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From: David Miller <davem@davemloft.net>
Subject: Re: Socket buffer sizes with autotuning
Date: Fri, 25 Apr 2008 00:28:04 -0700 (PDT)
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From: Andi Kleen <andi@firstfloor.org>
Date: Fri, 25 Apr 2008 09:06:48 +0200

> The only big problem then would be if there are more submitting threads
> than packets in the TX queue, but I would consider that unlikely for
> GB+ NICs at least (might be an issue for older designs with smaller queues)

It's probably exactly what happens in those chat server benchmarks.