1*57ef82e2SBarry Smith% 2*57ef82e2SBarry Smith% Performance results for PETSc on the 2d Laplacian 5 pt stencil using GMRES and no 3*57ef82e2SBarry Smith% preconditioning. Done to give an indication of scalability for matrix vector product 4*57ef82e2SBarry Smith% for very sparse matrix and scalability of inner products and vector updates. 5*57ef82e2SBarry Smith% 6*57ef82e2SBarry Smithp = [ 2 4 8 16 32; 7*57ef82e2SBarry Smithm = [ 95.54 51.87 25.74 13.63 6.88; 134.6 67.59 33.93 16.77 9.03]; 8*57ef82e2SBarry Smiths = [455.5 245.2 123.9 72.41 38.63; 432.3 220 111.4 56.24 30.16]; 9*57ef82e2SBarry Smith% 10