plockstat1
Trace pthread lock statistics using dtrace
Usage
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 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:
-
-v -
Be verbose.
-
-A -
Print all statistics.
-
-C -
Print commulative statistics (the default).
-
-H -
Print a histogram.
-
-V -
Print the DTrace script about to be used to stderr.
-
-n count -
Set the aggregation count for the data set.
-
-s depth -
Set the ustack (userland stack) caller depth.
-
-e secs -
Does nothing at the moment.
-
-x opt=val -
Specify DTrace options. See the dtrace(1) man page for more details.
Exit status
The plockstat utility exits 0 on success, and >0 if an error occurs.
Releases
25 releases since FreeBSD 11.0-RELEASE; the text changed 12 times.