[Nek5000-users] Problem using genmap with large numbers of elements

[nek5000-users at lists.mcs.anl.gov]

I usually run genmap in 64 bit precision --- 

To me, it looks like maketools does not build it this way ?  (Or am I mis-reading the script?)

I'm looking at tools/genmap/makefile ...

genmap can be built with -r8

I'm not certain about the other tools.   Certainly n2to3 could be build with -r8

Paul

________________________________________
From: nek5000-users-bounces at lists.mcs.anl.gov [nek5000-users-bounces at lists.mcs.anl.gov] on behalf of nek5000-users at lists.mcs.anl.gov [nek5000-users at lists.mcs.anl.gov]
Sent: Thursday, December 22, 2016 7:52 AM
To: nek5000-users at lists.mcs.anl.gov
Subject: Re: [Nek5000-users] Problem using genmap with large numbers of elements

Yes, this bug is reported here https://github.com/Nek5000/Nek5000/issues/125 but has not been resolved yet.
Stefan


-----Original message-----
> From:nek5000-users at lists.mcs.anl.gov <nek5000-users at lists.mcs.anl.gov>
> Sent: Thursday 22nd December 2016 0:23
> To: nek5000-users at lists.mcs.anl.gov
> Subject: Re: [Nek5000-users] Problem using genmap with large numbers of elements
>
>
> Dear Ricardo,
>
> I believe there is a fix to this... I'm not 100% certain of the status in the repo.
>
> Perhaps one of the other developers is aware...
>
> Will try to find out more.
>
> Best, Paul
>
> ________________________________________
> From: nek5000-users-bounces at lists.mcs.anl.gov [nek5000-users-bounces at lists.mcs.anl.gov] on behalf of nek5000-users at lists.mcs.anl.gov [nek5000-users at lists.mcs.anl.gov]
> Sent: Wednesday, December 21, 2016 3:21 PM
> To: nek5000-users at lists.mcs.anl.gov
> Subject: [Nek5000-users] Problem using genmap with large numbers of elements
>
> Dear Nek Users,
> We are about to set up a new case with about 29692 in 2D, which we
> would like to extrude to about 150 elements in 3D, giving a total of
> about 30k times 150 = 4.5M elements. n2to3 works fine, but genmap
> gives a "periodic mismatch error". Having a lower number of extrusion
> elements, say 30k times 70 = 2.1M elements, works fine. Changing the
> tolerance in genmap does not fix it.
>
> Before diving into the code of n2to3 and genmap, we wanted to ask
> whether somebody has experienced that before, and whether you'd know a
> potential fix for the problem.
>
> We used both an older version of genmap and the latest github version.
>
> Thanks a lot!
> Ricardo
>
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