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4 <title>Scheduler State</title> |
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8 <div class="Head1"> |
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9 |
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10 <h2>Scheduler State</h2> |
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11 </div> |
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12 <div> |
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13 <p>The first three lines and the fifth line of the output show the |
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14 state of the kernel scheduler. This information is mainly of interest to kernel |
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15 engineers, although the state of the kernel and the system locks can be useful |
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16 when debugging device driver crashes.</p> |
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17 <p class="listing">SCHEDULER @64000348: CurrentThread 640396b0<br> |
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18 RescheduleNeeded=00 DfcPending=00 KernCSLocked=00000001<br>DFCS: next 64000458 prev 64000458<br>...<br>SYSLOCK: HoldingThread 00000000 iWaiting 00000000</p> |
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19 <p>The values are interpreted as follows:</p><table cellpadding="1" border="0" cellspacing="0"><tr><td |
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20 class="TableWrap"><table cellpadding="5" cellspacing="1" |
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21 border="0"><tr valign="top"><td class="Cell"> |
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22 <p>SCHEDULER @</p></td><td class="Cell"> |
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23 <p>This is the address of the kernel’s scheduler instance; this |
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24 is not very useful.</p></td></tr> |
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25 <tr valign="top"><td class="Cell"> |
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26 <p>CurrentThread</p></td><td class="Cell"> |
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27 <p>The address of the kernel object for the current kernel |
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28 thread.</p></td></tr> |
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29 <tr valign="top"><td class="Cell"> |
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30 <p>RescheduleNeeded</p></td><td class="Cell"> |
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31 <p>This is set to non-zero by the kernel to force a reschedule, |
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32 for example if a thread has been signalled</p></td></tr> |
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33 <tr valign="top"><td class="Cell"> |
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34 <p>DfcPending</p></td><td class="Cell"> |
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35 <p>This is non-zero when there are DFCs queued.</p></td></tr> |
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36 <tr valign="top"><td class="Cell"> |
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37 <p>KernCSLocked</p></td><td class="Cell"> |
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38 <p>This is incremented each time the kernel is locked by a call |
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39 to NKern::Lock(), and decremented by calls to NKern::Unlock(). A value of zero means that the kernel is |
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40 not locked.</p></td></tr> |
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41 <tr valign="top"><td class="Cell"> |
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42 <p>DFCS:</p></td><td class="Cell"> |
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43 <p>The addresses of the next and the previous items on the DFC |
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44 queue</p></td></tr> |
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45 <tr valign="top"><td class="Cell"> |
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46 <p>HoldingThread</p></td><td class="Cell"> |
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47 <p>The address of the thread holding the system lock mutex. The |
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48 system lock is set by call to NKern::LockSystem() and |
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49 unset by call to NKern::UnlockSystem()</p></td></tr> |
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50 <tr valign="top"><td class="Cell"> |
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51 <p>iWaiting</p></td><td class="Cell"> |
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52 <p>Non-zero, if any thread is waiting for the system lock |
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53 mutex.</p></td></tr> |
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54 </table></td></tr></table> |
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55 <p> </p> |
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56 </div> |
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57 <h5>Related tasks</h5> |
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58 <ul> |
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59 <li><a href="CrashDebuggerInfoAboutKernel.guide.html">Extracting Kernel Information</a> </li> |
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60 <li><a href="CrashDebuggerInfoAboutKernel.guide03.html">Current Thread State</a></li> |
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61 <li><a href="CrashDebuggerInfoAboutKernel.guide04.html">Current Process State</a></li> |
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62 <li><a href="CrashDebuggerInfoAboutKernel.guide05.html">Current Data Section Process</a></li> |
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63 </ul> |
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64 <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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