slepc-3.21.1 2024-04-26
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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 eigenproblem solver context
bs  - block size

Options Database Key

-eps_primme_blocksize  - Sets the max allowed block size value

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 Also

EPSPRIMMEGetBlockSize()

Level

advanced

Location

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

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