Date: Sun, 9 Nov 1997 16:38:52 -0500 (GMT) From: Kapil Chowksey <kchowksey@hss.hns.com> To: FreeBSD-gnats-submit@FreeBSD.ORG Subject: kern/4989: NE2100 ethernet card (lnc1) gives poor performance. Message-ID: <199711092138.QAA06504@tarang.hss.hns.com> Resent-Message-ID: <199711091120.DAA02308@hub.freebsd.org>
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>Number: 4989 >Category: kern >Synopsis: NE2100 ethernet card (lnc1) gives poor performance. >Confidential: no >Severity: non-critical >Priority: medium >Responsible: freebsd-bugs >State: open >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Sun Nov 9 03:20:01 PST 1997 >Last-Modified: >Originator: Kapil Chowksey <kchowksey@hss.hns.com> >Organization: hss >Release: FreeBSD 2.2.5-RELEASE i386 >Environment: FreeBSD ensatm1.hss.hns.com 2.2.5-RELEASE FreeBSD 2.2.5-RELEASE #0: Tue Oct 21 14:33:00 GMT 1997 jkh@time.cdrom.com:/usr/src/sys/compile/GENERIC i386 >Description: NE2100 ethernet card (on an HP Vectra Pentium class CPU) running FreeBSD 2.2.5-RELEASE with 10Mbps ethernet is giving very poor performance (about 4 Kbps ftp transfers). This is happening only in post-install operation -- single user as well as multi-user mode. During installation (which was done in ftp mode using an ftp server on local ethernet), the performance was normal (about 400 Kbps ftp transfers). A tcpdump shows that FTP transfers a chunk of data, waits for *two seconds*, then transfers a chunk ... and so on. 16:36:48.167449 elbereth.40051 > kchowksey.ftp-data: . ack 12960 win 17280 <nop ,nop,timestamp 9423 22459,nop,nop,[|tcp]> (DF) [tos 0x8] 16:36:48.167599 elbereth.40051 > kchowksey.ftp-data: . ack 12960 win 17280 <nop ,nop,timestamp 9423 22459,nop,nop,eol,[|tcp]> (DF) [tos 0x8] 16:36:49.641186 kchowksey.ftp-data > elbereth.40051: . 12960:14400(1440) ack 1 win 17280 <nop,nop,timestamp 22461 9423,nop,nop,[|tcp]> (DF) [tos 0x8] 16:36:49.644203 elbereth.40051 > kchowksey.ftp-data: . ack 17280 win 12960 <nop ,nop,timestamp 9426 22461,nop,nop,eol,[|tcp]> (DF) [tos 0x8] 16:36:49.644353 elbereth.40051 > kchowksey.ftp-data: . ack 17280 win 17280 <nop ,nop,timestamp 9426 22461,nop,nop,[|tcp]> (DF) [tos 0x8] >How-To-Repeat: Do a reasonably sustained ftp transfer on a NE2100 card. transfer rates are abyssimally low. >Fix: >Audit-Trail: >Unformatted:
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