pl_flowtime.d - snoop Perl subroutines with flow and delta times. pl_flowtime.d This traces shell activity from Perl programs on the system that are running with Perl provider support. This watches Perl subroutine entries and returns, and indents child subroutine calls. Filename and subroutine names are printed if available. Any Evolving - uses the DTrace Perl provider, which may change as additional features are introduced. Check Perl/Readme to see what version these scripts are based on.

Default output, # pl_flowtime.d

C CPU-id

TIME(us) Time since boot, us

FILE Filename that this subroutine belongs to

DELTA(us) Elapsed time from previous line to this line

SUB Perl subroutine name

-> method entry

<- method return

Watch the first column carefully, it prints the CPU-id. If it changes, then it is very likely that the output has been shuffled.

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