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Re: [manet] next version of pause extension

Henning Rogge <hrogge@gmail.com> Thu, 09 November 2017 12:03 UTC

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From: Henning Rogge <hrogge@gmail.com>
Date: Thu, 09 Nov 2017 13:02:55 +0100
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To: Lou Berger <lberger@labn.net>
Cc: Rick Taylor <rick@tropicalstormsoftware.com>, "manet@ietf.org" <manet@ietf.org>
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Subject: Re: [manet] next version of pause extension
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On Wed, Nov 8, 2017 at 3:56 PM, Lou Berger <lberger@labn.net> wrote:
> I really view Pause and Credit as having different use cases.  The first
> is fairly simple to implement but is likely to be inefficient, i.e.,
> result in periods of time when the link is idle.  The second is far more
> powerful and complex to implement, but is likely to be more efficient
> *and* allow a smart router to make more sophisticated decisions based on
> window sizes.

Unfortunately Pause (at least with Linux) is not that great to use...
it works with some cards, it doesn't works with different cards and
sometimes it behaves strange.

We experimented with it but have yet to test it combined with VLAN TOS IDs.

Unfortunately I have yet to find a good way to implement something
like the credit extension without extending the Linux Kernel, so this
is even worse to implement.

(Tips and Hints welcome!)

Henning Rogge

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