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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>So that’s somehow expected: The default value for –fopenmp got flipped to libomp in 3.8, you needed –fopenmp=libomp for 3.7 which isn’t used in this article.<o:p></o:p></span></p><p class=MsoNormal><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:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Cheers,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Jonas<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><div style='border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm 4.0pt'><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><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"'> Andrey Bokhanko [mailto:andreybokhanko@gmail.com] <br><b>Sent:</b> Tuesday, August 23, 2016 2:17 PM<br><b>To:</b> Alexey Bataev<br><b>Cc:</b> Hahnfeld, Jonas; LLVM-OpenMP (openmp-dev@lists.llvm.org)<br><b>Subject:</b> Re: [Openmp-dev] Public Benchmarks?<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>There are a bit fresher results for clang 3.8 (though no comparison with gcc): <a href="http://www.phoronix.com/scan.php?page=article&item=llvm-clang-363738&num=3">http://www.phoronix.com/scan.php?page=article&item=llvm-clang-363738&num=3</a><o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Yours,<o:p></o:p></p></div><div><p class=MsoNormal>Andrey<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div></div><div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>On Tue, Aug 23, 2016 at 3:12 PM, Alexey Bataev via Openmp-dev <<a href="mailto:openmp-dev@lists.llvm.org" target="_blank">openmp-dev@lists.llvm.org</a>> wrote:<o:p></o:p></p><div><div><p class=MsoNormal>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, <o:p></o:p></p><div><p class=MsoNormal>Alexey Bataev<o:p></o:p></p></div></div><div><p class=MsoNormal style='margin-bottom:12.0pt'><br>23 авг. 2016 г., в 7:54, Hahnfeld, Jonas via Openmp-dev <<a href="mailto:openmp-dev@lists.llvm.org" target="_blank">openmp-dev@lists.llvm.org</a>> написал(а):<o:p></o:p></p></div><div><div><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><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" target="_blank">http://www.phoronix.com/scan.php?page=article&item=clang-svn-openmp&num=2</a></span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='color:#1F497D'>I never came around to confirm the test results and it may look different for 3.9 now…</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='color:#1F497D'> </span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='color:#1F497D'>Regards,</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='color:#1F497D'>Jonas</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><div style='border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm 4.0pt'><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><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" target="_blank">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" target="_blank">openmp-dev@lists.llvm.org</a><br><b>Subject:</b> [Openmp-dev] Public Benchmarks?</span><o:p></o:p></p></div></div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><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" target="_blank">https://en.wikipedia.org/wiki/LLVM</a> ) contains the statement </span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-GB style='font-size:10.0pt;font-family:"Verdana","sans-serif"'> </span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:36.0pt'><span lang=EN-GB style='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><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" target="_blank"><span style='color:#0B0080;text-decoration:none'>[18]</span></a><a href="https://en.wikipedia.org/wiki/LLVM#cite_note-19" target="_blank"><span style='color:#0B0080;text-decoration:none'>[19]</span></a></span></sup><span lang=EN-GB style='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><span lang=EN-GB style='font-family:"Arial","sans-serif";color:#252525;background:yellow'>except for programs using </span><span lang=EN-GB style='font-size:14.0pt;background:yellow'><a href="https://en.wikipedia.org/wiki/OpenMP" target="_blank" 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-family:"Arial","sans-serif";color:#252525;background:yellow'>.</span><sup><span lang=EN-GB style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#252525;background:yellow'><a href="https://en.wikipedia.org/wiki/LLVM#cite_note-20" target="_blank"><span style='color:#0B0080;text-decoration:none'>[20]</span></a></span></sup><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-GB style='font-size:10.0pt;font-family:"Verdana","sans-serif"'> </span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-GB style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>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. </span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-GB style='font-size:10.0pt;font-family:"Verdana","sans-serif"'> </span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-GB style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>So, does anyone have any pointers to public articles that show that, so that we can go in and fix the Wikipedia article?</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-GB style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>(Phoronix’ latest at <a href="http://www.phoronix.com/scan.php?page=article&item=gcc-61-clang39&num=1" target="_blank">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).</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-GB style='font-size:10.0pt;font-family:"Verdana","sans-serif"'> </span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-GB style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>Thanks</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-GB style='font-size:10.0pt;font-family:"Verdana","sans-serif"'> </span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-GB style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>-- Jim<br><br>James Cownie <<a href="mailto:james.h.cownie@intel.com" target="_blank">james.h.cownie@intel.com</a>><br>SSG/DPD/TCAR (Technical Computing, Analyzers and Runtimes)</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-GB style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>Tel: <a href="tel:%2B44%20117%209071438" target="_blank">+44 117 9071438</a></span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-GB> </span><o:p></o:p></p><p><span lang=EN-GB>---------------------------------------------------------------------<br>Intel Corporation (UK) Limited<br>Registered No. 1134945 (England)<br>Registered Office: Pipers Way, Swindon SN3 1RJ<br>VAT No: 860 2173 47</span><o:p></o:p></p><p><span lang=EN-GB>This e-mail and any attachments may contain confidential material for<br>the sole use of the 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