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Date: Mon, 30 Jun 2003 17:14:56 +0800 (HKT)
From: ktso@cuhk.edu.hk
Reply-To: ktso@cuhk.edu.hk
To: FreeBSD-gnats-submit@freebsd.org
Cc: ktso@cuhk.edu.hk
Subject: sluggish TCP connection
X-Send-Pr-Version: 3.113
X-GNATS-Notify:

>Number:         53920
>Category:       kern
>Synopsis:       [bge] sluggish TCP connection
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    andre
>State:          closed
>Quarter:        
>Keywords:       
>Date-Required:  
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Mon Jun 30 02:20:19 PDT 2003
>Closed-Date:    Sun May 13 04:26:08 GMT 2007
>Last-Modified:  Sun May 13 04:26:08 GMT 2007
>Originator:     KT So
>Release:        FreeBSD 5.1-RELEASE i386
>Organization:
ITSC, CUHK
>Environment:
System: FreeBSD chameleon.itsc.cuhk.edu.hk 5.1-RELEASE FreeBSD 5.1-RELEASE #0: Thu Jun 5 02:55:42 GMT 2003 root@wv1u.btc.adaptec.com:/usr/obj/usr/src/sys/GENERIC i386
	Dell Poweredge 2650 with builtin Broadcom GE NIC
>Description:
	The FreeBSD server 137.189.192.36 is connected to Internet using the builtin Broadcom GE NIC.  So, the bge driver is used.  We are running an INN server and we used another news server to feed a large batch of old news into it.  We notice that the TCP connection is sometimes sluggish.  Further investigation showed that the machine is still pingable and new TCP connection can be established when those existing TCP connection become sluggish for a few seconds.  You may have a look at the attached tcpdump file.  I have telnet to the remote host 137.189.192.36 from 137.189.28.103.  I have tried to type the string "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrst" when the TCP connection is sluggish.  Those characters "abcdef..." are not echoed immediately.  However, ACK was sent immediately after each character is received by the remote host.  When the news feeding is stopped, the TCP connections were no longer sluggish.  We have similar problem in FreeBSD 4.5.  The problem was m!
 ore serious and we can find messages like "watchdog timeout" from the log.
>How-To-Repeat:
	Feed a batch of news articles to the FreeBSD server with Broadcom GE NIC.  Then monitor any TCP connection like SSH, telnet, etc.  Sometimes the problem does not exist after the machine is warmed up.  After a reboot, the problem happen again.
>Fix:


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end


>Release-Note:
>Audit-Trail:
Responsible-Changed-From-To: freebsd-bugs->andre 
Responsible-Changed-By: andre 
Responsible-Changed-When: Sat Dec 27 08:46:51 PST 2003 
Responsible-Changed-Why:  
Take over. 

http://www.freebsd.org/cgi/query-pr.cgi?pr=53920 
State-Changed-From-To: open->feedback 
State-Changed-By: andre 
State-Changed-When: Tue Dec 30 04:36:26 PST 2003 
State-Changed-Why:  
Problem believed to be fixed.  Asked Originator to recheck. 

http://www.freebsd.org/cgi/query-pr.cgi?pr=53920 

From: Andre Oppermann <oppermann@pipeline.ch>
To: freebsd-gnats-submit@FreeBSD.org, ktso@cuhk.edu.hk
Cc:  
Subject: Re: kern/53920: sluggish TCP connection
Date: Tue, 30 Dec 2003 13:36:33 +0100

 So,
 
 could you please check again with 5.2RC2 or -CURRENT?
 
 This problem is believed to be fixed in sys/dev/bge/if_bge.c rev 1.49
 on Aug.10 2003.
 
 -- 
 Andre
 

From: SO Kwok Tsun <ktso@cuhk.edu.hk>
To: Andre Oppermann <oppermann@pipeline.ch>
Cc: freebsd-gnats-submit@FreeBSD.org, ktso@cuhk.edu.hk
Subject: Re: kern/53920: sluggish TCP connection
Date: Fri, 2 Jan 2004 18:16:16 +0800

 Dear Andre,
 
 Though the innd is not so stable after upgrading to 5.2RC2 (it switched to the
 state vmpfw finally), I can still manage to run a casual test.  As
 before, I use another news server to feed news to this server.  Then I
 ssh to it and run 'top' that refresh every 2 sec.  I can notice that the
 screen is sometimes frozen.  However, the symptom is improved a little
 bit already.  Thanks for your work.
 
 Regards,
 So K T, CUHK
 
 On Tue, Dec 30, 2003 at 01:36:33PM +0100, Andre Oppermann wrote:
 > So,
 > 
 > could you please check again with 5.2RC2 or -CURRENT?
 > 
 > This problem is believed to be fixed in sys/dev/bge/if_bge.c rev 1.49
 > on Aug.10 2003.
 > 
 > -- 
 > Andre
State-Changed-From-To: feedback->open 
State-Changed-By: remko 
State-Changed-When: Sun Nov 26 20:23:44 UTC 2006 
State-Changed-Why:  
Steal this PR from Andre to request additional feedback; 

http://www.freebsd.org/cgi/query-pr.cgi?pr=53920 
State-Changed-From-To: open->feedback 
State-Changed-By: remko 
State-Changed-When: Sun Nov 26 20:24:40 UTC 2006 
State-Changed-Why:  
Request for feedback: Dear submitter, a lot had been changed 
in the bge code by andre and others, can you please check 
whether this problem had been resolved all together now 
or? 

If there is no feedback; we need to close the PR due to 
lack of recent information. 

http://www.freebsd.org/cgi/query-pr.cgi?pr=53920 
State-Changed-From-To: feedback->closed 
State-Changed-By: linimon 
State-Changed-When: Sun May 13 04:25:44 UTC 2007 
State-Changed-Why:  
Feedback timeout. 

http://www.freebsd.org/cgi/query-pr.cgi?pr=53920 
>Unformatted:
