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Test setup:

• The test consisted in running the netperf tcp stream test through the wrap board, to see how much traffic it can sustain/forward/nat with different software setup.
• The network was setup to make all the requests and replies pass through the wrap board, while netserver and netperf where running on the desktop.
• Socket sizes: -s = -S = 57344.
• Desktop: PentiumD 920 (2×2.8Ghz), 2Gb RAM - FreeBSD-HEAD/amd64.
• Wrap: AMD Geode (486 clone 233Mhz), 128MB RAM [http://www.pcengines.ch/wrap.htm details here]
• World and kernel for the wrap board were compiled with -O1 (except in the gcc optimization tests).
• A tarball containing test results, gnuplot files and plots is available [http://people.freebsd.org/~piso/wrap-exp/wrap-exps.tgz here].

http://people.freebsd.org/~piso/wrap-exp/wrap-exp.png

Legend:

• 4.x: FreeBSD 4.11/i386
• 7.x: FreeBSD HEAD/i386 (30/12/2006)
• fwd: net.inet.ip.forwarding=1
• ffwd: net.inet.ip.fastforwarding=1
• poll-1x: device polling activated for sis0
• poll-2x: device polling activated for sis0 and sis1
• nod: net.isr.direct=0 (7.x default: net.isr.direct=1)
• natd: divert socket + natd
• ipfwnat: in kernel ipfw nat
• O0: -O0 (no optimization)
• O1: -O1
• O2: -O2 -fno-strict-aliasing
• Os: -Os (implies -fno-strict-aliasing)

http://people.freebsd.org/~piso/wrap-exp/4vs7.png

http://people.freebsd.org/~piso/wrap-exp/4vs7-forwarding-polling.png

http://people.freebsd.org/~piso/wrap-exp/4vs7-fastforwarding-polling.png

http://people.freebsd.org/~piso/wrap-exp/4vs7-polling-complete.png

http://people.freebsd.org/~piso/wrap-exp/7-directvsnodirect.png

http://people.freebsd.org/~piso/wrap-exp/4vs7-nat.png

http://people.freebsd.org/~piso/wrap-exp/7-opt-complete.png