Date: Sat, 29 Jan 2005 15:31:04 -0500 From: Chuck Swiger <cswiger@mac.com> To: Lucky Green <shamrock@cypherpunks.to> Cc: freebsd-questions@freebsd.org Subject: Re: Seeking performance tuning pointers/tracking down GIANT Message-ID: <41FBF288.6010000@mac.com> In-Reply-To: <20050129104212.7CAB217030@mail.cypherpunks.to> References: <20050129104212.7CAB217030@mail.cypherpunks.to>
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Lucky Green wrote: > System: > Dual processor Intel PentiumPro motherboard. FreeBSD 5.3 SMP kernel. fxp > 100baseT NIC. > > I am managing a system that is running tor, a fairly network intensive > service. See http://tor.eff.org > The service processes about 7Mbps symmetric traffic sustained. "top" shows > about 33% CPU idle. There is plenty of inactive/free RAM. While server > throughput grew steadily over time, throughput appears to have hit a ceiling > at between 7 and 8 Mbps. You can't do more than around 8-10 megabytes per second of actual data via a 100 Mbs link due to network protocol overhead, packet collisions, and such. If you want this thing to go significantly faster, consider gigabit ethernet. [ If you're only getting 8 megabits per second, then that's another case... ] -- -Chuck
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