NCORE: Difference between revisions
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{{TAG|NCORE}} determines how many cores work on each individual orbital. The current default is {{TAG|NCORE}}=1, meaning that one orbital is treated by one core. {{TAG|NPAR}} is then set to the total number of cores. If {{TAG|NCORE}} equals the total number of cores, {{TAG|NPAR}} is set to 1. This implies distribution over plane wave coefficients only: all cores will work together on every individual band, i.e., the plane wave coefficients of each band are distributed over all cores. This is usually very slow and should be avoided. | |||
== Related Tags and Sections == | == Related Tags and Sections == | ||
Revision as of 20:13, 25 September 2012
NCORE = [integer]
Default: NCORE = 1
Description: NCORE determines the number of compute cores that work on an individual orbital (available as of VASP.5.2.13).
NCORE determines how many cores work on each individual orbital. The current default is NCORE=1, meaning that one orbital is treated by one core. NPAR is then set to the total number of cores. If NCORE equals the total number of cores, NPAR is set to 1. This implies distribution over plane wave coefficients only: all cores will work together on every individual band, i.e., the plane wave coefficients of each band are distributed over all cores. This is usually very slow and should be avoided.