2$F$b2~A1$7$J$$$G$7$g$&$+(B?
1.44.2.3 $B$NJQ99$O(B, $BAw?.$N:]$K$h$j1F6A$,Bg$-$$$H;W$&$N$G$9$,(B.

> $B%^%7%s(BA# ./netsend machine-B 10000 150 3000000 43200
> $B%^%7%s(BB# ./netreceive 10000

$B$3$l$O$I$&$$$&%F%9%H$J$s$G$7$g$&$+(B?

> $B46A[(B
> MTU$B#1#5#0#0$G$"$l$P(BSTABLE$B$N(Bem$B%I%i%$%P$O==J,0BDj$7$F$$$k$h$&$K8+$($^$9!#(B
> $B$A$g$C$H5$$K$J$k$N$,!"%9%k!<%W%C%H!#(B
> $B;n83#3$G!"%$%s%?!<%U%'!<%9$"$?$j#4#3(BMB$B!"#3%Q%i$@$+$i#3G\$7$FLs#1#2#0(BMB$B!#(B
> GigaBit$B$N(BNIC$B#3$DJ,$K$7$F$O$A$g$C$H>/$J$$$+$J$H;W$$$^$9!#(B
> $B$3$N%^%7%s$O!"%*%s%\!<%I(BNIC$B$H$7$F!"$5$i$K#2$D$N(BGigaBitLAN$B$r;}$C$F$$$^$9!#(B(bge$B%G%P%$%9$G$9!#(B)
> $B;n83#3(B+bge0$B$K$bIi2Y$r$+$1$F$_$?$H$3$m!"(Bsystat -ifstat $B>e$G$O!"#3#0(BMB/s$B$,#4$D$H(B
> $BI=<($5$l$^$7$?!#!J%H!<%?%k$G$O$d$C$Q$j#1#2#0(BMB/s$BDxEY$K$J$k!K(B
> $B$3$N%^%7%s$G$N%M%C%H%o!<%/@-G=!J%Q%1%C%H$N<u?.$K4X$7$F!K$OKhIC#1#2#0(BMB$B$GF,BG$A$NMM$G$9!#(B
> $B%P%9$d%a%b%j$,%\%H%k%M%C%/$K$J$k$K$O!"$^$@$^$@$@$H;W$&$N$G$9$,!"2?$,%\%H%k%M%C%/$K(B
> $B$J$C$F$$$k$N$G$7$g$&!)(B

$B<B:]$N$H$3$m$I$&$J$N$+J,$j$^$;$s$,(B.

- tcp window size $B$J$I$N(B buffer size $B$N(B tuning.
- sendfile(2) $B$J$I$r;H$C$F(B, memory copy $B$d(B context switch $B$r8:$i$9(B.

$B$J$I$9$k$H(B, $B2~A1$9$k$+$b$7$l$^$;$s(B.

/\ Hidetoshi Shimokawa
\/  simokawa@FreeBSD.org
