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Re: network queue lengths

On Thu, Mar 19, 2009 at 03:02:00PM -0400, Michael Richardson wrote:
> >>>>> "Thor" == Thor Lancelot Simon <> writes:
>     >> This is getting a bit long, so I am going to hastily draw some
>     >> conclusions.  Please tell me if I am way off base:
>     Thor> Let me say up front that I don't much care about ALTQ, and I
>     Thor> care more about not harming performance on machines with very
>     Thor> fast networks on both sides (or their only "side") than about
>     Thor> reducing latency on machines with dramatically mismatched
>     Thor> networks.
>   I understand your point of view.
>   I think this is a question about, if there was a tunable, what would
> the default be, and which group of people possess the smarts to tune it
> the "other" way.
>   One important thing might be to treat packets forwarded differently
> from those locally generated.  This inheritely distinguishes machines
> with only one "side"...

I think this is an interesting concept and might dovetail nicely with use
of multiple rings on the card for different purposes.  OTOH, it might still
have a negative effect on routers which straddle two fat / fast networks,
so it would likely still need to be tunable.  It also isn't likely to fix
it for the single-dumb-ring-NIC use case.


  Time is an illusion; lunchtime, doubly so.     |/\/\|           Rafal Boni
                   -- Ford Prefect               |\/\/|

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