Excellent. What was the symptom in te sparsity pattern?
I'll be flying most of the day, hopefully that'll provide me some time to stare
at this....
-Ben
On Feb 8, 2012, at 3:16 AM, "Derek Gaston"
<fried...@gmail.com<mailto:fried...@gmail.com>> wrote:
Win. Between fixing the localize() issue I brought up earlier and de-threading
SparsityPattern::Build() my job now ran! Hopefully the others will continue to
run as well.
Derek
On Wed, Feb 8, 2012 at 1:07 AM, Derek Gaston
<fried...@gmail.com<mailto:fried...@gmail.com>> wrote:
Continuing my "huge run" witch hunt... I have really big runs that are hanging
at mutexes during threaded execution of SparsityPattern::Build().
The main issue seems to stem from DofMap::dof_indices(). Everything is getting
hung around allocating / deallocating std::vector<int> objects (memory
operations require mutexes). I see that there were a few added for support of
SCALAR variables. I don't have any SCALAR variables in this simulation... and
in that situation there shouldn't be any overhead for adding indicies for
SCALAR variables. I think all of the scalar variable stuff could be moved off
into one small portion of that function and guard it with the number of scalar
variables in the system.
I have to say: DofMap:dof_indices() has been showing up in my profiling studies
for a while (even on small workstation sized jobs) but I haven't had a chance
to look at it.
I'm going to take an intensive look at this function soon (maybe tomorrow) but
it's 1AM right now and I'm just going to turn off threading of this section all
together and see if I can get these jobs to go through.
I just thought I would point this out in case anyone else wanted to check it
out or provide opinions...
Derek
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