%-> Using a windows client to a jetstream server I get 210Kbytes/s.
%-> Using a linux server I get 410Kb/s.
%->
%-> Performance of the ADSL comes second to the performance of the
%-> TCP/IP stack.

Perhaps it would be more correct to say that Linux has a better-tuned TCP/IP stack ... with a bit of tweaking (upping TCP receive buffers, enabling RFC 1323 extensions) Windows 98 and Windows 2000 give the same download performance as Linux kernel 2.2 and 2.4-pre.

A rough formula for working out the buffer size is:

        Buffer (bytes) = bandwidth (KBps) * roundtrip (ms)

E.g. if you have 250ms RTTs, and a network that sustains 420KBps, use a buffer of 105KB. Works here...

-- Juha

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Received on Thu Nov 9 17:19:23 2000