<div dir="ltr">I'm confused. Your order is that espresso must be implemented in virtualbox? I have worked with this software. and the loss of efficiency is very high. Efficiency is very important in my work. In any case, I am willing to cooperate with you to test its performance.<br>
<div><br></div><div><br></div><div dir="rtl"><br></div><div>best regards</div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Thu, Sep 4, 2014 at 11:19 PM, Axel Kohlmeyer <span dir="ltr"><<a href="mailto:akohlmey@gmail.com" target="_blank">akohlmey@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="">On Thu, Sep 4, 2014 at 8:19 PM, siddheshwar chopra <<a href="mailto:sidhusai@gmail.com">sidhusai@gmail.com</a>> wrote:<br>
> Dear Sir,<br>
> I willing to run QE on my Windows xp (with 2 GB RAM and dual core 2.7 GHz<br>
> cpu) and windows 7 (with 2GB RAM and i3 2.2 GHz ) machines..<br>
> Sir I would be glad if you could clarify one doubt.. Is will there be any<br>
> DEGRADATION of QE performance on windows, as compared to linux?<br>
> I have used cygwin and virtualbox and found severe performance degradations.<br>
<br>
</div>the executables are compiled with a mingw cross-compiler on a linux<br>
machine. so the performance should be equivalent to what you achieve<br>
with gfortran and gcc on a linux box. compared to cygwin it is likely<br>
a bit faster. at least that is what people found with a different<br>
package.<br>
<br>
there are a few things where windows is better than linux and some<br>
other things where it is worse. it depends a lot on the specific<br>
windows version. with numerical codes like QE, often the compiler and<br>
optimized BLAS/LAPACK libraries is the biggest impact. with virtual<br>
machines, the problem is often the limited amount of RAM. if you care<br>
about performance, obtain an academic license for the intel compilers<br>
with MKL and run on a linux machine. it is well worth the money (often<br>
cheaper than the equivalent CPU upgrade)<br>
<br>
the primary motivation to provide windows binaries is to make QE more<br>
accessible for classrooms and tutorials and for people that want to<br>
run tests on their own machine (not everybody runs linux on their<br>
laptops) before sending larger versions of the same calculation to a<br>
cluster or a supercomputer. so the best performance is not the highest<br>
priority.<br>
<br>
if you are able to make properly documented comparative benchmarks,<br>
i'd be happy to get to know pass that information on to other users in<br>
the documentation of the windows port.<br>
<div class="HOEnZb"><div class="h5"><br>
<br>
<br>
<br>
> I would eagerly wait for your mail regarding the download links.<br>
><br>
> Kind Regards,<br>
><br>
> On 04-Sep-2014 11:27 pm, "Axel Kohlmeyer" <<a href="mailto:akohlmey@gmail.com">akohlmey@gmail.com</a>> wrote:<br>
>><br>
>> On Thu, Sep 4, 2014 at 7:52 PM, ehsan targholi <<a href="mailto:targholi@gmail.com">targholi@gmail.com</a>> wrote:<br>
>> > Hi<br>
>> > Dear axel<br>
>> > It's a very interesting idea. I'm interested to running it in Windows<br>
>> > and in<br>
>> > parallel version. What should I do؟<br>
>><br>
>> just wait for my e-mail telling you where to find the temporary<br>
>> repository and the installer packages.<br>
>><br>
>> what kind/version of windows are you running and how much RAM and how<br>
>> many CPU cores do you have?<br>
>><br>
>> ><br>
>> ><br>
>> > best regards<br>
>> > E.Targholi<br>
>> ><br>
>> ><br>
>> ><br>
>> > On Thu, Sep 4, 2014 at 9:14 PM, Axel Kohlmeyer <<a href="mailto:akohlmey@gmail.com">akohlmey@gmail.com</a>><br>
>> > wrote:<br>
>> >><br>
>> >> hi everybody,<br>
>> >><br>
>> >> following up on my previous request last fall, i am looking again for<br>
>> >> folks that are interested to run quantum espresso on windows?<br>
>> >><br>
>> >> last fall some of you helped to improve the development version of QE<br>
>> >> so it can be compiled and run on windows machine (in serial and<br>
>> >> parallel). now i finally found the time to update this to the recent<br>
>> >> release 5.1 and built a new set of packages. before we unleash those<br>
>> >> to the general audience, and particularly inexperienced QE noobies, i<br>
>> >> want to make certain that everything works reasonably well.<br>
>> >><br>
>> >> i only have very limited access to windows (on a virtual machine) and<br>
>> >> practice with it (the compilation is done with a cross compiler on<br>
>> >> linux) and thus cannot test very thoroughly (and don't have the time),<br>
>> >> so it seem just logical to farm this out to the QE community.<br>
>> >><br>
>> >> if you are still interested, please contact me off-list with a short<br>
>> >> description of what kind of setup you are willing to test on (CPU,<br>
>> >> windows version, 32-bit or 64-bit, MPI or serial or both). i will then<br>
>> >> point you to a webpage with some instructions and a link to a<br>
>> >> repository where you can download the new packages as soon as they are<br>
>> >> available.<br>
>> >><br>
>> >> thanks,<br>
>> >> axel.<br>
>> >><br>
>> >> --<br>
>> >> Dr. Axel Kohlmeyer <a href="mailto:akohlmey@gmail.com">akohlmey@gmail.com</a> <a href="http://goo.gl/1wk0" target="_blank">http://goo.gl/1wk0</a><br>
>> >> College of Science & Technology, Temple University, Philadelphia PA,<br>
>> >> USA<br>
>> >> International Centre for Theoretical Physics, Trieste. Italy.<br>
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>> ><br>
>> ><br>
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>><br>
>><br>
>><br>
>> --<br>
>> Dr. Axel Kohlmeyer <a href="mailto:akohlmey@gmail.com">akohlmey@gmail.com</a> <a href="http://goo.gl/1wk0" target="_blank">http://goo.gl/1wk0</a><br>
>> College of Science & Technology, Temple University, Philadelphia PA, USA<br>
>> International Centre for Theoretical Physics, Trieste. Italy.<br>
>><br>
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<br>
<br>
<br>
--<br>
Dr. Axel Kohlmeyer <a href="mailto:akohlmey@gmail.com">akohlmey@gmail.com</a> <a href="http://goo.gl/1wk0" target="_blank">http://goo.gl/1wk0</a><br>
College of Science & Technology, Temple University, Philadelphia PA, USA<br>
International Centre for Theoretical Physics, Trieste. Italy.<br>
<br>
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