Hi all,
I want to play around with algebraic multi-grid parameters to optimize
performance for my 3D problems but I don't have a good idea of where to
start. Don't really see a detailed reference or tutorial for tuning these
parameters in the PETSc manual.
Can someone point me to a good paper/ref
On Wed, Aug 3, 2016 at 4:57 PM, Andrew Ho wrote:
> It will not be periodic since periodic meshes in Plex are topologically
>> periodic, meaning that
>> there is no separate aliasing array. I could possibly read in the GMsh
>> thing and do surgery
>> on the mesh.
>>
>
> I'm not sure what you mean
>
> It will not be periodic since periodic meshes in Plex are topologically
> periodic, meaning that
> there is no separate aliasing array. I could possibly read in the GMsh
> thing and do surgery
> on the mesh.
>
I'm not sure what you mean by this, but being able to handle periodic
domains is imp
On Wed, Aug 3, 2016 at 4:39 PM, Xiangdong wrote:
> Hello everyone,
>
> If I want to turn off the line search and always use the full newton step,
> does the option "-snes_linesearch_type basic" guarantee this? In my case, I
> found that even with that option, it still try to do function evaluatio
Hello everyone,
If I want to turn off the line search and always use the full newton step,
does the option "-snes_linesearch_type basic" guarantee this? In my case, I
found that even with that option, it still try to do function evaluation at
a point different from the exact newton step. Any sugg
On Sat, Jul 30, 2016 at 1:35 PM, Andrew Ho wrote:
> Is there a reason the physical groups aren't sufficient for handling this?
> As far as I can tell, this is the only way in GMsh to have any kind of
> grouping of elements.
>
> The Gmsh file format can be found here (happens to be the ASCII versi
OK so I just ran the example under valgrind, and if I use two VecViews, it
complains about following leak:
==66838== 24,802 (544 direct, 24,258 indirect) bytes in 1 blocks are
definitely lost in loss record 924 of 926
==66838==at 0x19EBB: malloc (in
/usr/local/Cellar/valgrind/3.11.0/lib/va
On Wed, Aug 3, 2016 at 10:59 AM, Matthew Knepley wrote:
> On Tue, Aug 2, 2016 at 12:40 PM, Mohammad Mirzadeh
> wrote:
>
>> I often use the memory usage information in log_view as a way to check on
>> memory leaks and so far it has worked perfect. However, I had long noticed
>> a false-positive r
This should be fixed in the master branch
> On Aug 1, 2016, at 11:13 PM, Safin, Artur wrote:
>
> Hello,
>
> I am running some code that employs gamg preconditioning within a fieldsplit,
> and for sufficiently large/refined meshes, I am getting the following error:
>
> ---
This is ixed in the master branch of PETSc.
Barry
> On Aug 1, 2016, at 11:13 PM, Safin, Artur wrote:
>
> Hello,
>
> I am running some code that employs gamg preconditioning within a fieldsplit,
> and for sufficiently large/refined meshes, I am getting the following error:
>
>
On Thu, Jul 28, 2016 at 1:31 PM, Andrew Ho wrote:
> I am trying to implement a discontinuous Galerkin discretization using the
> PETSc DM features to handle most of the topology/geometry specific
> functions. However, I'm not really sure which direction to approach this
> from since DG is kind of
On Tue, Aug 2, 2016 at 12:40 PM, Mohammad Mirzadeh
wrote:
> I often use the memory usage information in log_view as a way to check on
> memory leaks and so far it has worked perfect. However, I had long noticed
> a false-positive report in memory leak for Viewers, i.e. destruction count
> is alwa
Are you saying it works for a while but fails when the problem is
large, or that it never works with fieldsplit_1?
And how many processors are you using?
On Mon, Aug 1, 2016 at 9:13 PM, Safin, Artur wrote:
> Hello,
>
>
> I am running some code that employs gamg preconditioning within a
> fieldsp
On Tue, Aug 2, 2016 at 8:22 AM, Maximilian Hartig
wrote:
> Hello all,
>
> I would like to run a transient problem with PetscFE. Example ex11.c seems
> relevant since it uses the PestcFV context to create boundary conditions
> and RHS Functions for the TS.
> Is there an easy way to do transient an
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