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Reply-To: "Mitchell Erblich" <erblichs@earthlink.net>
From: "Mitchell Erblich" <erblichs@earthlink.net>
To: "Jan-Bernd Themann" <ossthema@de.ibm.com>
Cc: "linux-kernel" <linux-kernel@vger.kernel.org>
Subject: Re: RFC: issues concerning the next NAPI interface
Date: Fri, 24 Aug 2007 19:10:43 -0700
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Jan-Bernd Themann,

                  IMO, a box must be aware of the speed of all its
interfaces, whether the
                  interface impliments tail-drop or RED or XYZ, the latency
to access the
                  packet, etc.

                  Then when a packet arrives, a timer is started for
interrupt colelesing,
                  and to process awaiting packets, if tail-drop is
implemented, it is
                  possible to wait until a the input FIFO fills to a
specific point before
                  starting a timer.

                  This may maximize the number of packets per interupt. And
realize that
                  the worse case of a interrupt per packet is wirespeed
pings (echo
                  request/reply) of 64 bytes per packet.

                   Mitchell Erblich


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