rb_syscalls.d - count Ruby calls and syscalls using DTrace. rb_syscalls.d { -p PID | -c cmd } Filename and method names are printed if available. The filename for syscalls may be printed as "ruby", if the program was invoked using the form "ruby filename" rather than running the program with an interpreter line. Any Evolving - uses the DTrace Ruby provider, which may change as additional features are introduced. Check Ruby/Readme to see what version these scripts are based on.

Default output, # rb_syscalls.d

FILE Filename of the Ruby program

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