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<H2><A NAME="perf"></A> <A NAME="s4">4. $B@-G=$r>e$2$k$?$a$N%R%s%H(B</A></H2>
<P>
<P>$B%$!<%5%M%C%H$N%9%k!<%W%C%H$,Dc$$>l9g$d!"$"$k$$$O(B ftp $B$rMQ$$$?E>Aw(B
$BB.EY$r>/$7$G$b>e$2$k$?$a$K3hMQ$G$-$k%R%s%H$r=8$a$^$7$?!#(B
<P><CODE>ttcp.c</CODE> $B%W%m%0%i%`$OAG$N%9%k!<%W%C%H$rB,Dj$9$k$?$a$K$O$h$$(B
$B%F%9%H$G$9!#B>$N0lHLE*$JJ}K!$H$7$F$O(B <CODE>ftp> get large_file /dev/null</CODE>
$B$N<B9T$,$"$j$^$9!#$3$3$G$NBg$-$J%U%!%$%k(B(<CODE>large_file</CODE>) $B$H$O(B 1MB
$B0J>e$N%5%$%:$G!"$J$*$+$DAw?.B&%^%7%s$N%P%C%U%!>e$K;D$C$F$$$kI,MW$,(B
$B$"$j$^$9!#(B($B!V(Bget$B!W$r>/$J$/$H$b(B 2$B2s9T$J$$$^$9!#$J$<$J$i(B 1$B2sL\$GAw?.B&(B
$B%^%7%s$N%P%C%U%!$K%-%c%C%7%e$5$;$k$?$a$G$9!#(B)$B%P%C%U%!$K%-%c%C%7%e(B
$B$5$l$?%U%!%$%k$r;HMQ$9$k$N$O!"B,Dj7k2L$K%G%#%9%/$NFI$_9~$_B.EY$r(B
$B4^$a$J$$$?$a$G$9!#E>Aw$5$l$?%G!<%?$N<u?.@h$r%G%#%9%/$G$O$J$/(B
<CODE>/dev/null</CODE>$B$K$9$k$N$bF1MM$NM}M3$G$9!#(B
<P>
<H2><A NAME="ss4.1">4.1 $B35MW(B</A>
</H2>
<P>8 $B%S%C%H$N%+!<%I$G$5$(!"<!$+$i<!$X$H$d$C$F$/$k%Q%1%C%H$r$9$-4V$J$/<u?.(B
$B$9$k$3$H$,2DG=$G$9!#LdBj$H$J$C$F$/$k$N$O!"<!$K<u?.$9$k%Q%1%C%H$N$?$a$K(B
$B==J,$JM>M5$r:n$l$k$@$1$NB.$5$G%3%s%T%e!<%?$,%+!<%I$+$i%Q%1%C%H$r<h$j(B
$B=P$;$J$/$J$C$F$-$?>l9g$G$9!#%3%s%T%e!<%?$,4{$K<u?.$7$?%Q%1%C%H$r%+!<%I(B
$B>e$N%a%b%j$+$i$9$P$d$/<h$j=P$;$J$$>l9g!"%+!<%I>e$K$O<!$N%Q%1%C%H$r<u?.(B
$B$9$k$?$a$N>l=j$,$J$/$J$C$F$7$^$$$^$9!#(B
<P>$B$3$N>l9g!"%+!<%I$O?7$7$$%Q%1%C%H$r<h$j$3$\$9$+!"0JA0<u?.$7$?%Q%1%C%H$N(B
$B@hF,$K>e=q$-$7$F$7$^$$$^$9!#$I$A$i$N>l9g$b!"%Q%1%C%H$N:FAw$r0z$-5/$3$7(B
$B$?$jMW5a$9$k$3$H$K$J$j!"1_3j$J%G!<%?$NN.$l$N<YKb$K$J$C$F$7$^$$$^$9!#(B
$B$R$I$$>l9g$O!"@-G=$,M}O@CM$N(B 1/5 $B$K$J$C$F$7$^$&$3$H$b$"$j$^$9!#(B
<P>$B$h$jB?$/$N%a%b%j$rEk:\$7$F$$$k%+!<%I$O!"$h$jB?$/$N%Q%1%C%H$r!V%P%C%U%!(B
$B$9$k!W$3$H$,$G$-$^$9!#$=$N$?$a<!$+$i<!$H<u?.$7$?%Q%1%C%H$r<h$j$3$\$9$3$H(B
$B$J$/O"B3$7$F<h$j07$&$3$H$,$G$-$^$9!#$3$l$O5U$K!"%Q%1%C%H$N<h$j$3$\$7$r(B
$BKI$0$?$a$N!"%P%C%U%!$+$i%Q%1%C%H$r<h$j=P$9$N$KI,MW$J%3%s%T%e!<%?$NBT$A(B
$B;~4V$,C;$/$F:Q$`$H$$$&$3$H$r0UL#$7$^$9!#(B
<P>
<P>$B$[$H$s$I$N(B 8 $B%S%C%H%+!<%I$O(B 8kB $B$N%P%C%U%!$r;}$C$F$$$F!"(B16 $B%S%C%H$N%+!<(B
$B%I$O(B 16kB $B$N%P%C%U%!$r;}$C$F$$$^$9!#$[$H$s$I$N(B Linux $B$N%I%i%$%P$O%P%C(B
$B%U%!$N$&$A(B 3kB $B$r(B(2$B$D$NAw?.%P%C%U%!$N$?$a$K(B)$BJ]B8$7$F$$$^$9!#$=$N$?$a(B
8 $B%S%C%H%+!<%I$K$D$$$F$O<u?.MQ$K(B 5kB $B$@$1$,;D$C$F$$$^$9!#$3$l$O%U%k%5(B
$B%$%:(B(1500$B%P%$%H(B)$B$N%$!<%5%M%C%H%Q%1%C%H$r(B 3 $B$D<u?.$9$k$@$1$J$i==J,$JNL(B
$B$G$9!#(B
<P>
<H2><A NAME="ss4.2">4.2 ISA $B%+!<%I$H(B ISA $B%P%9$N%9%T!<%I(B</A>
</H2>
<P>$B>e=R$N$h$&$K!"%Q%1%C%H$,%+!<%I$+$i==J,B.$/<h$j=P$5$l$F$$$l$P!"<u?.(B
$B$9$k%Q%1%C%HMQ$N%P%C%U%!$,>.$5$/$F$b%Q%1%C%H$N<h$j$3$\$7$d%*!<%P!<%i%s(B
$B$O5/$3$j$^$;$s!#%+!<%I$+$i%3%s%T%e!<%?$N%a%b%j$X%Q%1%C%H$,<h$j=P$5$l$F(B
$B$$$/B.EY$r7hDj$9$kMWAG$O!"%+!<%I$H%a%b%j$N(B 2$B$D$r7k$V7PO)!"$9$J$o$A(B
ISA$B%P%9>e$N%G!<%?E>AwB.EY$G$9!#(B(CPU$B$,HsNO$J(B 386SX-16MHz $B$J$i!"$3$l$b(B
$BB.EY$K1F6A$rM?$($^$9!#(B)
<P>$B?d>)$5$l$F$$$k(B ISA $B%P%9$N%/%m%C%/?t$O$*$h$=(B 8MHz $B$G$9$,!"B?$/$N%^%6!<(B
$B%\!<%I$H<~JUAuCV$O$=$l$h$jB.$$<~GH?t$GF0:n$9$k$3$H$,2DG=$G$9!#(BISA $B%P%9(B
$B$N%/%m%C%/?t$ODL>o(B CMOS $B$N@_Dj$K$*$$$F9T$$!"%^%6!<%\!<%I$H(B CPU $B$N%/%m%C%/(B
$B?t$NLs?t$rA*Br$7$^$9!#$?$@$7$$$/$D$+$N(B ISA $B$H(B PCI/ISA $B$N%^%6!<%\!<%I(B
$B$O$3$N%*%W%7%g%s$r;}$C$F$$$J$$$+$b$7$l$^$;$s!#$=$N>l9g$O9)>l=P2Y;~$N(B
$B@_Dj$r$=$N$^$^;H$&$3$H$K$J$j$^$9!#(B
<P>$BNc$H$7$F!"(BTTCP$B%W%m%0%i%`$rMQ$$$FB,Dj$7$?7k2L$r0J2<$K<($7$^$9!#$3$l$O(B
40MHz$B$N(B 486$B$K8E$$(B 8bit WD8003EP$B%+!<%I$r;HMQ$7$?$H$$$&>r7o$G!"(BISA$B%P%9(B
$B$NB.EY$rJQ$($F$$$^$9!#(B
<P>
<HR>
<PRE>
ISA $B%P%9B.EY(B (MHz) Rx TTCP (kB/s)
------------------- --------------
6.7 740
13.4 970
20.0 1030
26.7 1075
</PRE>
<HR>
<P>TCP/IP$B$r;HMQ$9$k8B$j$O!"(B<EM>$B$$$+$J$k(B</EM> 10MB/s $B$N%+!<%I$r;}$C$F$7$F$b(B
1075kB/s $B0J>e$NB.EY$r=P$9$N$OFq$7$$$G$7$g$&!#$7$+$7!"$I$s$J%7%9%F%`(B
$B$G$b(B ISA $B%P%9$,9bB.$GF0:n$9$k$H$O8B$j$^$;$s!#$[$H$s$I$N%7%9%F%`$G$O(B
13MHz $B0J>e$NB.EY$G$O@5>o$KF0:n$7$J$$$N$G$9!#(B($B$^$?!"$$$/$D$+$N(B PCI
$B%7%9%F%`$G$O(B ISA $B%P%9$NB.EY$,(B 8MHz$B$K8GDj$5$l$F$$$^$9!#$=$N$?$a%(%s%I(B
$B%f!<%6$,$=$l$rA}$d$9$3$H$O$G$-$^$;$s!#(B)
<P>$B9b$$E>AwB.EY$N$[$+$K$O!"%a%b%j$H%G%#%9%/$N(B I/O $BE>Aw%5%$%/%k$,C;$/$J$k(B
$B$3$H$K$h$C$F(B CPU $B;HMQN($r8:$i$;$k$H$$$&MxE@$b$"$j$^$9!#(B(ISA $B%P%9>e$N(B
$B%O!<%I%G%#%9%/$H%S%G%*%+!<%I$b!"(BISA $B%P%9$NB.EY$r>e$2$k$3$H$K$h$j@-G=$,(B
$B8~>e$7$^$9!#(B)
<P>ISA $B%P%9$NB.EY$r(B 8MHz $B$h$j9b$/$7$F$_$kA0$K!"I,$:%G!<%?$r%P%C%/%"%C%W$7(B
$B$F$/$@$5$$!#$=$7$F!"A4$F$N(B ISA $B<~JU5!4o$NB.EY$r8~>e(B
$B$5$;$?8e$G$b@5>o$KF0:n$9$k$3$H$rE0DlE*$K%F%9%H$7$F$/$@$5$$!#(B
<P>
<P>
<H2><A NAME="ss4.3">4.3 TCP $B<u?.%&%#%s%I%&$N@_Dj(B</A>
</H2>
<P>$B7+$jJV$7$K$J$j$^$9$,!"Ek:\$7$F$$$k(B RAM $B$,>/$J$$%+!<%I$H!"%3%s%T%e!<%?(B
$B$N%a%b%j$H%+!<%I4V$N%G!<%?E>AwB.EY$,CY$$%^%6!<%\!<%I$H$NAH$_9g$o$;$O!"(B
$B%H%i%V%k$N860x$H$J$j$^$9!#(BTCP $B<u?.%&%#%s%I%&$N=i4|CM$O(B 32kB $B$K$J$C$F(B
$B$$$^$9$,!"$3$l$OF1$8%5%V%M%C%H$KB8:_$9$k9bB.$J%3%s%T%e!<%?$,$h$I$_(B
$B$J$/(B 32kB $B$N%G!<%?$r%@%s%W$9$k$h$&$JB.$5$G%G!<%?$r<u?.$9$k$h$&$K8+$;(B
$B$+$1$k$?$a$G$9!#(B
<P>$B:G6a$N%P!<%8%g%s$N(B <CODE>route</CODE> $B%3%^%s%I$G$O!"<B9TCf$K$3$N%&%#%s%I%&$N(B
$B%5%$%:$r@_Dj$9$k$3$H$,$G$-$^$9!#DL>o$3$N%&%#%s%I%&$N%5%$%:$r8:$i$5(B
$B$J$1$l$P$J$i$J$$$N$O%m!<%+%k%M%C%H$N>l9g$@$1$G$9!#$J$<$J$i%k!<%?(B
$B$d%2!<%H%&%'%$$NFbB&$K0LCV$9$k%3%s%T%e!<%?$O!"LdBj$r0z$-5/$3$5$J$$(B
$BDxEY$K!V%P%C%U%!$5$l$F$$$k!W$+$i$G$9!#;HMQNc$H$7$F$O(B:
<P>
<HR>
<PRE>
route add <whatever> ... window <win_size>
</PRE>
<HR>
<P><CODE>win_size</CODE> $B$O;HMQ$7$?$$%&%#%s%I%&%5%$%:(B($B%P%$%HC10L(B)$B$G$9!#(BISA
$B%P%9>e$N(B 10MHz $B$+$=$l0J2<$GF0:n$7$F$$$k(B 8 $B%S%C%H$N(B 3c503 $B%+!<%I$O!"$*(B
$B$h$=(B 4kB $B$N%&%#%s%I%&%5%$%:$GNI9%$KF0:n$7$^$9!#0lJ}$G%&%#%s%I%&%5%$%:(B
$B$rBg$-$/$7$9$.$l$P%*!<%P!<%i%s$d%Q%1%C%H$N<h$j$3$\$7$r0z$-5/$3$7$+$M(B
$B$^$;$s!#$=$N7k2L%$!<%5%M%C%H$N%9%k!<%W%C%H$OCx$7$/Dc2<$7$F$7$^$$$^$9!#(B
$B@8$8$F$$$k<h$j$3$\$7$d%*!<%P!<%i%s$N>u67$O(B <CODE>cat /proc/net/dev</CODE>
$B$K$h$j%A%'%C%/$G$-$^$9!#(B
<P>
<H2><A NAME="ss4.4">4.4 NFS$B@-G=$N8~>e(B</A>
</H2>
<P>NFS$B%/%i%$%"%s%H$H$7$F(B 8 $B%S%C%H$N%+!<%I$r(B 8kB$B$N(B NFS$B%Q%1%C%H%5%$%:(B
(Sun $B=c@5(B)$B$G;HMQ$7$?>l9g$K!"4|BT$7$?$[$I$N@-G=$,=P$J$$$3$H$rH/8+$7$??M(B
$B$,$$$^$9!#(B
<P>$BM}M3$H$7$F9M$($i$l$k$N$O!"(B8 $B%S%C%H$H(B 16 $B%S%C%H$N%+!<%I$,Ek:\$7$F$$$k%P%C(B
$B%U%!%5%$%:$N0c$$$K$h$k$b$N$G$7$g$&!#%$!<%5%M%C%H%Q%1%C%H$N:GBg%5%$%:$O(B
$B$*$h$=(B 1500 $B%P%$%H$G$9!#(B8kB$B$N(B NFS $B%Q%1%C%H$,(B 6 $B8D$NO"B3$7$?:GBg%5%$%:(B
$B$N%$!<%5%M%C%H%Q%1%C%H$H$7$F$d$C$F$-$?$H$7$^$9!#(B8 $B%S%C%H$G$b(B 16 $B%S%C%H(B
$B$G$b%+!<%I$,O"B3$7$?%Q%1%C%H$r<u?.$9$k$N$OLdBj$"$j$^$;$s!#LdBj$O%+!<%I(B
$B$N%P%C%U%!$+$i%Q%1%C%H$,=g<!<h$j=P$5$l$F$$$+$J$/$J$C$?$H$-$K@8$8$^$9!#(B
$B%P%C%U%!$,$"$U$l$F$7$^$&$N$G$9!#(B8 $B%S%C%H%+!<%I$,E>Aw$4$H$KM>J,$J(B ISA
$B%P%9%5%$%/%k$rI,MW$H$9$k$N$b:$$j$b$N$G$9!#(B8 $B%S%C%H%+!<%I$r;HMQ$7$F$$$k(B
$B>l9g$N2r7h:v$O!"(BNFS $B$NE>Aw%5%$%:$r(B 2kB($B$b$7$/$O(B 1kB)$B$K$9$k$+!"(BISA$B%P%9(B
$B$NB.EY$r>e$2$F%+!<%I$N%P%C%U%!$+$i%Q%1%C%H$r<h$j=P$9$H$3$m$r9bB.$K$9$k(B
$B$+!"$N$I$A$i$+$G$9!#;d$N<B83$G$O!"(B8MHz$B$GF0:n$9$k8E$$(B WD8003E $B%+!<%I$G(B
$B$b!"%7%9%F%`$K$=$NB>$NIi2Y$,$J$$>l9g$K$O(B 2kB $B$H$$$&Bg$-$J(B NFS $B$NE>Aw%5(B
$B%$%:$G$N<u?.$,2DG=$G$7$?!#$7$+$7(B 4kB $B$G$O!"@-G=$,$[$\(B 1/3 $B$KDc2<$7$F$7(B
$B$^$$$^$9!#(B
<P>$B0lJ}$G!">/$J$/$H$b(B 16 $B%S%C%H$N(B ISA$B%+!<%I$r;H$C$F$$$F!"%^%&%s%H%*%W%7%g%s(B
$B$GE>Aw%5%$%:$N=i4|CM$,(B 1kB $B$K$J$C$F$$$k>l9g$O!"E>Aw%5%$%:$r(B 4kB ($B$b$7$/$O(B
8kB) $B$K@_Dj$9$k$3$H$K$h$C$F!"@-G=$N8~>e$,4|BT$G$-$^$9!#(B
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