90 lines
5.6 KiB
HTML
90 lines
5.6 KiB
HTML
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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE html
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PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html lang="en-us" xml:lang="en-us">
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<meta name="DC.Type" content="reference" />
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<meta name="DC.Title" content="Options to view thread information" />
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<meta name="abstract" content="The Display Job (DSPJOB), Work with Job (WRKJOB), and Work with Active Jobs (WRKACTJOB) commands allow you to display and work with threads associated with an i5/OS job." />
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<meta name="description" content="The Display Job (DSPJOB), Work with Job (WRKJOB), and Work with Active Jobs (WRKACTJOB) commands allow you to display and work with threads associated with an i5/OS job." />
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<meta name="DC.Relation" scheme="URI" content="rzahwbugco.htm" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 1998, 2006" />
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<meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 1998, 2006" />
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<link rel="stylesheet" type="text/css" href="./ibmdita.css" />
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<link rel="stylesheet" type="text/css" href="./ic.css" />
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<title>Options to view thread information</title>
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</head>
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<body id="rzahwork-orkco"><a name="rzahwork-orkco"><!-- --></a>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">Options to view thread information</h1>
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<div><p>The <span class="cmdname">Display Job (DSPJOB)</span>, <span class="cmdname">Work with
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Job (WRKJOB)</span>, and <span class="cmdname">Work with Active Jobs (WRKACTJOB)</span> commands
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allow you to display and work with threads associated with an <span class="keyword">i5/OS™</span> job.</p>
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<div class="section"><div class="p">Through each of these commands, you can select an option that
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allows you to display or work with the threads in the job. You can use the
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Work with Threads display to view the following information for the job:<ul><li>List of threads:<p>This display shows all of the threads that are currently
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associated with the job. The first thread in the list is the initial thread
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in the process. An eight-digit number (Thread) identifies threads by their
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identifier. This list changes depending on the thread activity in the job.
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Other information about this display includes the thread's status
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of active or waiting, total CPU usage, total auxiliary storage I/O counts,
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and thread run priority.</p>
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</li>
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<li>Thread call stack option:<p>This option displays the call stack of any
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thread. In some conditions, typically when the thread is running an instruction
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that cannot be interrupted, the call stack cannot be displayed. In these cases,
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a message indicates that no stack information is available is displayed.</p>
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</li>
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<li>Thread mutual exclusions (mutexes) option:<p>This option allows you to
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see all mutexes associated with a specific thread. This includes mutexes that
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are held and the mutex for which the thread might be waiting. If the specified
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thread has no mutexes that are associated with it, the Job or thread has no
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mutexes message is displayed. </p>
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</li>
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<li>Thread locks option:<p>This option allows you see all the thread-scoped
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object locks held by the thread. It also allows you to see all pending process-scoped
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locks and thread-scoped locks on which the the thread is waiting. If the specified
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thread has no object locks associated with it, the Thread has no locks message
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is displayed. </p>
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</li>
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<li>Hold thread option:<p>This option allows you to temporarily suspend the
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running of a specific thread. This option is useful if you suspect that a
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thread might be looping or causing some other system problem. You must use
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the Hold thread option in conjunction with the Release thread option. Unlike <span class="cmdname">Hold
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Job (HLDJOB)</span>, repeated Hold thread requests are cumulative. To resume
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the running of a held thread, you must issue the equivalent number of Release
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thread requests. </p>
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</li>
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<li>Release thread option:<p>This option is used to resume the running of
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a thread that has been suspended.</p>
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</li>
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<li>End thread option:<p>This option allows you to end a specific thread.
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In general, you should not use of this option because it can cause unpredictable
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results. This option requires *SERVICE special authority. </p>
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</li>
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</ul>
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</div>
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<p>The <span class="cmdname">Release Job (RLSJOB)</span>, <span class="cmdname">Hold Job
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(HLDJOB)</span>, <span class="cmdname">End Job (ENDJOB)</span>, and <span class="cmdname">End
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Job Abnormal (ENDJOBABN)</span> commands affect all threads within a multithreaded
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job. No commands are planned to provide the equivalent thread-level support.</p>
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</div>
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</div>
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<div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rzahwbugco.htm" title="Use the concepts and techniques that are described here to learn about debugging and servicing multithreaded jobs:">Debugging and servicing of multithreaded jobs</a></div>
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</div>
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</div>
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</body>
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</html>
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