Date: Thu, 18 Feb 1999 22:32:32 -0800 (PST) From: Chris Timmons <skynyrd@opus.cts.cwu.edu> To: Jonathan Lemon <jlemon@americantv.com> Cc: freebsd-hackers@FreeBSD.ORG Subject: Re: Ethernet interrupt overhead Message-ID: <Pine.BSF.3.96.990218222731.17063A-100000@opus.cts.cwu.edu> In-Reply-To: <19990218221154.34584@right.PCS>
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Some time ago when the fxp driver came on the scene we replaced a bunch of de driver cards with fxp ones and the percentage of time spent processing interrupts dropped from about 4% to about .9% on average. The cards are cheap now so you might as well grab one and try it! -c On Thu, 18 Feb 1999, Jonathan Lemon wrote: > I'm seeing (as reported via systat) that the machine is spending > about 30% of it's time handling interrupts. The ethernet card is > generating just under 10,000 interrupts per second. > > This seems to translate into roughly 9,000 cycles/packet, which > seems rather high to me. Is this reasonable, or do I just have > lousy ethernet cards? Would the EtherExpress (fxp0 driver) perform > better under this load? > -- > Jonathan To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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