Synopsis
plockstat [-vACHV] [-n count] [-s depth] [-e secs] [-x opt[=val]]
command [arg...]
plockstat [-vACHV] [-n count] [-s depth] [-e secs] [-x opt[=val]]
-p pid
Overview
The plockstat command is a front-end to DTrace that can be used to print statistics about POSIX mutexes and read/write locks.
Since OS X 10.11, in order to use this, your process must be run with DYLD_LIBRARY_PATH set to contain /usr/lib/system/introspection:
DYLD_LIBRARY_PATH=/usr/lib/system/introspection
Which contains the necessary static DTrace probes.
Options
-v: print a message when tracing starts-A: trace contention and hold events (same as -CH)-C: trace contention events for mutexes and rwlocks-H: trace hold events for mutexes and rwlocks-V: print the dtrace script to run
-n count display only 'count' entries for each event type
-s depth show stack trace upto 'depth' entries
-e secs exit after specified seconds
-x arg[=val] enable a DTrace runtime option or a D compiler option
-p pid attach and trace the specified process id
See Also
dtrace(1)
1.0 July 2007 PLOCKSTAT(1)