Package org.bootchart.parser.linux

Class ProcPsParser

java.lang.Object

org.bootchart.parser.linux.ProcPsParser

public class ProcPsParser
extends Object

ProcPsParser parses log files produced by logging the output of /proc/[PID]/stat files. The samples contain status information about processes (PID, command, state, PPID, user and system CPU times, etc.).

Constructor Summary

Constructors

Constructor	Description
ProcPsParser()

Method Summary

Modifier and Type	Method	Description
static int	getState(String state)	Returns the process state.
static PsStats	parseLog(InputStream is, Map pidNameMap, Map forkMap)	Parses the proc_ps.log file.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

ProcPsParser

public ProcPsParser()

Method Details

parseLog

public static PsStats parseLog(InputStream is,
 Map pidNameMap,
 Map forkMap)
                        throws IOException

Parses the proc_ps.log file. The output from /proc/[PID]stat is used to collect process information.

If pidNameMap is set, it is used to map PIDs to command names. This is useful when init scripts are sourced, and thus ps is unable to report the proper process name. A sysinit modification is necessary to generate the mapping log file.

forkMap is an optional map that provides detailed information about process forking.

Parameters:

is - the input stream to read from

pidNameMap - PID to name mapping map (optional)

forkMap - process forking map (optional)

Returns:

process statistics

Throws:

IOException - if an I/O error occurs

getState

public static int getState(String state)

Returns the process state. State can be one of:

• "D": uninterruptible sleep
• "R": running
• "S": sleeping
• "T": traced or stopped
• "Z": zombie

Parameters:

state - process state string

Returns:

process state