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<div>Phoronix results are not quite correct. Seems to me they have some problems with compilation flags. Tried to investigate their results a few years ago and got completely different numbers. <br>
<br>
Best regards,
<div>Alexey Bataev</div>
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<div><br>
23 авг. 2016 г., в 7:54, Hahnfeld, Jonas via Openmp-dev <<a href="mailto:openmp-dev@lists.llvm.org">openmp-dev@lists.llvm.org</a>> написал(а):<br>
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<p class="MsoNormal"><span style="color:#1F497D">There was in article one year ago:
<a href="http://www.phoronix.com/scan.php?page=article&item=clang-svn-openmp&num=2">
http://www.phoronix.com/scan.php?page=article&item=clang-svn-openmp&num=2</a><o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">I never came around to confirm the test results and it may look different for 3.9 now…<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Jonas<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><b><span lang="DE" style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span lang="DE" style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Openmp-dev [<a href="mailto:openmp-dev-bounces@lists.llvm.org">mailto:openmp-dev-bounces@lists.llvm.org</a>]
<b>On Behalf Of </b>Cownie, James H via Openmp-dev<br>
<b>Sent:</b> Tuesday, August 23, 2016 1:48 PM<br>
<b>To:</b> <a href="mailto:openmp-dev@lists.llvm.org">openmp-dev@lists.llvm.org</a><br>
<b>Subject:</b> [Openmp-dev] Public Benchmarks?<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:10.0pt;font-family:"Verdana","sans-serif"">I just noticed that the LLVM page in Wikipedia (<a href="https://en.wikipedia.org/wiki/LLVM">https://en.wikipedia.org/wiki/LLVM</a> ) contains the statement
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:10.0pt;font-family:"Verdana","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-GB" style="font-size:12.0pt;font-family:"Arial","sans-serif";color:#252525;background:white">For run-time performance of the compiled programs, GCC formerly outperformed LLVM by 10% on average.</span><sup id="cite_ref-18"><span lang="EN-GB" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#252525;background:white"><a href="https://en.wikipedia.org/wiki/LLVM#cite_note-18"><span style="color:#0B0080;text-decoration:none">[18]</span></a><a href="https://en.wikipedia.org/wiki/LLVM#cite_note-19"><span style="color:#0B0080;text-decoration:none">[19]</span></a></span></sup><span class="apple-converted-space"><span lang="EN-GB" style="font-size:12.0pt;font-family:"Arial","sans-serif";color:#252525;background:white"> </span></span><span lang="EN-GB" style="font-size:12.0pt;font-family:"Arial","sans-serif";color:#252525;background:white">Newer
results indicate that LLVM has now caught up with GCC in this area, and is now compiling binaries of approximately equal performance,
<span style="background:yellow;mso-highlight:yellow">except for programs using<span class="apple-converted-space"> </span></span></span><span lang="EN-GB" style="font-size:14.0pt;background:yellow;mso-highlight:yellow"><a href="https://en.wikipedia.org/wiki/OpenMP" title="OpenMP"><span style="font-size:12.0pt;font-family:"Arial","sans-serif";color:#0B0080;text-decoration:none">OpenMP</span></a></span><span lang="EN-GB" style="font-size:12.0pt;font-family:"Arial","sans-serif";color:#252525;background:yellow;mso-highlight:yellow">.</span><sup id="cite_ref-20"><span lang="EN-GB" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#252525;background:yellow;mso-highlight:yellow"><a href="https://en.wikipedia.org/wiki/LLVM#cite_note-20"><span style="color:#0B0080;text-decoration:none">[20]</span></a></span></sup><span lang="EN-GB" style="font-size:10.0pt;font-family:"Verdana","sans-serif""><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:10.0pt;font-family:"Verdana","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:10.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:EN-GB">I believe that is wrong (their evidential link is from 2012!), and our OpenMP performance is now at least comparable with, if not
better than, that of GCC, but I don’t have any public benchmarks to prove it. <o:p>
</o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:10.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:10.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:EN-GB">So, does anyone have any pointers to public articles that show that, so that we can go in and fix the Wikipedia article?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:10.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:EN-GB">(Phoronix’ latest at
<a href="http://www.phoronix.com/scan.php?page=article&item=gcc-61-clang39&num=1">
http://www.phoronix.com/scan.php?page=article&item=gcc-61-clang39&num=1</a> doesn’t seem to have any OpenMP codes in it, so that’s no use).<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:10.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:10.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:EN-GB">Thanks<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:10.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:10.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:EN-GB">-- Jim<br>
<br>
James Cownie <<a href="mailto:james.h.cownie@intel.com">james.h.cownie@intel.com</a>><br>
SSG/DPD/TCAR (Technical Computing, Analyzers and Runtimes)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:10.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:EN-GB">Tel: +44 117 9071438</span><span lang="EN-GB" style="mso-fareast-language:EN-GB"><o:p></o:p></span></p>
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