Comparison of ns-3 and Linux kernel implemetations of TCP HighSpeed Protocol using Direct Code Execution (DCE)

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• Congestion Window

  

A.plotme - ns-3, 2_format_new.txt - Linux

• Queue Size

  

queue-size.plotme - ns-3, newgraph.plotme - Linux

• Congestion Window

  

A.plotme - ns-3, 2_format_new.txt - Linux

• Queue Size

  

queue-size.plotme - ns-3, newgraph.plotme - Linux

We have identified possible resons for the deviation in the results. This can be found here

Dumbbell Topology - With 2 Routers and 5 nodes on each side of the router

(5 nodes) -- (1 router) -- (1 router) -- (5 nodes)

With each node having a point to point connection to the router

• stack - ("linux"/"ns3")
• transport_prot - TcpHighSpeed
• linux_prot - highspeed
• queue_disc_type - RedQueueDisc

• FACK, SACK, DSACK, ECN have been disabled in both implementations
• PRR is enabled

• dce-gfc-dumbbell-new.cc - Merged code for running tcp high speed implementations of ns-3 and linux kernel
• plot-scripts/plot_cwnd_comparison.sh - Script to plot congestion window data from ns-3 and linux stacks
• plot-scripts/plot_queue_size_comparison.sh - Script to plot queue size data from ns-3 and linux stacks
• plot-scripts/gnuplot_cwnd - gnuplot commands to plot congestion window data
• plot-scripts/gnuplot_queue_size - gnuplot commands to plot queue size data

• TCP HighSpeed RFC
• Linux Implementation
• ns-3 Implementation