Note: This is roughly twice the cost of KSP_GMRES_CGS_REFINE_NEVER because it performs the process twice but it saves the extra norm calculation needed by KSP_GMRES_CGS_REFINE_IFNEEDED.
You should only use this if you absolutely know that the iterative refinement is needed.
Index of all KSP routines
Table of Contents for all manual pages
Index of all manual pages