Date: Mon, 4 Sep 2006 10:08:27 -0300 From: Marcelo Gardini do Amaral <marcelo@registro.br> To: Jack Vogel <jfvogel@gmail.com> Cc: Danny Braniss <danny@cs.huji.ac.il>, freebsd-net@freebsd.org, freebsd-stable@freebsd.org Subject: Re: tcp/udp performance Message-ID: <20060904130827.GE12975@registro.br> In-Reply-To: <2a41acea0608301145j7bbed961j33ce903a27d8963d@mail.gmail.com> References: <E1GIMNJ-0000Dd-QH@cs1.cs.huji.ac.il> <2a41acea0608301145j7bbed961j33ce903a27d8963d@mail.gmail.com>
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> > > >Any help? > > > > danny > > Have discussed this some internally, the best idea I've heard is that > UDP is not giving us the interrupt rate that TCP would, so we end up > not cleaning up as often, and thus descriptors might not be as quickly > available.. Its just speculation at this point. > > Try this: the default is only to have 256 descriptors, try going for the MAX > which is 4K. > I've made some udp performance tests with FreeBSD 6-STABLE. The results were poor. I had the best results with 4.11. Does anybody made some test like that? -- Att., Marcelo Gardini NIC .br
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