From owner-freebsd-net@FreeBSD.ORG Tue Apr 19 20:44:25 2005 Return-Path: Delivered-To: freebsd-net@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 262BB16A4CE for ; Tue, 19 Apr 2005 20:44:25 +0000 (GMT) Received: from smtp.openaccess.org (smtp.openaccess.org [216.57.214.76]) by mx1.FreeBSD.org (Postfix) with ESMTP id 82CA743D45 for ; Tue, 19 Apr 2005 20:44:24 +0000 (GMT) (envelope-from michael@staff.openaccess.org) Received: from [216.57.214.90] (unknown [216.57.214.90]) by smtp.openaccess.org (Postfix) with ESMTP id 27AAD4118; Tue, 19 Apr 2005 13:44:15 -0700 (PDT) In-Reply-To: <42656CA0.9040403@stabbursmoen.no> References: <20050419183335.F18008131@joshua.stabbursmoen.no> <5c05f1805041911351d2bd98e@mail.gmail.com> <42656CA0.9040403@stabbursmoen.no> Mime-Version: 1.0 (Apple Message framework v619.2) Content-Type: text/plain; charset=US-ASCII; format=flowed Message-Id: Content-Transfer-Encoding: 7bit From: Michael DeMan Date: Tue, 19 Apr 2005 13:44:23 -0700 To: Eivind Hestnes X-Mailer: Apple Mail (2.619.2) cc: Jerald Von Dipple cc: Eivind Hestnes cc: net@freebsd.org Subject: Re: Performance Intel Pro 1000 MT (PWLA8490MT) X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 19 Apr 2005 20:44:25 -0000 The rule of thumb I have seen on Intel/UNIX based routers is that you want 1GHz of CPU for every gigabit of throughput. Also, on gigabit NICs, make sure you have a 64-bit PCI bus on the motherboard. Michael F. DeMan Director of Technology OpenAccess Network Services Bellingham, WA 98225 michael@staff.openaccess.org 360-647-0785 On Apr 19, 2005, at 1:40 PM, Eivind Hestnes wrote: > Thanks for the advice. Didn't do any difference, though.. Perhaps I > should try to increase the polling frequency.. > > Jerald Von Dipple wrote: > >> Hey man >> >> You need to bump >> >> kern.polling.burst: 150 >> >> Upto at least 150000 >> >> Regards, >> Jerald Von D. >> >> On 4/19/05, Eivind Hestnes wrote: >> >>> Hi, >>> >>> I have an Intel Pro 1000 MT (PWLA8490MT) NIC (em(4) driver 1.7.35) >>> installed >>> in a Pentium III 500 Mhz with 512 MB RAM (100 Mhz) running FreeBSD >>> 5.4-RC3. >>> The machine is routing traffic between multiple VLANs. Recently I >>> did a >>> benchmark with/without device polling enabled. Without device >>> polling I was >>> able to transfer roughly 180 Mbit/s. The router however was >>> suffering when >>> doing this benchmark. Interrupt load was peaking 100% - overall the >>> system >>> itself was quite unusable (_very_ high system load). With device >>> polling >>> enabled the interrupt kept stable around 40-50% and max transfer >>> rate was >>> nearly 70 Mbit/s. Not very scientific tests, but it gave me a pin >>> point. >>> >>> However, a Pentium III in combination with a good NIC should in my >>> opinion >>> be a respectful router.. but I'm not satisfied with the results. The >>> pf >>> ruleset is like nothing, and the kernel is stripped and customized >>> for best >>> performance. >>> >>> Any tweaking tips for making my router perform better? >>> >>> Debug information: >>> eivind@core-gw:~$ sysctl -a | grep kern.polling >>> kern.polling.burst: 150 >>> kern.polling.each_burst: 5 >>> kern.polling.burst_max: 150 >>> kern.polling.idle_poll: 0 >>> kern.polling.poll_in_trap: 0 >>> kern.polling.user_frac: 50 >>> kern.polling.reg_frac: 20 >>> kern.polling.short_ticks: 1411 >>> kern.polling.lost_polls: 720 >>> kern.polling.pending_polls: 0 >>> kern.polling.residual_burst: 0 >>> kern.polling.handlers: 0 >>> kern.polling.enable: 1 >>> kern.polling.phase: 0 >>> kern.polling.suspect: 186 >>> kern.polling.stalled: 0 >>> kern.polling.idlepoll_sleeping: 1 >>> >>> eivind@core-gw:~$ cat /etc/sysctl.conf >>> net.inet.ip.forwarding=1 >>> net.inet.ip.fastforwarding=1 >>> net.inet.carp.preempt=1 >>> kern.polling.enable=1 >>> >>> HZ set to 1000 as recommended in README for the em(4) driver. Driver >>> is of >>> cource compiled into kernel. >>> >>> Regards, >>> Eivind Hestnes >>> >>> _______________________________________________ >>> freebsd-performance@freebsd.org mailing list >>> http://lists.freebsd.org/mailman/listinfo/freebsd-performance >>> To unsubscribe, send any mail to >>> "freebsd-performance-unsubscribe@freebsd.org" >>> >>> > > _______________________________________________ > freebsd-net@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-net > To unsubscribe, send any mail to "freebsd-net-unsubscribe@freebsd.org" >