netdev - Re: limited network bandwidth with 3.2.x kernels

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Message-Id: <20120227.143930.785331756803521221.davem@davemloft.net>
Date:	Mon, 27 Feb 2012 14:39:30 -0500 (EST)
From:	David Miller <davem@...emloft.net>
To:	ncardwell@...gle.com
Cc:	eric.dumazet@...il.com, netdev@...r.kernel.org
Subject: Re: limited network bandwidth with 3.2.x kernels

From: Neal Cardwell <ncardwell@...gle.com>
Date: Thu, 23 Feb 2012 13:39:00 -0500

> If we wanted a larger sample of truesize/len ratios, perhaps we'd want
> some sort of exponentially weighted moving average of skb->truesize
> and skb->len, or the ratio of the two. That could give us a larger
> sample even for well-behaved apps that keep their read queues short.
> But that is starting to seem like it's perhaps overkill.

I don't think it's overkill at all.

And I would do it per-device only on MSS or larger frames using
extremely coarse units to avoid flaps and encorage quick convergance.
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