[bddcml-users] bddcml : example ?

[Jakub Sistek]

Hello,

sorry about the missing examples. However, an example is attached. It is 
quite recent, and it is contained within the version on git. It should 
go to the examples/ subdirectory (as well as the updated Makefile). I 
recommend anyway to use the version downloaded from git, as there are 
some major changes important for scalability on very large numbers of 
cores. The example creates a simple mesh on a cube and solves a Poisson 
equation on it. I hope the example is reasonably commented and sort of 
self-explanatory. No input data are needed for it.
To run it, you just need to specify
mpirun -np X poisson_on_cube NUM_EL_PER_SUB_EDGE NUM_SUB_PER_CUBE_EDGE 
NLEVELS
where
X - is number of processes
NUM_EL_PER_SUB_EDGE - number of cubic elements on an edge of a 
subdomain, known as H/h in DD theory
NUM_SUB_PER_CUBE_EDGE - number of cubic subdomains on an edge of the 
unit cube
NLEVELS - number of levels employed by BDDC, say 2,3,4 are reasonable values

I will be happy if you let me know about your experience with the code.

Best wishes

Jakub


On 06/13/2013 11:06 PM, bob wrote:
>
> Hello,
>
> Do you plan to provide a complete example (mesh, matrices ...) to test 
> the code in the next release or on the website?
>
>
> Thanking you in advance
>
> Bob 


-- 
Jakub Sistek, Ph.D.
Institute of Mathematics of the AS CR
http://www.math.cas.cz/~sistek
tel: (+420) 222 090 710

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# general setting on system (compiler, flags, libraries)
include ../make.inc

# include files needed
# libraries needed
LIBS = $(BDDCML_LINK_SEQUENCE) 
EXAMPLES = bddcml_global bddcml_local poisson_on_cube
##############################################################
# GNU Make automatic variables:
# $@ - target
# $^ - all prerequisities
# $< - first prerequisity
# rules
all: $(EXAMPLES)

# general rule s for compiling objects
%.o : %.f90
	$(BDDCML_MPFC) $(BDDCML_MPFFLAGS) -I../src -c $<

# building binaries
poisson_on_cube: \
   poisson_on_cube.o \
   $(LIBBDDCML)
	$(BDDCML_MPFC) $(BDDCML_MPFFLAGS) -o $@ $^ $(LIBS) 

bddcml_global: \
   bddcml_global.o \
   $(LIBBDDCML)
	$(BDDCML_MPFC) $(BDDCML_MPFFLAGS) -o $@ $^ $(LIBS) 

bddcml_local: \
   bddcml_local.o \
   $(LIBBDDCML)
	$(BDDCML_MPFC) $(BDDCML_MPFFLAGS) -o $@ $^ $(LIBS) 
clean:
	-rm -f *.o *.mod $(EXAMPLES)