[petsc-users] Threaded Petsc

[Barry Smith]

   Ok, thanks. Shri will update them with the latest info tomorrow. Sorry for the confusion. (they are easier :-)).

    Barry


On Oct 15, 2012, at 11:57 PM, Subramanya G <subramanya.g at gmail.com> wrote:

> 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   That documentation is out of date.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
>>>> 
>>