Performance under Windows vs. Linux?

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mzenker
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Performance under Windows vs. Linux?

Post by mzenker » 05 Jun 2018, 15:19

Hi,

does anyone have experience with Elmer performance under Windows (10) vs. Linux, or are there any comparisons Windows vs. Linux on the same (or comparable) hardware?
I might have the option to get a dedicated simulation machine where I have the choice of OS.

Thanks for any hint,

Matthias

annier
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Re: Performance under Windows vs. Linux?

Post by annier » 05 Jun 2018, 16:01

Matthias,
Considering the fact that Elmer team is developing ppa repository for Ubuntu Linux, I would opine for it.
I do not have any experience with Elmer in windows. Still many of my peers want to use Elmer with windows, as windows has a large user base.
If you are talking of computational performance and code updates, linux environment is more adaptive.
If you are mentioning of the numbers of users (opting to choose the OS), windows environment is more adaptive.

Yours Sincerely,
Anil Kunwar
Anil Kunwar
Department of Materials Engineering, KU Leuven, Belgium

mzenker
Posts: 1988
Joined: 07 Dec 2009, 11:49
Location: Germany

Re: Performance under Windows vs. Linux?

Post by mzenker » 05 Jun 2018, 16:59

Hi Anil,

thanks for the quick reply. I am principally interested in performance, so if I understand correctly, this would be in favour of Linux.
Let's see if our IT guys will really agree to allow for a Linux machine in their M$-dominated world...

Matthias

mark smith
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Joined: 26 Aug 2009, 18:20
Location: Peterborough, England

Re: Performance under Windows vs. Linux?

Post by mark smith » 05 Jun 2018, 18:09

Hi Matthias,
I recently compared a CFD run on ubuntu 16.04LTS and windows 7 pro 64 running 8 threads using elmersolver_mpi and found no appreciable difference in solver times between the 2 OS's.
HTH
Regards
Mark

annier
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Re: Performance under Windows vs. Linux?

Post by annier » 05 Jun 2018, 18:47

Mark,
Thanks for the substantiated reply to Matthias' query.
Would you please enumerate the CPU times (for your parallel run) in the described CFD simulation (with the number of mesh elements, steady state iterations etc.)?


Yours Sincerely,
Anil Kunwar
Anil Kunwar
Department of Materials Engineering, KU Leuven, Belgium

mzenker
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Location: Germany

Re: Performance under Windows vs. Linux?

Post by mzenker » 06 Jun 2018, 12:43

Hi Mark,

thank you for this information. This is good news since our IT insists that there be Windows (10) on the machine - it 's just easier to handle for them...

Matthias

Takala
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Joined: 23 Aug 2009, 23:59

Re: Performance under Windows vs. Linux?

Post by Takala » 06 Jun 2018, 14:19

mzenker wrote:Hi,

does anyone have experience with Elmer performance under Windows (10) vs. Linux, or are there any comparisons Windows vs. Linux on the same (or comparable) hardware?
I might have the option to get a dedicated simulation machine where I have the choice of OS.

Thanks for any hint,

Matthias
Hi Matthias,

Being a Linux guy to the bone I don't really have experience on Windows vs. Linux. However, I have noticed that if you compile
your code and use optimization for your own hardware, this can make a difference. This can also make a difference if your operating
system can or cannot use some features that the processor has to offer. I have seen really huge differences (I don't
have numbers to show though). You can also use different math libraries which also makes a difference.

On this note, when you compare, you should have the same optimization flags and the same libraries.

Compilers can also make a difference.

Best Regards,

Eelis

mzenker
Posts: 1988
Joined: 07 Dec 2009, 11:49
Location: Germany

Re: Performance under Windows vs. Linux?

Post by mzenker » 06 Jun 2018, 16:10

Hi Eelis,

thanks for the additional hints. I am also more a Linux than a Windoze guy, but my company doesn't give me the choice...
So when the machine is set up (some time this summer), I will try to compile ElmerSolver on that machine after a closer look into the optimization flags and math libraries. I will come back to the forum with questions and reports on success and failure...

Matthias

Wassink
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Re: Performance under Windows vs. Linux?

Post by Wassink » 16 Jun 2018, 15:19

So there are pluses and minuses for both of those platforms. Not surprised at all. This is how it usually is, right?

mzenker
Posts: 1988
Joined: 07 Dec 2009, 11:49
Location: Germany

Re: Performance under Windows vs. Linux?

Post by mzenker » 18 Jun 2018, 11:22

Exactly. Anyway, it was not my intention to discuss Windows vs. Linux OS, but just to find out if there are significant differences for a machine specifically intended to run simulations with Elmer...

Matthias

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