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45 lines
2.8 KiB
HTML
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<title>MPI On Cell (Documentation): Timers and Synchronization</title>
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<h1>Timers and Synchronization<br>
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[<a class="el" href="../../d2/d16/group__internal__env.html">Environmental Management</a>]</small>
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On the PPU "gettimeofday()" from time.h is used, because it is the only function which seems to work ("clock()" from time.h always returns 0).<p>
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On the SPU there are two implementations. One uses also "gettimeofday()" and the other uses the spu-timer-library. The reason for this lies in the fact, that the spu-timer-library was marked as prototype in Cell SDK 3.0 and the future development of this library was uncertain. Cell SDK 3.1 has integrated the spu-timer-library in the main-library and so the gettimeofday-implementation is now obsolete.<p>
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<dl class="note" compact><dt><b>Note:</b></dt><dd>The timebase-constant which is needed to calculate time is hardcoded, because there was no according function for retrieving this value in Cell SDK 3.0 and we had only access to a playstation 3. Now Cell SDK 3.1 provides a function for retrieving the timebase value, but we didn't use it to provide backwards-compatibility. So if you plan to use MOC on another platform than playstation 3 keep in mind to check if the timebase-value is correct. </dd></dl>
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<hr size="1"><address style="text-align: right;"><small>Generated on Thu Feb 12 13:51:06 2009 for MPI On Cell (Documentation) by
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