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59 lines
4.0 KiB
HTML
Executable File
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<html><head><meta http-equiv="Content-Type" content="text/html;charset=UTF-8">
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<title>MPI On Cell (Documentation): Startup & Shutdown</title>
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<link href="../../doxygen.css" rel="stylesheet" type="text/css">
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<link href="../../tabs.css" rel="stylesheet" type="text/css">
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</head><body>
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<!-- Generated by Doxygen 1.5.6 -->
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<div class="navigation" id="top">
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<div class="tabs">
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<ul>
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<li><a href="../../main.html"><span>Main Page</span></a></li>
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<li><a href="../../modules.html"><span>Modules</span></a></li>
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<li><a href="../../annotated.html"><span>Data Structures</span></a></li>
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<li><a href="../../files.html"><span>Files</span></a></li>
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</div>
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</div>
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<div class="contents">
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<h1>Startup & Shutdown<br>
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<small>
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[<a class="el" href="../../d2/d16/group__internal__env.html">Environmental Management</a>]</small>
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</h1>
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<p>
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<div class="dynheader">
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Collaboration diagram for Startup & Shutdown:</div>
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<div class="dynsection">
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<center><table><tr><td><img src="../../d6/de0/group__internal__init.png" border="0" alt="" usemap="#de/dcf/d6_2de0_2group____internal____init_map">
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<map name="de/dcf/d6_2de0_2group____internal____init_map">
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<area shape="rect" href="../../d2/d16/group__internal__env.html" title="Internals about Startup & Shutdown and Error-Handling." alt="" coords="5,5,187,32"><area shape="rect" href="../../dc/df1/group__internal__spu__thread.html" title="This section deals about the creation and management of SPU-threads." alt="" coords="421,5,592,32"></map></td></tr></table></center>
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</div>
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<hr><a name="_details"></a><h2>Detailed Description</h2>
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Internals about the startup of the execution-environment and SPU-Thread-Management.
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<p>
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<h2><a class="anchor" name="iinit_start">
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Startup</a></h2>
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The PPU-Process creates for every SPU-thread an own thread using the pthread-library (see <a class="el" href="../../dc/df1/group__internal__spu__thread.html">SPU-Thread Management</a>). The rank of each prozess, the overall process count, the sizes of message-queue and buffer-space and the effective base address of the buffer is send to each SPU-thread via mailbox-messages. The SPU-threads then send the memory-addresses of their message-queues and status-arrays back to the PPU-process which writes this data into the prozess-list. After all SPU-Threads have reported back to the PPU-process the effective address of the PPU's process-list ist distributed among the SPU-processes which then copy the process-list via DMA in their local storages.<h2><a class="anchor" name="iinit_shut">
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Shutdown</a></h2>
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<h3><a class="anchor" name="iinit_shut_ppu">
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PPU</a></h3>
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The PPU-process waits till all SPU-threads have signalled that they are also executing the finalize-function. After that a signal is send back to each SPU-Thread that they can now stop execution. Then local ressources are freed and the finalize-function returns.<h3><a class="anchor" name="iinit_shut_spu">
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SPU</a></h3>
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A mailbox-message is send to the PPU to signal that the SPU-process is now executing the finalize-function. After that the SPU-process is waiting till a mailbox-message from the PPU-process is received. Then local ressources are freed and the finalize-function returns.
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<p>
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<table border="0" cellpadding="0" cellspacing="0">
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<tr><td></td></tr>
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<tr><td colspan="2"><br><h2>Modules</h2></td></tr>
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<tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="../../dc/df1/group__internal__spu__thread.html">SPU-Thread Management</a></td></tr>
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<tr><td class="mdescLeft"> </td><td class="mdescRight">This section deals about the creation and management of SPU-threads. <br></td></tr>
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<p>
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</table>
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</div>
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<hr size="1"><address style="text-align: right;"><small>Generated on Thu Feb 12 13:51:05 2009 for MPI On Cell (Documentation) by
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<a href="http://www.doxygen.org/index.html">
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<img src="../../doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.5.6 </small></address>
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