Re: how to get the latency down on maxed out classes?

Linux Advanced Routing and Traffic Control

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Hi Don!

>  > I then tried fifos. With small packet fifos the packet loss is just
>  > to great to be of any use and even then the latency is quite high (~200ms).
> You consider 200ms high?  One max size packet = 1500 bytes = 12Kbit
> which is about 200ms on a 64Kbit link.  You can't expect to do better.

The problem is that with 200ms the packet loss is so much that the link is
effectively useless (90% packet loss). As soon as I make the queue big
enough to not drop significant amounts of packets, the latency goes way up
(>3 secs).

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