DTrace, also known as Dynamic Tracing, was developed by Sun™ as a tool for locating performance bottlenecks in production and pre-production systems. It is not, in any way, a debugging tool, but a tool for real time system analysis to locate performance and other issues. (http://www.freebsd.org/doc/en/books/handbook/dtrace.html)
Well, I am trying to install on my old machine, FreeBSD 7.1
Add this following options to your configuration kernel.
options KDTRACE_HOOKS # Kernel DTrace hooks
options DDB_CTF
Compile your kernel with this options WITH_CTF=1
This articel is out of date. Not open my blog for long time, still in draft.
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