linux-kernel - Re: Inter-process send()/recv() using zero-copy ?

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Date:	Wed, 23 Sep 2009 09:04:25 +0200
From:	Xavier Roche <roche+kml2@...lead.com>
To:	Arjan van de Ven <arjan@...radead.org>
CC:	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: Inter-process send()/recv() using zero-copy ?

Arjan van de Ven wrote:
> 1) memory copies are cheap
>    (say, 3000 cycles/page or less)

Yes, but this case would be more than useful for large memory blocks 
(typically memory_size/N, with N typically 2..10) -- something you 
generally have when you deal with mmap'ed blocks.
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