svcadm(8)을 검색하려면 섹션에서 8 을 선택하고, 맨 페이지 이름에 svcadm을 입력하고 검색을 누른다.
plockstat(8)
plockstat(8) System Administration Commands plockstat(8)
NAME
plockstat - report user-level lock statistics
SYNOPSIS
plockstat [-vACHV] [-n count] [-s depth] [-e secs]
[-x arg [=val]] command [arg]...
plockstat [-vACHV] [-n count] [-s depth] [-e secs]
[-x arg [=val]] -p pid
DESCRIPTION
The plockstat utility gathers and displays user-level locking statis‐
tics. By default, plockstat monitors all lock contention events, gath‐
ers frequency and timing data about those events, and displays the data
in decreasing frequency order, so that the most common events appear
first.
plockstat gathers data until the specified command completes or the
process specified with the -p option completes.
plockstat relies on DTrace to instrument a running process or a command
it invokes to trace events of interest. This imposes a small but mea‐
surable performance overhead on the processes being observed. Users
must have the dtrace_proc privilege and have permission to observe a
particular process with plockstat. Refer to the Oracle Solaris 11.4
DTrace (Dynamic Tracing) Guide for more information about DTrace secu‐
rity features.
OPTIONS
The following options are supported:
-A Watch all lock events. This option is equivalent to
-CH.
-C Watch contention events.
-H Watch hold events.
-e secs Exit after the number of seconds specified have
elapsed.
-n count Display only the specified number of entries for each
output category.
-s depth Record a stack trace rather than just the calling func‐
tion.
-p pid Specify a process ID from which plockstat is to gather
data.
-v Print out a message to indicate that tracing has
started.
-x arg[=val] Enable or modify a DTrace runtime option or D compiler
option. The list of options is found in the Oracle So‐
laris 11.4 DTrace (Dynamic Tracing) Guide. Boolean op‐
tions are enabled by specifying their name. Options
with values are set by separating the option name and
value with an equals sign (=).
-V Print the Dtrace commands used to gather the data. The
output can then be used directly with the dtrace(8)
command.
OPERANDS
The following operands are supported:
arg A string to be passed as an argument to command.
command The name of a utility to be invoked.
count A positive integer value.
pid A process identifier for a process to be monitored.
secs Duration specified as a positive integer number of seconds.
DISPLAY HEADERS
The following headers appear over columns of data in plockstat output.
Count
Number of times an event occurred.
nsec
Average duration of an event, in nanoseconds.
Lock
Address of a lock, displayed symbolically if possible.
Caller
Address of a caller, displayed symbolically if possible.
EXIT STATUS
The following exit values are returned:
0 Successful completion.
>0 An error occurred.
ATTRIBUTES
See attributes(7) for descriptions of the following attributes:
tab() box; cw(2.75i) |cw(2.75i) lw(2.75i) |lw(2.75i) ATTRIBUTE TYPEAT‐
TRIBUTE VALUE _ Availabilitysystem/dtrace _ Interface StabilitySee be‐
low.
The command-line syntax is Committed. The human-readable output is Un‐
committed.
SEE ALSO
mutex_init(3C), pthread_mutex_lock(3C), pthread_rwlock_rdlock(3C),
pthread_rwlock_unlock(3C), pthread_rwlock_wrlock(3C), rwlock(3C), fast‐
trap(4D), attributes(7), dtrace(8), lockstat(8)
Oracle Solaris 11.4 DTrace (Dynamic Tracing) Guide
Oracle Solaris 11.4 16 Aug 2011 plockstat(8)