- -C comm
- Display only tasks whose command name includes the string comm.
This string can be a regular expression.
- -d
- Report I/O statistics (kernels 2.6.20 and later only). The following
values may be displayed:
UID
The real user identification number of the task being
monitored.
USER
The name of the real user owning the task being
monitored.
PID
The identification number of the task being
monitored.
kB_rd/s
Number of kilobytes the task has caused to be read from
disk per second.
kB_wr/s
Number of kilobytes the task has caused, or shall cause
to be written to disk per second.
kB_ccwr/s
Number of kilobytes whose writing to disk has been
cancelled by the task. This may occur when the task truncates some dirty
pagecache. In this case, some IO which another task has been accounted for
will not be happening.
iodelay
Block I/O delay of the task being monitored, measured in
clock ticks. This metric includes the delays spent waiting for sync block I/O
completion and for swapin block I/O completion.
Command
The command name of the task.
- --dec={ 0 | 1 | 2 }
- Specify the number of decimal places to use (0 to 2, default value is
2).
- -e program args
- Execute program with given arguments args and monitor it
with pidstat. pidstat stops when program
terminates.
- -G process_name
- Display only processes whose command name includes the string
process_name. This string can be a regular expression. If option -t
is used together with option -G then the threads belonging to that process
are also displayed (even if their command name doesn't include the string
process_name).
- -H
- Display timestamp in seconds since the epoch.
- -h
- Display all activities horizontally on a single line, with no average
statistics at the end of the report. This is intended to make it easier to
be parsed by other programs.
- --human
- Print sizes in human readable format (e.g. 1.0k, 1.2M, etc.) The units
displayed with this option supersede any other default units (e.g.
kilobytes, sectors...) associated with the metrics.
- -I
- In an SMP environment, indicate that tasks CPU usage (as displayed by
option -u ) should be divided by the total number of
processors.
- -l
- Display the process command name and all its arguments.
- -p { pid [,...] | SELF | ALL
}
- Select tasks (processes) for which statistics are to be reported.
pid is the process identification number. The SELF keyword
indicates that statistics are to be reported for the pidstat
process itself, whereas the ALL keyword indicates that statistics
are to be reported for all the tasks managed by the system.
- -R
- Report realtime priority and scheduling policy information. The following
values may be displayed:
UID
The real user identification number of the task being
monitored.
USER
The name of the real user owning the task being
monitored.
PID
The identification number of the task being
monitored.
prio
The realtime priority of the task being monitored.
policy
The scheduling policy of the task being monitored.
Command
The command name of the task.
- -r
- Report page faults and memory utilization.
When reporting statistics for individual tasks, the following
values may be displayed:
UID
The real user identification number of the task being
monitored.
USER
The name of the real user owning the task being
monitored.
PID
The identification number of the task being
monitored.
minflt/s
Total number of minor faults the task has made per
second, those which have not required loading a memory page from disk.
majflt/s
Total number of major faults the task has made per
second, those which have required loading a memory page from disk.
VSZ
Virtual Size: The virtual memory usage of entire task in
kilobytes.
RSS
Resident Set Size: The non-swapped physical memory used
by the task in kilobytes.
%MEM
The tasks's currently used share of available physical
memory.
Command
The command name of the task.
When reporting global statistics for tasks and all their children,
the following values may be displayed:
UID
The real user identification number of the task which is
being monitored together with its children.
USER
The name of the real user owning the task which is being
monitored together with its children.
PID
The identification number of the task which is being
monitored together with its children.
minflt-nr
Total number of minor faults made by the task and all its
children, and collected during the interval of time.
majflt-nr
Total number of major faults made by the task and all its
children, and collected during the interval of time.
Command
The command name of the task which is being monitored
together with its children.
- -s
- Report stack utilization. The following values may be displayed:
UID
The real user identification number of the task being
monitored.
USER
The name of the real user owning the task being
monitored.
PID
The identification number of the task being
monitored.
StkSize
The amount of memory in kilobytes reserved for the task
as stack, but not necessarily used.
StkRef
The amount of memory in kilobytes used as stack,
referenced by the task.
Command
The command name of the task.
- -T { TASK | CHILD | ALL }
- This option specifies what has to be monitored by the pidstat
command. The TASK keyword indicates that statistics are to be
reported for individual tasks (this is the default option) whereas the
CHILD keyword indicates that statistics are to be globally reported
for the selected tasks and all their children. The ALL keyword
indicates that statistics are to be reported for individual tasks and
globally for the selected tasks and their children.
Note: Global statistics for tasks and all their children are
not available for all options of pidstat. Also these statistics
are not necessarily relevant to current time interval: The statistics of
a child process are collected only when it finishes or it is killed.
- -t
- Also display statistics for threads associated with selected tasks.
This option adds the following values to the reports:
TGID
The identification number of the thread group
leader.
TID
The identification number of the thread being
monitored.
- -U [ username ]
- Display the real user name of the tasks being monitored instead of the
UID. If username is specified, then only tasks belonging to the
specified user are displayed.
- -u
- Report CPU utilization.
When reporting statistics for individual tasks, the following
values may be displayed:
UID
The real user identification number of the task being
monitored.
USER
The name of the real user owning the task being
monitored.
PID
The identification number of the task being
monitored.
%usr
Percentage of CPU used by the task while executing at the
user level (application), with or without nice priority. Note that this field
does NOT include time spent running a virtual processor.
%system
Percentage of CPU used by the task while executing at the
system level (kernel).
%guest
Percentage of CPU spent by the task in virtual machine
(running a virtual processor).
%wait
Percentage of CPU spent by the task while waiting to
run.
%CPU
Total percentage of CPU time used by the task. In an SMP
environment, the task's CPU usage will be divided by the total number of CPU's
if option -I has been entered on the command line.
CPU
Processor number to which the task is attached.
Command
The command name of the task.
When reporting global statistics for tasks and all their children,
the following values may be displayed:
UID
The real user identification number of the task which is
being monitored together with its children.
USER
The name of the real user owning the task which is being
monitored together with its children.
PID
The identification number of the task which is being
monitored together with its children.
usr-ms
Total number of milliseconds spent by the task and all
its children while executing at the user level (application), with or without
nice priority, and collected during the interval of time. Note that this field
does NOT include time spent running a virtual processor.
system-ms
Total number of milliseconds spent by the task and all
its children while executing at the system level (kernel), and collected
during the interval of time.
guest-ms
Total number of milliseconds spent by the task and all
its children in virtual machine (running a virtual processor).
Command
The command name of the task which is being monitored
together with its children.
- -V
- Print version number then exit.
- -v
- Report values of some kernel tables. The following values may be
displayed:
UID
The real user identification number of the task being
monitored.
USER
The name of the real user owning the task being
monitored.
PID
The identification number of the task being
monitored.
threads
Number of threads associated with current task.
fd-nr
Number of file descriptors associated with current
task.
Command
The command name of the task.
- -w
- Report task switching activity (kernels 2.6.23 and later only). The
following values may be displayed:
UID
The real user identification number of the task being
monitored.
USER
The name of the real user owning the task being
monitored.
PID
The identification number of the task being
monitored.
cswch/s
Total number of voluntary context switches the task made
per second. A voluntary context switch occurs when a task blocks because it
requires a resource that is unavailable.
nvcswch/s
Total number of non voluntary context switches the task
made per second. A involuntary context switch takes place when a task executes
for the duration of its time slice and then is forced to relinquish the
processor.
Command
The command name of the task.