[petsc-dev] ts_monitor_solution_vtk does not work when used with DMComposite

[Jed Brown]

Mani Chandra <mc0710 at gmail.com> writes:

> I have a heavy residual evaluation function which I cannot seem to
> vectorize at all, so then I tried changing the global data layout putting
> each variable in a contiguous chunk and it finally does vectorize. 

I suggest locally extracting from interlaced to fill vector registers at
the cell level (e.g., group of a 4 cells).  The memory performance
(number of streams and cache reuse) is better with interlaced and if you
have enough flops that local vectorization matters, packing will be
cheap.
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