Requests for technical support from the VASP group should be posted in the VASP-forum.

Difference between revisions of "LSCAAWARE"

From Vaspwiki
Jump to navigation Jump to search
 
(2 intermediate revisions by the same user not shown)
Line 1: Line 1:
{{TAGDEF|LSCAAWAVE|[logical]}}
+
{{TAGDEF|LSCAAWARE|[logical]}}
 
{{DEF|LSCAAWARE|.TRUE.|if VASP is compiled with scaLAPACK support (precompiler flag -DscaLAPACK)|.FALSE.|otherwise}}
 
{{DEF|LSCAAWARE|.TRUE.|if VASP is compiled with scaLAPACK support (precompiler flag -DscaLAPACK)|.FALSE.|otherwise}}
  
Description: {{TAG|LSCAAWARE}} decides wether to distribute the Hamilton matrix or not.  
+
Description: {{TAG|LSCAAWARE}} controls the distribution of the Hamilton matrix.  
  
 
----
 
----
  
For {{TAG|LSCAAWARE}}=.TRUE., VASP distributes the Hamilton matrix and uses scaLAPACK routines to diagonalize subspaces.
+
For {{TAG|LSCAAWARE}}=.TRUE., VASP distributes the Hamilton matrix among the MPI ranks. 
 +
For {{TAG|LSCAAWARE}}=.FALSE., each MPI ranks allocates the complete Hamiltonain. In both cases {{TAG|LSCALAPACK}} decides if ScaLAPACK routines are used for diagonalization.  
  
 
== Related Tags and Sections ==
 
== Related Tags and Sections ==

Latest revision as of 17:03, 26 August 2019

LSCAAWARE = [logical] 

Default: LSCAAWARE = .TRUE. if VASP is compiled with scaLAPACK support (precompiler flag -DscaLAPACK)
= .FALSE. otherwise

Description: LSCAAWARE controls the distribution of the Hamilton matrix.


For LSCAAWARE=.TRUE., VASP distributes the Hamilton matrix among the MPI ranks. For LSCAAWARE=.FALSE., each MPI ranks allocates the complete Hamiltonain. In both cases LSCALAPACK decides if ScaLAPACK routines are used for diagonalization.

Related Tags and Sections

NPAR, NCORE, LPLANE, NSIM, KPAR, LSCALU, LSCALAPACK

Examples that use this tag