dolfin team mailing list archive

[Anders Logg <logg@xxxxxxxxx>]

On Wed, May 05, 2010 at 09:11:21AM +0100, Garth N. Wells wrote:
>
>
> On 03/05/10 14:04, Anders Logg wrote:
> >I've been going through all benchmarks and made changes to get
> >everything to compile and run properly. I've also made adjustments to
> >some parameters to get reasonable running times.
> >
> >I'm currently working on the parallel speedup benchmark (fem/speedup)
> >but then I think we should be in pretty good shape (for now).
> >
> >It would be good for everyone that has any interest in the benchmark
> >suite to take a look now at all the benchmarks and see if something
> >can be improved. As mentioned before, Johannes will backport at least
> >some of the benchmarks to earlier versions and then it becomes very
> >important that we keep the benchmarks fixed. We can't artibrarily go
> >in and change say a mesh size or form since that would break the
> >history.
> >
> >So speak now or forever hold your peace.
> >
>
> I won't be able to look at the benchmarks for a while, but I would
> like to have benchmarks to cover some areas where I know DOLFIN
> could do with some performance improvements. Off the top of my head
> two areas are:
>
> - Assembly of forms with many coefficients (calls to eval(..) are slow)

It is easy to add more test cases to bench/fem/assembly/cpp/. Ideally,
they should be added before recording historical data. Both individual
and total running time is recorded so only the total time would be
messed up if we add a new test case, but if we want historical timings
for handling of coefficients (which might be important since that is
something we have been changing around) we should add it now.

Do you have any particular case(s) in mind? It's very easy to add so
we could do it quickly.

> - Repeated solution of linear systems (reuse of preconditioners,
> reuse of symbolic factorisation, etc)

Those are new test cases so they can just be added when we feel like
it (but we might not get historical data).

--
Anders

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