Re: W/RTT verification, linux tcp buffers behaviour

From: John Heffner
Date: Thu May 18 2006 - 23:43:24 EST


Al Boldi wrote:
Which module would you suggest for a non-congested network?

"It depends." There are quite a few papers out there on this. It's currently an area of active research.


Or is there a module that allows for a=(n+x)*MSS where x is tunable?

You could write one. I don't know that you would want to...


If you are actually CPU limited, on an SMP system you can also get
better performance with multiple connections, since they can be handled
concurrently by multiple CPU's.

It seems that CPU cycles are related to latency, which is related to bandwidth-delay. So a faster CPU should yield higher thruput, which it does, but this would mean, that thruput is dependent on system load as that affects latency.

Is there a module that takes this fluctuation into account, to yield a constant flow?

Sorry, not following. CPU cycles only add to latency if you don't have any. If you don't have spare CPU cycles, you're not going to be sending any faster!

-John

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