[petsc-users] Solving Poisson equation with multigrid

[Michele Rosso]

Thanks, but I'd rather use Cray since only a small part of my code 
relies on PETSc and, as suggested by the BW staff,
Cray-compiled code performs generally better on Cray system.

Michele

On 05/31/2013 02:57 PM, Jed Brown wrote:
> Michele Rosso <mrosso at uci.edu> writes:
>
>> Hi,
>>
>> I confirm that
>>
>>           -pc_type gamg  -pc_mg_cycle_type v  -pc_gamg_agg_nsmooths 1
>>
>> produces the correct shift in PETSc 3.4.
>> So my problem is solved.   I will upgrade to 3.4 in my productive
>> machine installation.
>> It is a Cray machine (Blue Waters). Assuming I want to use the Cray
>> compiler, which options should I use for ./configure
>> for the installation.
> Or the Intel compiler or GCC.  PETSc should run at similar speed with
> any.  IIRC, Cray recommends the Intel compiler on their machines with
> Intel CPUs.  There are examples in config/examples/.
>

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