Date: Wed, 20 Oct 1999 11:19:27 -0700 (PDT) From: Bill Paul <wpaul@FreeBSD.org> To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/pci if_xl.c if_xlreg.h Message-ID: <199910201819.LAA90515@freefall.freebsd.org>
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wpaul 1999/10/20 11:19:27 PDT
Modified files: (Branch: RELENG_3)
sys/pci if_xl.c if_xlreg.h
Log:
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.
Revision Changes Path
1.22.2.22 +309 -74 src/sys/pci/if_xl.c
1.9.2.9 +19 -2 src/sys/pci/if_xlreg.h
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