From mboxrd@z Thu Jan 1 00:00:00 1970 From: Derek Sims Date: Mon, 19 Nov 2007 09:42:11 +0000 Subject: [LARTC] Which CPU for heavy traffic with much filtering/shaping? Message-Id: <47415A73.9020107@interdart.co.uk> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: lartc@vger.kernel.org Hi I have a router with a large number of iptables rules and some extensive traffic shaping (HTB + RED + ... ) + conntrack. The router is running Centos5 on a P4 Celeron 2.4 with 512Mb ram 30% soft interrupt cpu utilisation 7000 packets/second on each of eth1 and eth0 (forwarded packets) 20Mbit/second on both eth1 and eth0 e1000 ethernet on both eth0 and eth1 (eth1 running at 100Mbit) I am trying to optimise the firewall rules and have already managed to reduce cpu si by about 40% however I need to get this router to handle a throughput rate of 100Mbit or more. I have seen hints that using SMP (or multicore) processors will not help for soft interrupt. My question is this: 1. What processors should I be looking for in order to achieve the best routing throughput on a linux router? 2. Is it true that multicore processors will not help much in this situation? Best regards, Derek _______________________________________________ LARTC mailing list LARTC@mailman.ds9a.nl http://mailman.ds9a.nl/cgi-bin/mailman/listinfo/lartc