[petsc-dev] PLAPACK problems

Barry Smith bsmith at mcs.anl.gov
Wed Mar 17 11:36:27 CDT 2010

   Poor Jack, he should change his name immediately.


On Mar 17, 2010, at 11:34 AM, Matthew Knepley wrote:

> On Wed, Mar 17, 2010 at 12:30 PM, Barry Smith <bsmith at mcs.anl.gov>  
> wrote:
>   Some of the PETSc examples are crashing under some circumstances  
> (like with complex) using PLAPACK and valgrind is showing  
> uninitialized variables etc in PLAPACK code. I don't want to debug  
> PLAPACK code, so will let it go for this release.
>  BUT, is there something else we can move to for petsc-dev in the  
> future. Should we throw away the use of PLAPACK and use FLAMELIB?  
> Should we switch to ScaLAPACK (just kidding?). I hate to bag dense  
> parallell matrices from PETSc completely but don't want to spend a  
> lot of time on whatever we do support.
> Perhaps there should be a map of Robert's software empire. However,  
> these things are disjoint:
>   - FLAME: Serial LA algorithms generated from a worksheet  
> specification
>   - PLAPACK: Distributed parallel LA
>   - FLASH: Multicore parallel LA generated from worksheet  
> specification
>   - Jack's code: Update of PLAPACK which has much better scalability
> Of course, I want to switch to the later. I am going to talk to Jack  
> about this when I am in Austin. He is
> now the grad student of Lexing Ying, who if you don't know him, you  
> really should check him out.
>    Matt
>    Barry
> -- 
> 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

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