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SubjectRe: Weird tcp performance differences with 2.0 and 2.2 kernels
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In article <m2679aio4w.fsf@blinky.bfr.co.il>,
hjstein@bfr.co.il (Harvey J. Stein) writes:
> "Mark R. Boyns" <boyns@contigo.com> writes:
>> We're trying to figure out some weird performance differences between
>> 2.0.x / 2.2.x kernels and the interface being used.

> I noticed some weird behavior last night. I was dialed into the
> office from home. I was uploading some files via ftp. The modem send
> light started off blinking rapidly (basically flickering) indicating
> high traffic. Then it suddenly backed off, maybe sending about 1
> packet/second. It stayed like this for maybe 30-60 seconds & then
> sped up again, but not to as fast as it was initially. Final
> throughput was a little on the low side.

Congratulations. You just discovered the slow start TCP algorithm. Please
read RFC2001 for more information.


-Andi

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