<div dir="ltr">HI Alexey ,<br><div class="gmail_extra"><br><br><div class="gmail_quote">On Fri, May 30, 2014 at 6:52 AM, Alexey Shvetsov <span dir="ltr"><<a href="mailto:alexxy@omrb.pnpi.spb.ru" target="_blank">alexxy@omrb.pnpi.spb.ru</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex">Hi!<br>
<br>
I tryed to build 5.0 branch on ARM board (dual core cortex-a7). It builds (if<br>
i define arm as allowed arch in features/gccfeatures.h) but some regression<br>
tests fails.<br></blockquote><div><br></div><div>What compiler did you use? Which tests fail?</div><div><br></div><div>Roland</div><div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex">
<br>
В письме от 30 мая 2014 12:43:29 пользователь Szilárd Páll написал:<br>
<div><div class="h5">> Hi,<br>
><br>
> A few days ago I did some sanity checks by compiling and<br>
> regressiontesting the 5.0 branch on ARM. This exercise made me realize<br>
> that the recently included Random123 library is now the single most<br>
> limiting factor when it comes to portability. In fact, as it is not<br>
> optional, v5.0 is ATM practically limited to x86* and Powerpc64 (BGQ)<br>
> architectures -- based on the docs (see <a href="http://goo.gl/YdKofG" target="_blank">http://goo.gl/YdKofG</a>)<br>
> Random123 has not been tested (let alone optimized) on anything else.<br>
> Additionally, note that the code won't even compile on non-supported<br>
> architectures, so in its current state GROMACS 5.0 won't compile on<br>
> anything else but x86* and PPC64, e.g. with gcc compilation will be<br>
> aborted by the "#error" in features/gccfeatures.h:38. Removing these<br>
> sanity checks does let the code compile on ARM and regressiontests do<br>
> pass, though.<br>
><br>
> I've exchanged a couple of emails with the developers and they suggest<br>
> that in practice Threefry should work on ARM (and perhaps other<br>
> architectures too), but testing/validation is definitely necessary.<br>
> Performance is not optimized on unsupported architectures, I assume,<br>
> so some optimization may not hurt too - especially if there are cases<br>
> where we generate many PRNGs per step (BTW has the potential overhead<br>
> been assessed?).<br>
><br>
> Cheers,<br>
> --<br>
> Szilárd<br>
<br>
--<br>
</div></div>Best Regards,<br>
Alexey 'Alexxy' Shvetsov, PhD<br>
Department of Molecular and Radiation Biophysics<br>
FSBI Petersburg Nuclear Physics Institute, NRC Kurchatov Institute,<br>
Leningrad region, Gatchina, Russia<br>
mailto:<a href="mailto:alexxyum@gmail.com">alexxyum@gmail.com</a><br>
mailto:<a href="mailto:alexxy@omrb.pnpi.spb.ru">alexxy@omrb.pnpi.spb.ru</a><br>
<div class=""><div class="h5">--<br>
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