DTrace ToolKit on FreeBSD
DTrace is a pretty cool feature for Solaris 10. Also it is very useful. FreeBSD team want to support this feature too. Dtrace Toolkit is a group of developed scripts.
In this summer, under the instruction of my mentor John Birrell, I learned a lot about kernel hacking. Because many probes supported in Sun OpenSolaris are not supported in FreeBSD, porting DTrace Toolkit is almost similar to writing probes for DTrace Toolkit in FreeBSD kernel. This job requires much more knowledge about kernel of OpenSolaris and of FreeBSD. Actually I find the job is pretty interesting.
Sun Dynamic Tracing Guide http://docs.sun.com/app/docs/doc/817-6223