NAME¶

pcp-pidstat - Report statistics for Linux tasks.

SYNOPSIS¶

pcp [pcp options] pidstat [-I] [-l] [-R] [-r] [-k] [-U [username]] [-V] [-G processname] [-p pid1,pid2..] [-t interval] [-s count] [-a archive] [-B state] [-f format] [-Z timezone] [-z] [-?]

DESCRIPTION¶

The pcp-pidstat command is used for monitoring individual tasks running on the system. Using various options it helps a user to see useful information related to the processes. This information includes CPU percentage, memory and stack usage, scheduling and priority. By default pcp-pidstat reports live data for the local host.

OPTIONS¶

When invoked via the pcp(1) command, the -h/--host, -a/--archive, -O/--origin, -s/--samples, -t/--interval, -Z/--timezone and several other pcp options become indirectly available; refer to PCPIntro(1) for a complete description of these options.

The additional command line options available for pcp-pidstat are:

-I

In an SMP environment, indicates that tasks CPU usage should be divided by the total number of processors.

-l

Display the process command name and all its arguments.

-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. 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 currently used share of available physical memory.

Command
The command name of the task.

-k

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.

-U [username], --user-name[=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.

-V, --version

Print version number then exit.

-G processname, --process-name=processname

Display only processes whose command name includes the string processname. This string can be a regular expression.

-p pid1,pid2.., --pid-list=pid1,pid2..

Display only processes with the listed PIDs.

-t interval, --interval=interval

Set the interval between two samples. The default is one second.

-s count, --samples=count

Set the number of samples to be displayed. Since the first sample is used for the rate conversion of some of the metrics, the total number of samples reported are one less than count. The default is continous.

-a archive, --archive=archive

Causes pcp-pidstat to use the specified archive than connecting to PMCD. The argument to -a is a comma-separated list of names, each of which may be the base name of an archive or the name of a directory containing one or more archives.

-B

Report process states. The argument to -B is one of the following:

detail
Show total time processes have spent in each of the 5 different states

all
Show total time processes spent in their current state

[R,S,T,D,Z]
A comma separated list of process states. For example, -B R,S will report processes currently in either R or S states and not report processes currently in any other states.

-f

Use the format string for formatting the timestamp. The format will be used with the python(1) datetime.strftime method which is similar to that described in strftime(3). An empty format string (i.e, "") will remove the timestamps from the output. The default with stdout is %H:%M:%S.

-Z timezone, --timezone=timezone

By default, pcp-pidstat reports the time of day according to the local timezone on the system where pcp-pidstat is run. The -Z option changes the timezone to timezone in the format of the environment variable TZ as described in environ(7).

-z , --hostzone

Change the reporting timezone to the local timezone at the host that is the source of the performance metrics. When replaying a PCP archive that was captured in a foreign timezone, the -z option would almost always be used (the default reporting timezone is the local timezone, which may not be the same as the timezone of the PCP archive).

-? , --help

Display usage message and exit.

NOTES¶

pcp-pidstat is inspired by the pidstat(1) command and aims to be command line and output compatible with it.

PCP ENVIRONMENT¶

Environment variables with the prefix PCP_ are used to parameterize the file and directory names used by PCP. On each installation, the file /etc/pcp.conf contains the local values for these variables. The $PCP_CONF variable may be used to specify an alternative configuration file, as described in pcp.conf(5).

For environment variables affecting PCP tools, see pmGetOptions(3).

SEE ALSO¶

PCPIntro(1), pcp(1), pidstat(1), python(1), pmParseInterval(3), strftime(3) and environ(7).