Re: [E1000-devel] e1000 1sec latency problem

From: Kok, Auke
Date: Thu Feb 07 2008 - 13:22:37 EST


Pavel Machek wrote:
> Hi!
>
> I have the famous e1000 latency problems:
>
> 64 bytes from 195.113.31.123: icmp_seq=68 ttl=56 time=351.9 ms
> 64 bytes from 195.113.31.123: icmp_seq=69 ttl=56 time=209.2 ms
> 64 bytes from 195.113.31.123: icmp_seq=70 ttl=56 time=1004.1 ms
> 64 bytes from 195.113.31.123: icmp_seq=71 ttl=56 time=308.9 ms
> 64 bytes from 195.113.31.123: icmp_seq=72 ttl=56 time=305.4 ms
> 64 bytes from 195.113.31.123: icmp_seq=73 ttl=56 time=9.8 ms
> 64 bytes from 195.113.31.123: icmp_seq=74 ttl=56 time=3.7 ms
>
> ...and they are still there in 2.6.25-git0. I had ethernet EEPROM
> checksum problems, which I fixed by the update, but problems are not
> gone.

pavel, start using "e1000e" instead - this driver replaces e1000 for all the
pci-express devices and has the infamous L1 ASPM disable patch to fix this issue.

make sure you have CONFIG_E1000E=m/y in your .config, otherwise the old e1000 code
will drive your card, and that driver does not have the fix.

BAH, this is a good example how Linus' patch can wreak havoc - a lot of people
will now not see fixes since they only go into e1000e, but people can unnoticed
now go and use e1000 for too long...

Auke
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