Date: Mon, 19 Jan 2015 09:11:59 -0600 From: Colton Chojnacki <colton.chojnacki@gmail.com> To: freebsd-net@freebsd.org Subject: netmap example bridge application performance issues Message-ID: <CALDqD=O49rQUkJZK0C28P3wozCEbw7VOR4Kdo7V6hw-0gCCwew@mail.gmail.com>
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I ask this question about a week ago, but I may have asked on the wrong mailing list. I am trying to compare the performance of the bridge application included in netmap with that of linux kernel bridge application. I have noticed that the performance of netmap bridge application is significantly lower than that of the linux kernel bridge. I am not sure that I am using the netmap bridge application correctly. Looking to be pointed in the right direction. I am running the experiment on a single box using two network namespaces. Here is an overview of my setup: -Linux Kernel 3.14.28 with netmap module loaded -two network namespaces: h0, h1 -two veth pairs: veth0, veth1, veth2, veth3 -one bridge implementation: linux kernel bridge or netmap bridge -Each veth pair is terminated on a network namespace and the bridge implementation that I am testing I am running iperf from network namespace h0 to h1. With the linux kernel bridge iperf is reporting a bandwidth of 24.1 Gbps With the netmap bridge application iperf is reporting a bandwidth of 118Mbps The command I am using to setup the netmap bridge application is: ./bridge -i netmap:veth1 -i netmap:veth3 The result of the experiment (24.1Gbps vs 118Mbps) seems off, no? Also which branch/tag of this repository https://code.google.com/p/netmap/ should I be using for the latest linux version of netmap? Thanks, Colton
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