From: John Gibson (johngibson1541@yahoo.com)
Date: Wed May 09 2007 - 17:54:13 ART
I heard someone said WRED prevents packets' bytes and
bits from being cut in the middle whiling queuing
to the output (software) queue, which wastes
processing
power, by setting the threshold of "stop queuing".
That couldn't be right I believe.
The software queues store pointers to the header
of a packet's bytes and bits. There shouldn't be such
a concern of bytes and bits of a packet being cut in
the middle while queuing to the software queue.
I believe:
WRED is the result of work of engineering probability
calculation which discovered some gain in throughput
that by avoiding the peaks and valleys of sending
packet rates. They have mathematical proof but the
intuitive view is simply that scrambling TCP's
sending rate retraction (triggered by a packet lost)
among different flows makes everyone more productive.
Imagine in a 1 bathroom apartment, 2 people with
different work shifts makes it more comfortable
to live together.
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