Re: Adding OpenMP support for some of the GSL functions

[Maxime Boissonneault <maxime.boissonneault@calculquebec.ca>]

Hi Rhys,
I am not sure if you mean parallelizing the for loop in this code, but 
this would not work, as each iteration is not independent from the next 
one. Differential equation solving is intrinsically serial.

I can not either just split the problem into smaller chunks (lets say 
100k istead of 1M), because they are coupled, i.e. func can only be 
defined for the whole system, not for some of its parts.


Thanks,

Maxime


Le 2012-12-12 16:36, Rhys Ulerich a écrit :
>> I have not, since it is much simpler to add 6 pragmas to the loops of
>> rk45_apply to achieve the same goal.
> I suspect, from glancing at the first example at
> http://www.gnu.org/software/gsl/manual/html_node/ODE-Example-programs.html,
> you could achieve parallelization atop stock GSL builds with fewer
> than 6 pragmas.
>
> I also suspect that by using OpenMP tasks over the coarser granularity
> concept (1 ODE) instead of the parallel-fors over the finer
> granularity method (1 step) you may see better overall performance.
>
> - Rhys