Hi John, Thanks for the response.
> I'm using KrylovSchur eigensolver >> in SLEPc and I find that the eigenvalue computation anti-scales when I use >> > > anti-scales? > Yes, I get the following scaling Processes Eigensolver time(s) 1 68.3037 2 51.9604 4 49.5286 8 66.7834 16 106.671 32 128.522 One node contains 16 processors, so the last time is for 2 nodes. > Gauss quadrature. Having a diagonal pattern in B might fix the scaling and >> increase the performance. >> >> Do you have any other suggestions on improving the scaling? >> > > Use preconditioners which scale well, like AMG, if they make sense for > your problem. > I can try using different preconditioners. How do I set the preconditioner for the eigensolver? Thanks, Harshad ------------------------------------------------------------------------------ Site24x7 APM Insight: Get Deep Visibility into Application Performance APM + Mobile APM + RUM: Monitor 3 App instances at just $35/Month Monitor end-to-end web transactions and take corrective actions now Troubleshoot faster and improve end-user experience. Signup Now! http://pubads.g.doubleclick.net/gampad/clk?id=272487151&iu=/4140 _______________________________________________ Libmesh-users mailing list Libmesh-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/libmesh-users