Date: Fri, 19 Oct 2001 20:49:48 -0400 From: Mike Tancsa <mike@sentex.net> To: zec@tel.fer.hr (Marko Zec) Cc: freebsd-net@freebsd.org Subject: Re: fxp driver - receive interrupt bundling Message-ID: <o1i1ttcg3fbn3n8n4mlv64ta9kldnmskld@4ax.com> In-Reply-To: <SEN.1003532776.274194794@news.sentex.net> References: <SEN.1003532776.274194794@news.sentex.net>
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On Fri, 19 Oct 2001 23:06:16 +0000 (UTC), in sentex.lists.freebsd.hackers you wrote: >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 Hi, What values would you reccomend for a box with 4 fxp NICs in them ? Does it follow the the INT_DELAY should be lowered as you add more NICs ? ---Mike Mike Tancsa (mdtancsa@sentex.net) =09 Sentex Communications Corp, =09 Waterloo, Ontario, Canada "Given enough time, 100 monkeys on 100 routers=20 could setup a national IP network." (KDW2) To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message
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