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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:#1F497D;mso-fareast-language:EN-US">I’m afraid you are not asking in the right place. This list is for discussion of the development of the LLVM OpenMP runtime (which
is effectively part of the compiler).<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:#1F497D;mso-fareast-language:EN-US">It’s not a place for general discussion of OpenMP code itself.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:#1F497D;mso-fareast-language:EN-US">I suggest you take your questions to
<a href="https://stackoverflow.com/">StackOverflow</a> where there are many more people who can answer. (Remember to tag the question with the
</span><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:#1F497D">OpenMP tag…)</span><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:#1F497D">-- Jim<br>
<br>
Jim Cownie <james.h.cownie@intel.com><br>
IAGS/CPDP/TCAR (Technical Computing, Analyzers, and Runtimes)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:#1F497D">Tel: +44 117 9071438</span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><a name="_____replyseparator"></a><b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"> Openmp-dev [mailto:openmp-dev-bounces@lists.llvm.org]
<b>On Behalf Of </b>Himanshu Shukla via Openmp-dev<br>
<b>Sent:</b> Monday, March 4, 2019 7:31 AM<br>
<b>To:</b> openmp-dev@lists.llvm.org<br>
<b>Subject:</b> Re: [Openmp-dev] OpenMP ordered clause for nested loops<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">Apologies for a small mistake above. The second code has 2 as parameter instead of 1.<o:p></o:p></p>
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<p class="MsoNormal"><i>#pragma omp parallel for schedule(static) ordered(2)</i><o:p></o:p></p>
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<p class="MsoNormal"><i> for (int j = 1; j < N; j++)</i><o:p></o:p></p>
</div>
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<p class="MsoNormal"><i> {</i><o:p></o:p></p>
</div>
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<p class="MsoNormal"><i> for (int i = 1; i < N; i++)</i><o:p></o:p></p>
</div>
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<p class="MsoNormal"><i> {</i><o:p></o:p></p>
</div>
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<p class="MsoNormal"><i> printf("Iteration j=%d,i=%d, Thread %d\n", j, i, omp_get_thread_num());</i><o:p></o:p></p>
</div>
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<p class="MsoNormal"><i> }<br>
}</i><o:p></o:p></p>
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<p class="MsoNormal"><i> </i><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">On Mon, Mar 4, 2019 at 12:49 PM Himanshu Shukla <<a href="mailto:cs15btech11042@iith.ac.in">cs15btech11042@iith.ac.in</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">Hi ,<br>
<br>
I am trying to write an OpenMP code. When I execute this code, from the output it is clear that only outer dimension is parallelized. <o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><i>#pragma omp parallel for schedule(static) ordered(1)</i><o:p></o:p></p>
</div>
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<p class="MsoNormal"><i> for (int j = 1; j < N; j++)</i><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><i> {</i><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><i> for (int i = 1; i < N; i++)</i><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><i> {</i><o:p></o:p></p>
</div>
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<p class="MsoNormal"><i> printf("Iteration j=%d,i=%d, Thread %d\n", j, i, omp_get_thread_num());</i><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><i> }</i><o:p></o:p></p>
</div>
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<p class="MsoNormal"><i> }</i><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">But when I execute the following code both the dimensions are parallelized. Why ? As per my understanding , the <b>#pragma omp parallel for </b>directive should only parallelize the outermost dimension and the
inner dimension should run sequentially. Why is ordered clause parameter affecting it ?<o:p></o:p></p>
<div>
<p class="MsoNormal"><i>#pragma omp parallel for schedule(static) ordered(1)</i><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><i> for (int j = 1; j < N; j++)</i><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><i> {</i><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><i> for (int i = 1; i < N; i++)</i><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><i> {</i><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><i> printf("Iteration j=%d,i=%d, Thread %d\n", j, i, omp_get_thread_num());</i><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><i> }</i><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal" style="margin-bottom:12.0pt"><i> }</i><o:p></o:p></p>
</div>
</div>
<div>
<p class="MsoNormal">Please advise .<o:p></o:p></p>
</div>
</div>
</blockquote>
</div>
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