kern/86124: dell 1850 pro/1000 slow

[Hans Middelhoek]

>Number:         86124
>Category:       kern
>Synopsis:       dell 1850 pro/1000 slow
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Wed Sep 14 14:10:07 GMT 2005
>Closed-Date:
>Last-Modified:
>Originator:     Hans Middelhoek
>Release:        5.4
>Organization:
Odon Internet
>Environment:
FreeBSD *****.odon.nl 5.4-RELEASE-p6 FreeBSD 5.4-RELEASE-p6 #0: Tue Aug 30 14:02:28 CEST 2005     ***@*****.odon.nl:/usr/obj/usr/src/sys/ODON-SMP  i386
>Description:
A new installation of freebsd 5.4 or earlier works fine, no problem at all. But when we patch the kernel (p5 or p6, possibly also older patches), the problem occurs that the network interface card is getting slow.
Ping responses are very unstable:
64 bytes from ip.ad.dr.ess: icmp_seq=0 ttl=64 time=7.062 ms
64 bytes from ip.ad.dr.ess: icmp_seq=1 ttl=64 time=2.780 ms
64 bytes from ip.ad.dr.ess: icmp_seq=2 ttl=64 time=0.566 ms
64 bytes from ip.ad.dr.ess: icmp_seq=3 ttl=64 time=3.358 ms
64 bytes from ip.ad.dr.ess: icmp_seq=4 ttl=64 time=3.407 ms
64 bytes from ip.ad.dr.ess: icmp_seq=5 ttl=64 time=0.322 ms
64 bytes from ip.ad.dr.ess: icmp_seq=6 ttl=64 time=3.365 ms
64 bytes from ip.ad.dr.ess: icmp_seq=7 ttl=64 time=3.285 ms
64 bytes from ip.ad.dr.ess: icmp_seq=8 ttl=64 time=2.952 ms
This is in the local network.
Maximum download speed seen: 4519 kBps
Sometimes it's only 2000 kBps. Without the patches 11MBps is measured.

Part of /var/log/dmesg:
em0: <Intel(R) PRO/1000 Network Connection, Version - 1.7.35> port 0xecc0-0xecff mem 0xdfae0000-0xdfafffff irq 64 at device 7.0 on pci6
em0: Ethernet address: 00:00:00:00:00:00
em0:  Speed:N/A  Duplex:N/A
......
em0: Link is up 100 Mbps Full Duplex

It are Dell 1850 dual XEON server. It's not happening on only one server, but on all of our Dell 1850's.

---------------------
At last, we also have Dell 750's, same controller (pro/1000) and em driver without having the same problem.
Information about that one:
uname -a:
FreeBSD hostname.odon.nl 5.4-RELEASE-p6 FreeBSD 5.4-RELEASE-p6 #1: Tue Aug 16 15:22:45 CEST 2005     *****@hostname.*****.nl:/usr/obj/usr/src/sys/KERNEL  i386

dmesg part:
em0: <Intel(R) PRO/1000 Network Connection, Version - 1.7.35> port 0xece0-0xecff mem 0xfe2e0000-0xfe2fffff irq 18 at device 1.0 on pci1
em0: Ethernet address: 00:00:00:00:00:00
em0:  Speed:N/A  Duplex:N/A
em0: Link is up 100 Mbps Full Duplex
-------------------------
>How-To-Repeat:
I don't know. It occurs on a Dell 1850 with a Intel pro/1000 network interface card after patching the (default) kernel.
>Fix:
      
>Release-Note:
>Audit-Trail:
>Unformatted: