Re: ne2k-pci uncorrectly detecting collisions ?

From: backblue
Date: Wed May 05 2004 - 08:03:24 EST

I think that problem, it's because hardware, ne2k-pci NIC's and all realtek stuff, are chip NIC's that it's not suposed to use in that way, i have many problems like that, with realtek NIC's, but when i used real NIC's like 3com, you dont have any problems at all!
The realtek's NIC's starts complaining because another ones, they dont live well together! :)
Buy 3com nic's. :)

good luck

On Wed, 5 May 2004 14:35:32 +0200
Lucas Nussbaum <lucas@xxxxxxxxxxxxxxxxxx> wrote:

> Hello,
>
> I have experienced problem with the ne2k-pci driver. The symptoms were
> extremly poor performance with TCP. After some investigations, I believe
> it might be caused by problems with detecting collisions.
>
> I tested with 3 cards :
> - eth1 : RTL8029 - not working properly
> the chip says RTL8029, but lspci says RTL8029(AS)
> - eth2 : RTL8029AS - working.
> - eth3 : RTL8029AS - not working properly
> lspci for all three cards :
> 00:0b.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8029(AS)
>
> The same problem was experienced on FreeBSD, but it hurts a lot to say
> that there wasn't any problem when I tested under Windows - so it's
> probably not a broken card problem.
>
> All 3 NICs were in the same box, using the same ne2k-pci driver compiled
> as a module (kernel version is 2.4.24). They used the same 10/100 Hub to
> talk to the same NIC on the other end. Traffic on the network during the
> test was quite low but not nonexistent.
>
> As you can see :
> - throughput for eth1 and eth3 with TCP is extremly low.
> - throughput with UDP is normal.
> - eth1 and eth3 saw no collisions, but eth2 saw a lot.
> - eth1 and eth3 saw lots of frame errors, but eth2 saw much less.
>
> Here are the detailed test results. I can provide more results if needed.
> + ifconfig eth1 down
> + ifconfig eth2 down
> + ifconfig eth3 down
> + rmmod ne2k-pci
> + modprobe ne2k-pci
> + ifconfig eth1 172.36.1.2
> + ifconfig eth2 172.37.1.2
> + ifconfig eth3 172.38.1.2
> + netperf -H 172.36.1.1 -l 20
> TCP STREAM TEST to 172.36.1.1
> Recv Send Send
> Socket Socket Message Elapsed
> Size Size Size Time Throughput
> bytes bytes bytes secs. 10^6bits/sec
>
> 87380 16384 16384 20.18 0.59
> + netperf -H 172.37.1.1 -l 20
> TCP STREAM TEST to 172.37.1.1
> Recv Send Send
> Socket Socket Message Elapsed
> Size Size Size Time Throughput
> bytes bytes bytes secs. 10^6bits/sec
>
> 87380 16384 16384 20.04 8.54
> + netperf -H 172.38.1.1 -l 20
> TCP STREAM TEST to 172.38.1.1
> Recv Send Send
> Socket Socket Message Elapsed
> Size Size Size Time Throughput
> bytes bytes bytes secs. 10^6bits/sec
>
> 87380 16384 16384 20.05 0.56
> + netperf -t UDP_STREAM -H 172.36.1.1 -l 20 -- -m 1472
> UDP UNIDIRECTIONAL SEND TEST to 172.36.1.1
> Socket Message Elapsed Messages
> Size Size Time Okay Errors Throughput
> bytes bytes secs # # 10^6bits/sec
>
> 65535 1472 20.00 16027 0 9.44
> 65535 20.00 15216 8.96
>
> + netperf -t UDP_STREAM -H 172.37.1.1 -l 20 -- -m 1472
> UDP UNIDIRECTIONAL SEND TEST to 172.37.1.1
> Socket Message Elapsed Messages
> Size Size Time Okay Errors Throughput
> bytes bytes secs # # 10^6bits/sec
>
> 65535 1472 19.99 15326 0 9.03
> 65535 19.99 15326 9.03
>
> + netperf -t UDP_STREAM -H 172.38.1.1 -l 20 -- -m 1472
> UDP UNIDIRECTIONAL SEND TEST to 172.38.1.1
> Socket Message Elapsed Messages
> Size Size Time Okay Errors Throughput
> bytes bytes secs # # 10^6bits/sec
>
> 65535 1472 20.00 16008 0 9.43
> 65535 20.00 15593 9.18
>
> + netstat -i
> Table d'interfaces noyau
> Iface MTU Met RX-OK RX-ERR RX-DRP RX-OVR TX-OK TX-ERR TX-DRP TX-OVR Flg
> eth0 1500 0 140926 0 0 0 232637 0 0 0 BMRU
> eth1 1500 0 1049 0 0 0 17292 0 0 0 BMRU
> eth2 1500 0 7421 0 0 0 30134 0 0 0 BMRU
> eth3 1500 0 982 0 0 0 17201 0 0 0 BMRU
> lo 16436 0 22831 0 0 0 22831 0 0 0 LRU
> + ifconfig eth1
> eth1 Lien encap:Ethernet HWaddr 00:00:E8:D7:E9:46
> inet adr:172.36.1.2 Bcast:172.36.255.255 Masque:255.255.0.0
> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> RX packets:1049 errors:0 dropped:0 overruns:0 frame:165
> TX packets:17292 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 lg file transmission:1000
> RX bytes:75796 (74.0 KiB) TX bytes:26148738 (24.9 MiB)
> Interruption:5 Adresse de base:0xd800
>
> + ifconfig eth2
> eth2 Lien encap:Ethernet HWaddr 00:E0:7D:75:C2:D7
> inet adr:172.37.1.2 Bcast:172.37.255.255 Masque:255.255.0.0
> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> RX packets:7421 errors:0 dropped:0 overruns:0 frame:27
> TX packets:30134 errors:0 dropped:0 overruns:0 carrier:0
> collisions:225 lg file transmission:1000
> RX bytes:491544 (480.0 KiB) TX bytes:45590838 (43.4 MiB)
> Interruption:9 Adresse de base:0xdc00
>
> + ifconfig eth3
> eth3 Lien encap:Ethernet HWaddr 00:00:E8:74:0E:1A
> inet adr:172.38.1.2 Bcast:172.38.255.255 Masque:255.255.0.0
> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> RX packets:982 errors:0 dropped:0 overruns:0 frame:147
> TX packets:17201 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 lg file transmission:1000
> RX bytes:71062 (69.3 KiB) TX bytes:26010052 (24.8 MiB)
> Interruption:11 Adresse de base:0xe000
>
> Thank you,
> --
> | Lucas Nussbaum
> | lucas@xxxxxxxxxxxxxxxxxx lnu@xxxxxxx GPG: 1024D/023B3F4F |
> | jabber: lucas@xxxxxxxxxxxxxxxx http://www.lucas-nussbaum.net |
> | fingerprint: 075D 010B 80C3 AC68 BD4F B328 DA19 6237 023B 3F4F |
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