Pathscale/PGI Optimisation Options

[Timothy Stitt]

Hi all,

I am just curious if anyone has experimented with the various
optimisation options available with the PGI/Pathscale compilers and can
suggest a set of parameters for either compiler which maximise the
performance of the final PETSc build.

In the past I typically use the default optimisation settings provided
by  PETSc out of the box. The target platform is a Cray XT series machine.

Thanks in advance,

Tim.