PLOCKSTAT(1) PLOCKSTAT(1)
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:
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)
