[Paraview] Xdmf wrappers for our HDF5
clarke at arl.army.mil
Tue Aug 26 11:13:33 EDT 2008
Has the large grid ever worked in the past ... I may have
broken the extents when I modified the parallelism for spatial
If I broke the parallelism, that might explain the slowness
on smaller grids.
I'm assuming that the Xdmf xml just specifies a single
Jean Favre wrote:
> Eric E. Monson wrote:
>> We use the Xdmf wrappers for our HDF5 for now.
> I am still encounteering major difficulties with Xdmf (cvs version of
> yesterday). Speed and Memory. When reading in parallel for example, the
> Xdmf reader attemps to allocate memory for the WHOLE grid on every node
> (independent of the number of pvserver nodes) causing memory crashes.
> There must be a problem reading the Extents. Using straight HDF5, I pass
> the Extents as hyperslabs and it works fine. I can read 2048^3 in
> parallel. For smaller grids, if memory is not a problem, the Xdmf
> wrapper works too, still considerably slower.
> Jean -- Swiss National Supercomputing Centre
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