Date: Wed, 13 Feb 2002 09:17:25 -0000 From: "Tariq Rashid" <tariq@inty.net> To: <freebsd-net@FreeBSD.ORG> Subject: RE: squeeze more performance out of natd? Message-ID: <MPENKFCCIIDAJKJJOLBHGECICIAA.tariq@inty.net> In-Reply-To: <20020211213015.GO90229@overlord.e-gerbil.net>
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i tried altering the code to do teh following: 1. when select returns saying the file descriptor is readable: 2. process 2 packets at a time (recvfrom woould just fail if there were none left) 3. try this with 3 and 5 packets at a time Surprisingly (for me) I noticed * the natd CPU load still reaches similar levels before the change * using -a alias_ip instead if -interface and using debugging code to ensure that select was NOT used (as mentioned by ari, earlier) also appears not to significantly reduce CPU (eg peak 23% down to peak 21%) Considering the following facts: * cpu load rises roughly linearly with "number of connections to a single dest port" * cpu load rises more than linearly with "number of dest ports" makes me think that the problem is in libalias... investigations are ongoing - any ideas / advice would be great as i'm not an expert. i'll let you know how it goes tariq intY has automatically scanned this email with Sophos Anti-Virus (www.inty.net) To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message
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