[petsc-dev] -vecscatter_window

[Barry Smith]

On Mar 30, 2010, at 7:45 PM, Jed Brown wrote:

> On Tue, 30 Mar 2010 19:35:02 -0500, Barry Smith <bsmith at mcs.anl.gov>  
> wrote:
>>
>>    Thanks. What is your interest in using the window version of the
>> scatters? Some indication it might be better on some systems then the
>> standard message passing? Just for fun?
>
> I've seen no such indication, but someone asked about the various ways
> that scatters can operate, and after responding, I discovered that
> -vecscatter_window did not actually work.  Such things get under my
> skin so I tracked it down.

    Ahh, so you've discovered Matt and my plan. We put a lot of buggy  
code in PETSc and let you write it properly :-). Actually we don't do  
this intentionally but the result may be the same.

    Barry

>
> Jed