[petsc-users] AMD interlagos optimization flags

[Jed Brown]

On Tue, Mar 5, 2013 at 2:23 PM, Dharmendar Reddy <dharmareddy84 at gmail.com>wrote:

> Hello,
>         Has any one installed petsc on the AMD 6200 series processor
> systems? I have a small cluster with quad socket AMD 6274 (16Core)
> processors. Should i use any special optimization flags or let petsc
> configure script decide ?
>
> I would like have two flavors of the instillation:
>
>    1.  intel 13.2 compilers using intel mpi and intel MKL 11.0
>    2.  intel 13.2 compilers using intel mpi and ACML 5.3 compile with
>    intel. Now ACML has a weird organization of the libraries. It has same
>    names for both the 64bit and 32 bit integer libraries but saved in
>    different folders. Should i link to single thread or multithreaded acml ?
>
> Single-threaded.

No special optimization flags, but bear in mind that Intel compilers (and
MKL) have the "run slower on AMD" feature.

Compiler optimizations usually do not affect PETSc too much because most
operations are memory bandwidth limited and the compute kernels are written
in a form that is easy to optimize.
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