[Nek5000-users] Compiling large problem sizes
nek5000-users at lists.mcs.anl.gov
nek5000-users at lists.mcs.anl.gov
Mon Dec 4 13:57:59 CST 2017
What do you do to increase the amount of available memory?
In your current setting, Nek5000 compiles with one processor since lpmin is set to 1. You have to increase it to successfully compile.
Marco
On Dec 4, 2017, at 2:53 PM, nek5000-users at lists.mcs.anl.gov<mailto:nek5000-users at lists.mcs.anl.gov> wrote:
Hi all,
I'm trying to compile a 3D mesh with mesh size of 6000 ekements. Unfortunately I keep running into compilation errors. To be clear I can compile problems upto 3000 elements large. But setting lelt value larger than 3000 results in an error.
I have realised this might be a memory issue and have tried to compile with increasing amounts of available memory. This does not seem to resolve the issue.
To be clear my SIZE looks like this
parameter (ldim=3) ! domain dimension (2 or 3)
parameter (lx1=6) ! p-order (avoid uneven and values <6)
parameter (lxd=10) ! p-order for over-integration (dealiasing)
parameter (lx2=lx1-2) ! p-order for pressure (lx1 or lx1-2)
parameter (lelg=6000) ! max total number of elements
parameter (lpmin=1) ! min MPI ranks
parameter (lpmax=1024) ! max MPI ranks
parameter (ldimt=1) ! max auxiliary fields (temperature + scalars)
Sincerely,
--
Amitvikram Dutta
Graduate Research Assistant
Fluid Mechanics Research Lab
University of Waterloo
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