[petsc-dev] configuring hypre on batch system

Barry Smith bsmith at mcs.anl.gov
Thu Jan 8 20:27:39 CST 2015


> On Jan 8, 2015, at 8:14 PM, Mark Adams <mfadams at lbl.gov> wrote:
> 
> Thanks Barry,
> 
> I thought this worked at some point ...

   Yeah it depends on how the hypre (and other packages) configure handles the system, if the their configure passes then they will go through ok.

> anyway I would like to get some threaded examples of AMG.
> 
> I know that this applications solves will not run faster with threads, they are latency bound, but I need to demonstrate this with data.  I need to say the solve is threaded on Titan. If I use CG + GAMG with threads: 
> 
> -threadcomm_nthreads 8 
> -threadcomm_affinities 0 1 2 3 4 5 6 7  ?????

I    don't know what the flag is here

> -threadcomm_type openmp
> 
> Then would I get threaded MatVec and other CG + MG stuff?  I know this will not be faster but I just need data to corroborate what we all know.  And I don't care about setup.

  Depends on the smoother, we don't have any threaded SOR, if you using Jacobi + Cheyby it will be threaded. 

  Barry

> 
> Mark
> 




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