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> 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
>
------------------------------------------------------------------------------
Keep Your Developer Skills Current with LearnDevNow!
The most comprehensive online learning library for Microsoft developers
is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3,
Metro Style Apps, more. Free future releases when you subscribe now!
http://p.sf.net/sfu/learndevnow-d2d
_______________________________________________
Libmesh-devel mailing list
Libmesh-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/libmesh-devel
