DTrace on FreeBSD

FreeBSD includes a substantial port of DTrace: an advanced event-based performance analysis and troubleshooting tool. DTrace can help you identify and quantify the root cause of virtually any performance issue, in both user-level and kernel code. It can be executed using custom and powerful one-liners and scripts.

• Tutorial: Learn DTrace for FreeBSD in 12 easy lessons
• Library of handy DTrace one-liners
• Examples for kernel performance or functional analysis
• Enabling DTrace support in FreeBSD kernel

• How to add SDT probes to DTrace in the kernel

Ideas and new work are kept in the DTraceTODO.

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• The Dynamic Tracing Guide (aka DTrace Guide) is the language and provider reference. Currently focuses on illumos DTrace.
• Oracle's DTrace User Guide and Solaris Dynamic Tracing Guide for Oracle Solaris 11.
• FreeBSD Handbook section on DTrace: http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/dtrace.html
• The website, which includes scripts, for the Prentice Hall 2011 book: DTrace: Dynamic Tracing in Oracle Solaris, Mac OS X, and FreeBSD
• USENIX 2004 paper on DTrace: Dynamic Instrumentation of Production Systems
• ACM Queue 2006 article: Hidden in Plain Sight
• DTrace Review in Google tech talks (2007)
• jb@'s 2008 BSDCan presentation: dtrace_bsdcan2008_jb.pdf