[petsc-users] Threaded Petsc

[Barry Smith]

On Oct 15, 2012, at 11:35 PM, Subramanya G <subramanya.g at gmail.com> wrote:

> Hi,
> When I try to run the example suggested with -dm_vector_type  pthread
> , I get  a unknown vector type error.

   That documentation is out of date. Please let us know where you saw this "suggestion" so we can remove it.

   Barry


> 
> Unknown vector type: pthread!
> 
> 
> 
> Here are my configure lines
> Configure options --download-mpich --download-f-blas-lapack
> --download-scientificpython --download-fiat --download-generator
> --download-chaco --download-triangle --with-shared-libraries
> --download-metis --download-parmetis --download-umfpack
> --download-hypre --sharedLibraryFlags=-fPIC -shared
> --with-pthreadclasses
> 
> 
> 
> I am using the latest Petsc Dev version.
> Does anybody have any idea what might be wrong? It built without any
> issues. Do I need to do anything else when I configure.
> 
> Subramanya G Sadasiva,
> 
> Graduate Research Assistant,
> Hierarchical Design and Characterization Laboratory,
> School of Mechanical Engineering,
> Purdue University.
> 
> "The art of structure is where to put the holes"
> Robert Le Ricolais, 1894-1977
> 
> 
> On Mon, Oct 15, 2012 at 5:44 PM, Barry Smith <bsmith at mcs.anl.gov> wrote:
>> 
>> On Oct 15, 2012, at 7:38 PM, Subramanya G <subramanya.g at gmail.com> wrote:
>> 
>>> Hi ,
>>> I need iterative solvers for some of my code and I was planning to use
>>> petsc for it. Owing to the fact that some other parts of my code
>>> aren't parallelizable, I can't use petsc in parallel. However, I see
>>> that petsc can do threads now.. I have a small question about this .
>>> Does this allow me to assemble a matrix in the main thread. and then
>>> when solve is called will petsc take care of using multiple threads?
>> 
>>   Yes
>> 
>>> Will this give me any speed ups?
>> 
>>  Yes
>> 
>>   You need to use petsc-dev for this functionality and let us know if you have difficulties.
>> 
>>   Barry
>> 
>>> Thanks/
>>> Subramanya G Sadasiva,
>>> 
>>> Graduate Research Assistant,
>>> Hierarchical Design and Characterization Laboratory,
>>> School of Mechanical Engineering,
>>> Purdue University.
>>> 
>>> "The art of structure is where to put the holes"
>>> Robert Le Ricolais, 1894-1977
>>