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Projects & Tools
LKPG & createDist | cpusage(enhanced) Linux Kernel Packet Generator & createDist
Within the scope of my master thesis I enhanced the Linux Kernel Packet Generator (LKPG) to be able to generate packets according to a given packet size distribution. This was necessary because it unenhanced the LKPG can only generate packets of the same size. The mechanism used to set this up is the same as used for the rest of this Linux kernel module: the /proc filesystem.How to use my enhancement: HowTo
The sources for Linux kernel v2.6.8: pktgen-lkpg-dist-0.1.tar.gz. I am working on an recent version as well, but the author of the LKPG Robert Olsson perfomed a major rework of the module, which was published since Linux kernel version 2.6.11.x. These change still have to be adopted for my enhancement.
This example packet size distribution is available: pktgen-lkpg-dist-0.1-example-distribution.sh. This shell script sets the usage of the distribution up. The included packet size distribution was derived from a 24h trace (ca. 3,88 billion packets). This trace was done at the uplink of the MWN to the G-WiN.
and its ReadMe
Monitoring the CPU usage
With this tool for Linux and FreeBSD it is possible to monitor the CPU usage. Twice a second it writes the recent percentages of the different CPU states tics counter to disk.Sources: cpusage-0.31.tar.gz and the man page cpusage(1)
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former versions: