[petsc-users] The "DMComplexDistribute" is time-consuming

[Jed Brown]

On Sat, Aug 18, 2012 at 11:52 AM, fdkong <fd.kong at siat.ac.cn> wrote:

> Hi developers,
>
> I use DMComplex represent the unstructured mesh. Everything is OK, but the
> function "DMComplexDistribute" is always time-consuming. I guess that it
> results from using the PetscSF. I don't know why we use this communication
> model. Could you please make some tests on the function?  Or could we use
> other communication functions ?
>

1. Always send -log_summary

2. Distributing a mesh is a fairly expensive operation.

3. DMComplex is new and we are more interested in getting the right
capability than in micro-tuning performance. Mesh distribution is usually
not done frequently.
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