Date: Tue, 1 Jul 2008 12:07:40 +0800 From: "Adrian Chadd" <adrian@freebsd.org> To: "Sepherosa Ziehau" <sepherosa@gmail.com> Cc: freebsd-net@freebsd.org, Paul <paul@gtcomm.net> Subject: Re: Freebsd IP Forwarding performance (question, and some info) [7-stable, current, em, smp] Message-ID: <d763ac660806302107y180583efl14aadcde4a244568@mail.gmail.com> In-Reply-To: <ea7b9c170806302005n2a66f592h2127f87a0ba2c6d2@mail.gmail.com> References: <4867420D.7090406@gtcomm.net> <200806301944.m5UJifJD081781@lava.sentex.ca> <20080701004346.GA3898@stlux503.dsto.defence.gov.au> <alpine.LFD.1.10.0807010257570.19444@filebunker.xip.at> <20080701010716.GF3898@stlux503.dsto.defence.gov.au> <alpine.LFD.1.10.0807010308320.19444@filebunker.xip.at> <486986D9.3000607@monkeybrains.net> <48699960.9070100@gtcomm.net> <ea7b9c170806302005n2a66f592h2127f87a0ba2c6d2@mail.gmail.com>
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2008/7/1 Sepherosa Ziehau <sepherosa@gmail.com>: > Properly configured #RX desc and timer intr interval will be required > to make sure that the RX desc collection could keep up with the > hardware speed. I used pure timer intr (8000Hz) on nfe(4) in dfly w/ > good result, i.e. TX/RX @linespeed without livelocking the system. > The drawback of pure timer intr is that you waste extra cpu power, > when there is nothing to process. What packet rate is "linespeed" ? With what size packets? arian
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