Pathscale/PGI Optimisation Options

Timothy Stitt tstitt at
Wed Jan 9 01:36:40 CST 2008


I fully understand your position regarding getting time for this type of
activity so I am hoping that some users can divulge some of this I would be surprised that it hasn't been tried before.

If I don't hear anything in reasonable time, I'll do some investigation
myself and would be more than happy to pass any findings on to the PETSc


Barry Smith wrote:
>    It would be great if we could collect this kind of information;
> unfortunately
> the PETSc team doesn't have time to try the many combinations. If anyone
> has determined good options for particular machines we'd love to add
> them to the PETSc website.
>    Barry
> On Jan 8, 2008, at 9:05 AM, Timothy Stitt wrote:
>> 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.

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