[Paraview] Issues with PVSB 5.2 and OSMesa support

[Chuck Atkins]

Hi Michel,

However, it starts to become tricky when I use pvserver with OSMesa support.
> It appears the resulting pvserver with OSMesa support compiled in Release
> mode always crashes when I try to load data,
>

Which compiler are you building with and type of CPUs are available on the
node you're running on?  There is a known issue with llvmpipe and the Intel
compiler causing segfaults.  If youre CPU is new enough (supports AVX) then
you can use the swr driver.  See
http://www.paraview.org/Wiki/ParaView_And_Mesa_3D#Using_the_llvmpipe_and_swr_drivers
for details on switching between llvmpipe and swr drivers and adjusting the
number of threads used by each one.
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