Date: Sat, 20 Oct 2001 01:05:56 +0200 From: Marko Zec <zec@tel.fer.hr> To: freebsd-hackers@freebsd.org Cc: freebsd-net@freebsd.org Subject: fxp driver - receive interrupt bundling Message-ID: <3BD0B1D4.CFC32A4D@tel.fer.hr>
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On http://fly.cc.fer.hr/~zec/index.html you can find a 4.4-RELEASE fxp driver source, with patches that incorporate receive interrupt bundling microcode, borrowed from the Intel's Linux e100 driver. Bundling interrupts for a couple of received Ethernet frames can significantly lower interrupt processing overhead, so if you have a really busy server or router or whatever this code can make a noticeable difference. On an 1200 MHz Athlon machine, the microcode saves around 10% of CPU utilization, with incoming traffic of 20k pps on a single interface. The code is tested on 82558 rev B0 hardware, I'd be glad to know how it works on other versions of Intel's fxp cards. Pls. send your comments, suggestions etc. to zec@tel.fer.hr Have fun! To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message
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