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Date: Mon, 10 Dec 2001 14:05:31 -0500
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From: "Christopher Friesen" <cfriesen@nortelnetworks.com>
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To: Chris Wright <chris@wirex.com>
Cc: Ben Greear <greearb@candelatech.com>,
        linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: question on select: How big can the empty buffer space be before 
         select returns ready-to-write?
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Chris Wright wrote:
> 
> * Ben Greear (greearb@candelatech.com) wrote:
> > For instance, it appears that select will return that a socket is
> > writable when there is, say 8k of buffer space in it.  However, if
> > I'm sending 32k UDP packets, this still causes me to drop packets
> > due to a lack of resources...
> 
> udp has a fixed 8k max payload. did you try breaking up your packets?

Are you sure about that? UDP has a 16-bit field for the length.  Thus the
standard technically allows for packet sizes (including header) of up to 2^16
(roughly 65K) bytes.

Chris

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