Re: [Libmesh-users] threads in libmesh

[John P. <pet...@cf...>]

On Thu, Jan 14, 2010 at 10:32 AM, Roy Stogner <roy...@ic...> wrote:
>
> On Thu, 14 Jan 2010, Joa Ljungvall wrote:
>
>> However, some threading would be nice... I tried to compile libmesh
>> with --enable-tbb and then running example 14, but no threads
>> around? Any ideas?
>
> I'm afraid that some of the best threading examples are in Ben's
> private application code, but there are some examples in the library
> that you could examine.  The simplest are probably the ones in
> MeshTools.  The remaining complication for assembly is that you need
> to hold a mutex around the add_vector() and add_matrix() calls to make
> sure they aren't called from two threads at once.

System::project_vector is threaded too, and that should actually be
used by ex14.

-- 
John