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[Ilmar Wilbers <ilmarw@xxxxxxxxx>]

I get almost linear speed-up now:
ilmarw@bagvapp:~/instant/tests$ export OMP_NUM_THREADS=1
ilmarw@bagvapp:~/instant/tests$ python test_omp.py
Thread 0
With instant and OpenMP 1.74 seconds process time
With instant and OpenMP 1.7381939888 seconds wall time
ilmarw@bagvapp:~/instant/tests$ export OMP_NUM_THREADS=2
ilmarw@bagvapp:~/instant/tests$ python test_omp.py
Thread 1
Thread 0
With instant and OpenMP 1.72 seconds process time
With instant and OpenMP 1.00032997131 seconds wall time

Look at the wall time.

I used Intrepid Ibex, as the bug with gcc in 4.2 (used in Hardy) with 
linking in -lgomp has been resolved there.

ilmar

kent-and@xxxxxxxxx wrote:
> I've tried, but I get 'undefined symbol omp_...'
>
> Kent
>
>
>   
> > I think -fopenmp should be enough, you don't need to link manually to
> > gomp.
> > (Note that g++ version >= 4.2 is required)
> >
> > --
> > Martin
> >
> >
> >
> > 2008/7/30 Ilmar Wilbers <ilmarw@xxxxxxxxx>:
> >     
> > > I have openmp, but is does not work here:
> > > ilmarw@multiboot:~/instant/tests$ python test_omp.py
> > > --- Instant: compiling ---
> > > Traceback (most recent call last):
> > >  File "test_omp.py", line 23, in <module>
> > >    compute_func = inline_with_numpy(c_code, arrays = [['n', 'x'], ['m',
> > > 'y']], cppargs = '-fopenmp', system_headers=["omp.h"],
> > > libraries=['gomp'])
> > >  File "/usr/lib/python2.5/site-packages/instant.py", line 791, in
> > > inline_with_numpy
> > >    exec("from inline_ext_numpy import %s as func_name"% func_name)
> > >  File "<string>", line 1, in <module>
> > >  File "/home/ilmarw/instant/tests/inline_ext_numpy/__init__.py", line
> > > 1, in <module>
> > >    from inline_ext_numpy import *
> > >  File
> > > "/home/ilmarw/instant/tests/inline_ext_numpy/inline_ext_numpy.py", line
> > > 6, in <module>
> > >    import _inline_ext_numpy
> > > ImportError:
> > > /home/ilmarw/instant/tests/inline_ext_numpy/_inline_ext_numpy.so: cannot
> > > allocate memory in static TLS block
> > >
> > > Seeing as none of the buildbots have openmp, I will disable the test for
> > > it for now.
> > >
> > > ilmar
> > >
> > > Instant wrote:
> > >       
> > > > One or more new changesets pushed to the primary instant repository.
> > > > A short summary of the last three changesets is included below.
> > > >
> > > > changeset:   165:129a6f778ab18bdb23b52624dd12343cd7e59fdf
> > > > tag:         tip
> > > > user:        "Kent-Andre Mardal <kent-and@xxxxxxxxx>"
> > > > date:        Wed Jul 30 11:44:03 2008 +0200
> > > > files:       doc/html_reference/epydoc.css
> > > > doc/html_reference/index.html doc/makedoc.sh tests/test_ode.py
> > > > tests/test_omp.py
> > > > description:
> > > > added openmp test (not working because I'm missing the omp
> > > >     dynamic library to use)
> > > >
> > > >
> > > > changeset:   164:abf5bb69a6554b54f74b0ca2bb4f5daa37a40f0a
> > > > user:        Ilmar Wilbers <ilmarw@xxxxxxxxx>
> > > > date:        Tue Jul 29 17:17:23 2008 +0200
> > > > files:       src/instant.py
> > > > description:
> > > > Added cross-platform support for cache directory and temp directory.
> > > >
> > > >
> > > > changeset:   163:224ef682ffb60b58892d69b26e459af1ca34bc62
> > > > parent:      161:067774ded47ed9745762e6b5a4ac1cc328df872f
> > > > parent:      162:0fb1ca0aaf71a33c34ad68678c43e43e993c4116
> > > > user:        Ilmar Wilbers <ilmarw@xxxxxxxxx>
> > > > date:        Tue Jul 29 10:38:28 2008 +0200
> > > > files:       tests/test16.py
> > > > description:
> > > > Merge.
> > > >
> > > >
> > > > ----------------------------------------------------------------------
> > > > For more details, visit http://www.fenics.org/hg/instant
> > > > _______________________________________________
> > > > Instant-dev mailing list
> > > > Instant-dev@xxxxxxxxxx
> > > > http://fenics.org/mailman/listinfo/instant-dev
> > > >
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