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Man Pages
PLOCKSTAT(1) FreeBSD General Commands Manual PLOCKSTAT(1)

plockstat
Trace pthread lock statistics using DTrace

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

The plockstat utility traces pthread locks (mutexes and rwlocks) and prints statistics about them. You can use plockstat to investigate bottlenecks in your software.

The following options are available:

Be verbose.
Print all statistics.
Print commulative statistics (the default).
Print a histogram.
Print the DTrace script about to be used to stderr.
count
Set the aggregation count for the data set.
depth
Set the ustack (userland stack) caller depth.
secs
Does nothing at the moment.
opt=val
Specify DTrace options. See the dtrace(1) man page for more details.

The plockstat utility exits 0 on success, and >0 if an error occurs.

dtrace(1), pthread(3)

The plockstat utility comes from OpenSolaris and was first imported into FreeBSD 9.0.
September 13, 2010 FreeBSD 13.1-RELEASE

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