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Re: [PATCH] abysmal e1000 performance (DITR)

To: tharbaugh@xxxxxxxx
Subject: Re: [PATCH] abysmal e1000 performance (DITR)
From: Jeff Garzik <jgarzik@xxxxxxxxx>
Date: Thu, 26 Aug 2004 16:26:50 -0400
Cc: hadi@xxxxxxxxxx, "Venkatesan, Ganesh" <ganesh.venkatesan@xxxxxxxxx>, netdev@xxxxxxxxxxx, "Feldman, Scott" <scott.feldman@xxxxxxxxx>, "Brandeburg, Jesse" <jesse.brandeburg@xxxxxxxxx>
In-reply-to: <1093550644.20769.130.camel@tubarao>
References: <468F3FDA28AA87429AD807992E22D07E014CEF36@orsmsx408> <1093542930.1027.124.camel@xxxxxxxxxxxxxxxx> <1093550644.20769.130.camel@tubarao>
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Thayne Harbaugh wrote:
On Thu, 2004-08-26 at 13:55 -0400, jamal wrote:


Can you please make this feature off by default and perhaps
accesible via ethtool for peopel who want to turn it on.
I just wasted a few hours and was bitten by this performance-wise.
Please consider disabling it.

This is a *horrible* problem.  Even though it's fixable by passing a
module parameter, the default bites those that *know* about it.  We have
had customers bitten by this and customers that have insisted in
swapping all the NICs in a cluster to Broadcom TG3 NICs.

It's a black eye for Intel and a loss of business - that's the opinion
of our customers.

If it's so bad we should disable it by default, either via the module parameter or via a kernel CONFIG_xxx option.


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