ISCreateGeneral just takes your indices and caches them. But it is a synch point. What ratio (max/min) is PETSc reporting in this data?
On Sun, Jul 5, 2020 at 1:51 PM Y. Shidi <ys...@cam.ac.uk> wrote: > Dear developers, > > I am currently doing a weak scaling test, and find that > the weak scaling results for ISCreateGeneral() is very bad. > For 2, 4, 8 processors, the running times for completing > ISCreateGeneral() are: > 0.687494, 3.00597 and 10.0613. > I am not sure if this is normal. > > Thank you for your time. > > Kind Regards, > Shidi >
