j_events.d - count Java events using DTrace. j_events.d This traces activity from all Java processes on the system with hotspot provider support (1.6.0). Some events such as method calls are only visible when using the flag "+ExtendedDTraceProbes". eg, java -XX:+ExtendedDTraceProbes classfile Solaris Evolving - uses the DTrace hotspot provider, which may change as additional features are introduced. Check Java/Readme to see what version these scripts are based on.

Default output, # j_events.d

PID Process ID

EVENT Event name (DTrace probe name)

COUNT Number of calls during sample

See the DTraceToolkit for further documentation under the Examples, Notes and Docs directories. The example files may be especially useful as they aim to demonstrate how to interpret the output. j_events.d will run until Ctrl-C is hit. Brendan Gregg [CA, USA] dtrace(1M)