[petsc-users] Threaded Petsc

[Subramanya G]

Hi Barry,
These are the instructions that I found.
Thanks.

http://www.mcs.anl.gov/petsc/petsc-dev/docs/installation.html#threads

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 9:49 PM, Barry Smith <bsmith at mcs.anl.gov> wrote:
>
> 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    That documentation is out of date.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
>>>
>