From owner-FreeBSD-users-jp@jp.freebsd.org  Wed Apr 15 10:10:02 1998
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Date: Wed, 15 Apr 1998 10:09:56 +0900
From: Hirohisa Mizuta <mizuta@bme.ei.hosei.ac.jp>
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Subject: [FreeBSD-users-jp 27246] Re: [Q] About transmit underflow
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$B?eED!wK!@/Bg$G$9!#(B

  On Mon, 13 Apr 1998 17:20:43 +0900 (JST), Subject: [FreeBSD-users-jp 27183] Re: [Q] About transmit underflow
  sada@ail-inc.co.jp (SADA Kenji) said:

sada> $B:n6HNL$,>/$J$$$+$i$H8@$C$FLdBj$O$J$$$N$G!"K:$l$J$$$&$A$K(B
sada> $BAw$C$F$7$^$&$3$H$r$*4+$a$7$^$9!#Aw$i$J$$$H(B QandA $B$K;D$j$^$;$s!#(B

$B$=$&$G$9$M!#(B
$B$H$$$&$3$H$G!"(BQandA	$B$K$7$F$_$^$7$?!#(B
$BFC$K;XE&$,F~$i$J$$$h$&$G$7$?$i!"(BQandA $B$KAw$j$^$9!#(B

------------ $B$3$3$+$i(B --------------
Q. DEC 2114x $B%A%C%W$N(B NIC $B$r;H$C$F$$$^$9$,(B
de0: abnormal interrupt: transmit underflow (raising TX threshold to 96|256)
de0: abnormal interrupt: transmit underflow (raising TX threshold to 8|512)
de0: abnormal interrupt: transmit underflow (raising TX threshold to 1024)
$B$H$$$&$h$&$J%a%C%;!<%8$,=P$^$9!#(B

A. $B$3$N%a%C%;!<%8$O!"(Bde $B%I%i%$%P$,!V(B2114x $B$,Aw?.%"%s%@!<%U%m!<3d$j9~$_$r(B
$BH/@8$7$?!W$3$H$r8!=P$7$?$H$$$&0UL#$G$9!#(B

$B7kO@$+$i@h$K8@$&$H!"LdBj$O(B($B$[$H$s$I(B)$B$"$j$^$;$s!#(B

$B$3$N!VAw?.%"%s%@!<%U%m!<3d$j9~$_(B(Transmit Underflow)$B!W$O(B 2114x $B$,(B
$BAw?.%G!<%?$r%a%$%s%a%b%j$+$i<h$C$F$-$F!"<+J,$N(B FIFO $B$K<h$j9~$_(B
$B%$!<%5%M%C%H$KAw?.$9$k2aDx$G!"<+J,$N(B FIFO $B$K<h$j9~$`%9%T!<%I$h$j$b(B
$B%$!<%5%M%C%H$KAw?.$9$k%9%T!<%I$,Aa$$$?$a$K(B FIFO $B$,6u$K$J$k$3$H$K$h$j(B
$BH/@8$7$^$9!#(B

$B$3$l$O!"(BPCI $B%P%9$NE>Aw%9%T!<%I$,CY$/!"%$!<%5%M%C%H$,$9$C$+$i$+$s(B
$B$N$H$-$K82Cx$K$J$j$^$9!#(B

$BAw?.%"%s%@!<%U%m!<3d$j9~$_$,H/@8$7$?>l9g!"$G$-$k$@$1<+J,$N(B FIFO $B$K(B
$B%G!<%?$rN/$a$F$+$iAw?.$r$9$k$h$&$K!"Aw?.%9%l%C%7%g%k%I$r$@$s$@$s(B
$BBg$-$/$7$^$9!#$3$l$,(B raising TX threshold to xxx $B$N0UL#$G$9!#(B

$B!t(B $B$A$J$_$K!"(Bxxx $B$N?t;z$O!"%W%m%0%i%`$N%_%9$G(B
$B!t(B 72|128$B!"(B96|256$B!"(B128|512$B!"(B160|1024
$B!t(B $B$H$J$k$N$,@5$7$$$h$&$G$9!#(B(/sys/pci/if_de.c $B$r8+$F$/$@$5$$!#(B)

$BAw?.%"%s%@!<%U%m!<$,@8$8$?:]$K$O!"$=$l$^$G(B FIFO $B$K(B
$BN/$^$C$F$$$?%G!<%?$^$G$7$+Aw=P$5$l$^$;$s!#(B
$B$7$?$,$C$F!"DL?.$NAj<j@h$G$O!"%$!<%5%Q%1%C%H$N:G8eHx$KIU2C$5$l$k$Y$-(B
CRC(Cyclic Redunduncy Check) $B$,IU$$$F$$$J$$>uBV$N%Q%1%C%H$H$_$J$5$l(B
$B<!$N$h$&$J(B bad crc $B$H$N%a%C%;!<%8$,I=<($5$l$^$9!#(B

de0: receive: xx:xx:xx:xx:xx:xx: bad crc

$BBP:v$H$7$F$O!":,K\E*$J2r7h$K$J$k$+$O$o$+$j$^$;$s$,!"$$$/$D$+$"$j$^$9!#(B

 1$B!%(BBIOS $B$N@_Dj%a%K%e!<$G(B PCI $B%P%9$N%l%$%F%s%7%?%$%^$rBg$-$/$7$F$_$k!#(B
 2$B!%(BPCI $B%P%9>e$G(B 2114x $B$NE>AwM%@h=g0L$r>e$2$k!#(B(BIOS $B$N2~B$$,I,MW$@$1$I(B)
 3$B!%(BPCI $B%P%9$K@\B3$7$F$$$kITMW$J%G%P%$%9$r8:$i$9!#(B($B$G$-$l$P(B...$B$@$1$I(B)
 4$B!%(BPCI $B%P%9$NE>AwB.EY$r>e$2$k!#(B($B5,3J30$N2~B$$,I,MW$@$1$I(B)
 5$B!%%$!<%5%M%C%H$KB>$N5!4o$r@\B3$7$F!"%$!<%5%M%C%H$r:.$^$;$k!#(B($B%$%_$J$7(B)
 6$B!%;~!9$X$s$J%Q%1%C%H$,%$!<%5%M%C%H>e$KAw?.$5$l$k$,5$$K$7$J$$!#(B

$BAw?.%"%s%@!<%U%m!<$,IQH/$7$J$$$N$G$"$l$P(B 6 $B$G$$$$$N$G$O$J$$$G$7$g$&$+(B?
1 $B$b5$5Y$aDxEY$N%A%e!<%K%s%0$G$7$+$"$j$^$;$s!#(B

