Package org.bootchart.parser.linux

Class PacctParser

java.lang.Object

org.bootchart.parser.linux.PacctParser

public class PacctParser
extends Object

PacctParser parses the BSD process accounting v3 files. The accounting file contains information about process creation times, PIDs, PPIDs etc. It is used to get detailed information about process forks, filling in any dependency blanks caused by the polling nature of /proc/[PID]/top logging.

Constructor Summary

Constructors

Constructor	Description
PacctParser()

Method Summary

Modifier and Type	Method	Description
static List	getPPIDs(int pid, Map forkMap)	Returns a list of all parent PIDs (parent, grandparent, etc.) for the specified PID.
static Map	parseLog(InputStream is)	Parses the pacct accounting file.

Methods inherited from class java.lang.Object

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

Constructor Details

PacctParser

public PacctParser()

Method Details

parseLog

public static Map parseLog(InputStream is)
                    throws IOException

Parses the pacct accounting file. See include/linux/acct.h for format.

Parameters:

is - the input stream to parse

Returns:

a map of Integer to Integer forks

Throws:

IOException - if an I/O error occurs

getPPIDs

public static List getPPIDs(int pid,
 Map forkMap)

Returns a list of all parent PIDs (parent, grandparent, etc.) for the specified PID.

Parameters:

pid - the PID to get the PPIDs for

forkMap - fork map

Returns:

a list of parent PIDs