K 10
svn:author
V 5
wpaul
K 8
svn:date
V 27
1999-10-20T18:19:26.000000Z
K 7
svn:log
V 677
MFC: merge in performance enhancements from -current for 3c90xB cards.
The transmit strategy for cards with post-"boomerang" ASICs now uses
descriptor polling, which reduces CPU overhead. I can now saturate a
full duplex 100Mbps link in both directions at once with a pair of
3c905B cards, and can achieve slightly better overall TCP speed than
before (11.3MB/sec before compared to 11.57MB/sec now). UDP transmit
performance is up around 11.7MB/sec.

This only affects the 3c905B, 3c900B, 3c905C, 3c980, 3c980B, 3c980C
and 3cSOHO100-TX NICs. The original 3c905 and 3c900 cards still use the old
transmit strategy as they don't support the transmit descriptor polling
feature.

END