Come here to close this issue as it turned out to be an issue related to
the reflective boundary condition in the weak form. When the boundary
condition is turned off, solution will always be correct however number of
processors is used.
But thanks for the discussions here.
在 2017年7月7日星期五 UTC-
Appreciated. I'll try this idea out.
Sent from my iPhone
> On Jul 7, 2017, at 16:47, Wolfgang Bangerth wrote:
>
>> On 07/06/2017 06:25 PM, Weixiong Zheng wrote:
>> I suspect it would not be about the weak form directly. So, every time I
>> give an set of initial cells, I need to make sure tota
On 07/06/2017 06:25 PM, Weixiong Zheng wrote:
I suspect it would not be about the weak form directly. So, every time I give
an set of initial cells, I need to make sure total initial cell number
N_cell_tot % n_process == 0. If this condition is fulfilled, solution will
always be correct. Say,
No adaptivity.
I suspect it would not be about the weak form directly. So, every time I
give an set of initial cells, I need to make sure total initial cell number
N_cell_tot % n_process == 0. If this condition is fulfilled, solution will
always be correct. Say, I want to use 5 processors, then
I suspect it would not be about the weak form directly.
So, every time I give an set initial cells, I need to make sure total
initial cell number N_cell_tot % n_process == 0. If this condition is
fulfilled, solution will always be correct.
Say, I want to use 5 processors, then I have to give N_
On 07/06/2017 09:02 AM, Weixiong Zheng wrote:
Both are generated with subdivided hyper rectangle with same reps and diagonals.
And no adaptive refinement?
In that case, the solution *should* be the same, assuming your linear solver
tolerance is small enough. If it isn't, there is probably a b
Both are generated with subdivided hyper rectangle with same reps and diagonals.
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Weixiong,
When solving my problem with PETScWrappers using MPI, I saw sth interesting. I
ran my test problem on my Mac with 4 core 8 threads. When using under 4
process, that is "mpirun -np 4 xxx", results are always right. When trying 6
process, "mpirun -np 6 xxx", results are weird (right r
