netdev - Re: e1000 performance issue in 4 simultaneous links

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Message-Id: <20080110.172830.16409182.davem@davemloft.net>
Date:	Thu, 10 Jan 2008 17:28:30 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	jesse.brandeburg@...el.com
Cc:	leitao@...ux.vnet.ibm.com, netdev@...r.kernel.org
Subject: Re: e1000 performance issue in 4 simultaneous links

From: "Brandeburg, Jesse" <jesse.brandeburg@...el.com>
Date: Thu, 10 Jan 2008 12:52:15 -0800

> I hope this explanation makes sense, but what it comes down to is that
> combining hardware round robin balancing with NAPI is a BAD IDEA.

Absolutely agreed on all counts.

No IRQ balancing should be done at all for networking device
interrupts, with zero exceptions.  It destroys performance.
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