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SubjectRe: Linux 2.2.2 TCP delays every 41st small packet by 10-20 ms
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>>>>> "Josip" == Josip Loncaric <josip@icase.edu> writes:

Josip> I tested Linux TCP streaming using a modified netpipe-2.3
Josip> code which collected timestamps from the Pentium II tick
Josip> counter. This has the CPU clock frequency resolution (400
Josip> MHz in our case). Our systems use NetGear FA310TX cards
Josip> (some with DEC chips, most with Lite-On chips) and the
Josip> latest testing version 0.90Q of tulip.c driver.

I ran into something suspiciously similar to this today; the tulip.c
driver (version 0.90) in 100BaseT full-duplex mode would often deal
extremely poorly with the collisions that full-duplex mode brings
about. I would get runts, giants, and all sorts of nasty packet errors.

Forcing half-duplex mode solved the problem. I don't know if it's
a driver or hardware problem at this point, but I've never had
luck with any DEC-related ethernet cards. :)

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