j_syscalls.d - count Java methods and syscalls using DTrace. j_syscalls.d { -p PID | -c cmd } This traces Java methods if the hotspot provider exists (1.6.0) and the flag "+ExtendedDTraceProbes" is used. 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_syscalls.d

PID Process ID

TYPE Type of call (method/syscall)

NAME Name of call

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_syscalls.d will run until Ctrl-C is hit. Brendan Gregg [CA, USA] dtrace(1M)