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

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Message-ID: <47AB4B2E.1030801@intel.com>
Date:	Thu, 07 Feb 2008 10:17:18 -0800
From:	"Kok, Auke" <auke-jan.h.kok@...el.com>
To:	Pavel Machek <pavel@....cz>
CC:	kernel list <linux-kernel@...r.kernel.org>,
	e1000-devel@...ts.sourceforge.net, john.ronciak@...el.com,
	jeffrey.t.kirsher@...el.com, jesse.brandeburg@...el.com,
	Jeff Garzik <jgarzik@...ox.com>
Subject: Re: [E1000-devel] e1000 1sec latency problem

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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