dolfin team mailing list archive

[Nuno Lopes <question95433@xxxxxxxxxxxxxxxxxxxxx>]

Question #95433 on DOLFIN changed:
https://answers.launchpad.net/dolfin/+question/95433

    Status: Answered => Open

Nuno Lopes is still having a problem:
>Is the only substantial slow down in the cell assembly?

I guess not!
This timings are achieved with only 1 Timer:
"Timer("X:DOLFWAVE:END");"
and the LU solver, in this example is called at least 300 times.
Why does it  only appears with 1 repetition in summary?

>Are you using the '-O' flag with FFC? This was on by default, but now
>seems to be off by default.
I've recompiled the forms with the latest  stable ffc with -O and I get:

Summary of timings          |  Average time  Total time  Reps
-----------------------------------------------------------
Assemble cells                   |      0.010832       16.01  1478
Assemble exterior facets  |         0.015        0.03     2
Build sparsity                      |             0           0  1478
Delete sparsity                   |             0           0  1478
Init tensor                            |             0           0  1478
LU solver                             |          0.03        0.03     1
X:DOLFWAVE:END           |         83.71       83.71     1

Improvements in cell assemble. 
But worst results in exterior facets assemble.

-- 
You received this question notification because you are a member of
DOLFIN Team, which is an answer contact for DOLFIN.