Date: Fri, 7 Jan 2000 19:08:03 -0600 (CST) From: Mohit Aron <aron@cs.rice.edu> To: weyrich@goodnet.com (Weyrich Computing Consulting) Cc: freebsd-net@freebsd.org Subject: Re: performance of FreeBSD-current as SMP Message-ID: <200001080108.TAA06197@cs.rice.edu> In-Reply-To: <Pine.GSO.4.05.10001071758540.18649-100000@goodguy.goodnet.com> from "Weyrich Computing Consulting" at Jan 7, 2000 06:04:27 pm
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> > To hazard a guess, there is certain overhead in SMP. If your processing > mix is able to take advantage of concurrent processing, then you will see > a net performance boost, but not the expected doubling (due to the > overhead penalty). > Like I said, I'm just using one processor. So concurrent processing issues don't arise. What's surprising is that just configuring it as an SMP makes the performance go down by 22%. > The question is, does your benchmark allow concurrent > processing? If you have a single Network Interface Card, does it act as a > non-sharable resource that effectively precludes concurrent processing by > two web server processes? Your web server does spawn a new process for > each client session, and you are generating multiple client sessions > concurrently, right? > No, the webserver is event driven - does everything withing a singe process. - Mohit To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message
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