EPSPRIMMESetBlockSize#

The maximum block size that PRIMME will try to use.

Synopsis#

#include "slepceps.h" 
PetscErrorCode EPSPRIMMESetBlockSize(EPS eps,PetscInt bs)

Logically Collective

Input Parameters#

  • eps - the linear eigensolver context

  • bs - block size

Options Database Key#

  • -eps_primme_blocksize <bs> - sets the maximum allowed block size

Notes#

If the block size is not set, the value established by primme_initialize is used.

The user should set the block size based on the architecture specifics of the target computer, as well as any a priori knowledge of multiplicities. The code does NOT require bs > 1 to find multiple eigenvalues. For some methods, keeping bs = 1 yields the best overall performance.

See the documentation of PRIMME [Stathopoulos and McCombs, 2010] for details.

References#

[Sta10]

A. Stathopoulos and J. R. McCombs. PRIMME: PReconditioned Iterative MultiMethod Eigensolver: methods and software description. ACM Trans. Math. Software, 37(2):21:1–21:30, 2010. doi:10.1145/1731022.1731031.

See Also#

EPS: Eigenvalue Problem Solver, EPSPRIMME, EPSPRIMMEGetBlockSize()

Level#

advanced

Location#

src/eps/impls/external/primme/primme.c

Implementations#

EPSPRIMMESetBlockSize_PRIMME() in src/eps/impls/external/primme/primme.c

Index of all EPS routines Table of Contents for all manual pages Index of all manual pages