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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"><head>	<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />	<style type="text/css">	body { font-family: Verdana, Arial, Helvetica, sans-serif;}	a.at-term {	font-style: italic; }	</style>	<title>Advantages of OpenMP</title>	<meta name="Generator" content="ATutor">	<meta name="Keywords" content=""></head><body> <p>Some advantages of OpenMP are:</p>

<ul>
   <li>OpenMP is comparatively easy to implement; in particular, it is easy to refit an existing serial code for parallel execution. </li>

  <li>The same source code can be used for both serial and parallel versions.</li>

  <li>More natural for shared-memory architectures.</li>

  <ul><li>In principle, OpenMP should allow better performance than MPI in an SMP system, for certain types of problems.  For example, in a simple loop parallelization, where each OpenMP thread needs only to read from and write to a different part of the shared memory pool, the
parallel efficiency should be very high.  In such a case the main limiting factors will be the overhead of spawning the team of threads and the overall bandwidth of the shared memory bus.</li>
</ul>

<li>Run-time (dynamic) scheduling.</li>

<ul>
<li>Load balancing is often easier to achieve than with MPI.</li>
</ul>

<li>Useful for both fine- and coarse-grained problems.</li>

</ul></body></html>

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