| author | timkelly |
| Thu, 10 Dec 2009 13:45:47 -0600 | |
| branch | RCL_2_4 |
| changeset 671 | 80524b72f957 |
| parent 0 | fb279309251b |
| child 990 | 5d016a880824 |
| child 1024 | 48b401835d0a |
| permissions | -rw-r--r-- |
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" |
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"http://www.w3.org/TR/html4/loose.dtd"> |
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<html><head> |
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<title>Scheduler State</title> |
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<link href="sysdoc-eclipse.css" type="text/css" rel="stylesheet" media="screen"> |
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<link href="sysdoc-eclipse.css" type="text/css" rel="stylesheet" media="print"> |
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<link href="../../book.css" type="text/css" rel="stylesheet" > |
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<div class="Head1"> |
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<h2>Scheduler State</h2> |
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</div> |
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<div> |
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<p>The first three lines and the fifth line of the output show the |
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state of the kernel scheduler. This information is mainly of interest to kernel |
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engineers, although the state of the kernel and the system locks can be useful |
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when debugging device driver crashes.</p> |
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<p class="listing">SCHEDULER @64000348: CurrentThread 640396b0<br> |
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RescheduleNeeded=00 DfcPending=00 KernCSLocked=00000001<br>DFCS: next 64000458 prev 64000458<br>...<br>SYSLOCK: HoldingThread 00000000 iWaiting 00000000</p> |
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<p>The values are interpreted as follows:</p><table cellpadding="1" border="0" cellspacing="0"><tr><td |
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class="TableWrap"><table cellpadding="5" cellspacing="1" |
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border="0"><tr valign="top"><td class="Cell"> |
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<p>SCHEDULER @</p></td><td class="Cell"> |
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<p>This is the address of the kernel’s scheduler instance; this |
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is not very useful.</p></td></tr> |
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<tr valign="top"><td class="Cell"> |
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<p>CurrentThread</p></td><td class="Cell"> |
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<p>The address of the kernel object for the current kernel |
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thread.</p></td></tr> |
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<tr valign="top"><td class="Cell"> |
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<p>RescheduleNeeded</p></td><td class="Cell"> |
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<p>This is set to non-zero by the kernel to force a reschedule, |
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for example if a thread has been signalled</p></td></tr> |
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<tr valign="top"><td class="Cell"> |
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<p>DfcPending</p></td><td class="Cell"> |
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<p>This is non-zero when there are DFCs queued.</p></td></tr> |
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<tr valign="top"><td class="Cell"> |
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<p>KernCSLocked</p></td><td class="Cell"> |
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<p>This is incremented each time the kernel is locked by a call |
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to NKern::Lock(), and decremented by calls to NKern::Unlock(). A value of zero means that the kernel is |
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not locked.</p></td></tr> |
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<tr valign="top"><td class="Cell"> |
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<p>DFCS:</p></td><td class="Cell"> |
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<p>The addresses of the next and the previous items on the DFC |
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queue</p></td></tr> |
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<tr valign="top"><td class="Cell"> |
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<p>HoldingThread</p></td><td class="Cell"> |
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<p>The address of the thread holding the system lock mutex. The |
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system lock is set by call to NKern::LockSystem() and |
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unset by call to NKern::UnlockSystem()</p></td></tr> |
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<tr valign="top"><td class="Cell"> |
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<p>iWaiting</p></td><td class="Cell"> |
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<p>Non-zero, if any thread is waiting for the system lock |
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mutex.</p></td></tr> |
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</table></td></tr></table> |
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<p> </p> |
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</div> |
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<h5>Related tasks</h5> |
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<ul> |
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<li><a href="CrashDebuggerInfoAboutKernel.guide.html">Extracting Kernel Information</a> </li> |
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<li><a href="CrashDebuggerInfoAboutKernel.guide03.html">Current Thread State</a></li> |
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<li><a href="CrashDebuggerInfoAboutKernel.guide04.html">Current Process State</a></li> |
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<li><a href="CrashDebuggerInfoAboutKernel.guide05.html">Current Data Section Process</a></li> |
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</ul> |
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<div id="footer">Copyright © 2009 Nokia Corporation and/or its subsidiary(-ies). All rights reserved. <br>License: <a href="http://www.eclipse.org/legal/epl-v10.html">http://www.eclipse.org/legal/epl-v10.html</a></div> |
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</body> |
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</html> |
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