On Fri, Jan 15, 2016 at 6:15 PM, Bhalla, Amneet Pal S <[email protected]> wrote:
> > > On Jan 15, 2016, at 3:53 PM, Jed Brown <[email protected]> wrote: > > Do you need to create new objects versus merely resetting them? I > suspect that calling KSPReset() between timesteps instead of creating a > new object and calling KSPSetFromOptions() will fix your performance > woes. > > > We definitely need to destroy Mat associated with KSP everytime. This is a > dynamic fluid-structure > interaction problem on AMR grid, where the Cartesian grid and the > structure moves at every timestep. > Is it possible to reset a KSP with a different Mat? Are you suggesting to > call KSPCreate() and > KSPSetFromOptions() only once at the beginning of simulation, KSPReset() > after every timestep, > and KSPDestroy() at the end of the simulation? > That is how KSPReset() is supposed to work, but no one is really exercising it now. I am inclined to try Barry's experiment first, since this may have bugs that we have not yet discovered. However, Jed is correct that this is probably the best design. Matt -- What most experimenters take for granted before they begin their experiments is infinitely more interesting than any results to which their experiments lead. -- Norbert Wiener
