[petsc-dev] ParMETIS change

[Barry Smith]

   We made the policy change to always by default to use single precision ParMetis instead of making it depend on the precision of PETSc.

   The savings is about memory usage, not about speed. Plus Jed says that nothing ParMetis does is affected by using single precision.

   is there a reason you cannot just have your code use single precision related to ParMetis?

   Barry


> On Sep 13, 2017, at 8:41 AM, Eric Chamberland <Eric.Chamberland at giref.ulaval.ca> wrote:
> 
> Hi,
> 
> having trouble to compile our code with PETSc-master new defaults options for PARMEtis.
> 
> Parmetis was using double precision before...
> 
> By curiosity, is there a big performance gain to use float?
> 
> Thanks,
> 
> Eric
> 
>