NAME

plockstat - front-end to DTrace to print statistics about POSIX mutexes and read/write locks

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:

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)