blocked index sets

[Matthew Knepley]

On Wed, Aug 27, 2008 at 12:06 PM, Lisandro Dalcin <dalcinl at gmail.com> wrote:
> So, Do all us agree my proposed fix should be pushed? I'll wait for
> Matt comments/complaints...

I complain that IS is a fake parallel object. However, if
GetSize/GetLocalSize already
do this, then yes we should change the ISBlock version as well.

   Matt

> On Wed, Aug 27, 2008 at 1:13 PM, Barry Smith <bsmith at mcs.anl.gov> wrote:
>>
>> On Aug 27, 2008, at 10:23 AM, Matthew Knepley wrote:
>>
>>> There is no concept of global for IS. They are purely serial. AO is the
>>> only
>>> global construct with indices.
>>
>>   This is kind of true, and maybe used to be completely true. But IS does
>> have a communicator and that communicator can be MPI_COMM_WORLD or
>> any parallel communicator.  In other words the IS is evolving to be an
>> object
>> that can be parallel in the same sense as vecs or mats
>>
>>   There are already ISGetSize() and ISGetLocalSize() so it sure makes sense
>> to have the same paradgm for the ISGetBlockSize().
>>
>>
>>   Barry
>>
>> Originally IS had no parallel concept, then we added the ISGetSize/LocalSize
>> but forgot to do it for the ISBlock...
>>
>>
>>>
>>>
>>>  Matt
>>>
>>> On Wed, Aug 27, 2008 at 10:09 AM, Lisandro Dalcin <dalcinl at gmail.com>
>>> wrote:
>>>>
>>>> I believe we have to review the interface of ISBlock. Currently,
>>>> ISBlockGetSize() return the number of LOCAL block indices. This is not
>>>> consistent with other naming conventions for getting local and glocal
>>>> sizes. I propose to change this to the following
>>>>
>>>> 1) change: ISBlockGetSize() returns the number global blocks
>>>> 2) addition:  ISBlockGetLocalSize() return the number of local blocks
>>>>
>>>> Comments?
>>>>
>>>>
>>>> --
>>>> Lisandro Dalcín
>>>> ---------------
>>>> Centro Internacional de Métodos Computacionales en Ingeniería (CIMEC)
>>>> Instituto de Desarrollo Tecnológico para la Industria Química (INTEC)
>>>> Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)
>>>> PTLC - Güemes 3450, (3000) Santa Fe, Argentina
>>>> Tel/Fax: +54-(0)342-451.1594
>>>>
>>>>
>>>
>>>
>>>
>>> --
>>> What most experimenters take for granted before they begin their
>>> experiments is infinitely more interesting than any results to which
>>> their experiments lead.
>>> -- Norbert Wiener
>>>
>>
>>
>
>
>
> --
> Lisandro Dalcín
> ---------------
> Centro Internacional de Métodos Computacionales en Ingeniería (CIMEC)
> Instituto de Desarrollo Tecnológico para la Industria Química (INTEC)
> Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)
> PTLC - Güemes 3450, (3000) Santa Fe, Argentina
> Tel/Fax: +54-(0)342-451.1594
>
>



-- 
What most experimenters take for granted before they begin their
experiments is infinitely more interesting than any results to which
their experiments lead.
-- Norbert Wiener