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This buffersizing binary search test requires an iperf that has been modified in two ways: * Larger SYN backlog (1024, instead of 2, to avoid dropped connections) * Wait a while before transmitting packets Without this change, iperf quickly connects to the server and fills the bottleneck queue, which causes subsequent SYNs to take longer to complete. This can be a pain when running the experiment. This patch is no perfect cure, but speeds things up a bit, by forcing iperf to sleep for 5 seconds (arbitrary) before sending data. To apply the changes, download iperf-2.0.5.tar.gz from: http://sourceforge.net/projects/iperf/ To apply the patch: $ tar xzvf iperf-2.0.5.tar.gz $ cd iperf-2.0.5/src $ patch -p1 < iperf-2.0.5-wait-syn.patch $ cd .. $ (build the package) Alternatively, excecute build-patched-iperf.sh