sh_wasted.d - measure Bourne shell elapsed times for "wasted" commands. sh_wasted.d { -p PID | -c cmd } This script measures "wasted" commands - those which are called externally but are in fact builtins to the shell. Ever seen a script which calls /usr/bin/echo needlessly? This script measures that cost. Filename and call names are printed if available. Any Evolving - uses the DTrace Shell provider, which may change as additional features are introduced. Check Shell/Readme to see what version these scripts are based on.

Default output, # sh_wasted.d

FILE Filename of the shell or shellscript

NAME Name of call

TIME Total elapsed time for calls (us)

Mike Shapiro

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