Changes between Version 167 and Version 168 of doc/app/initialization_parameters

Timestamp:

Nov 23, 2011 10:16:38 AM (13 years ago)

Author:

heinze

Comment:

--

doc/app/initialization_parameters

@@ -531 +531 @@
 Variable to adjust the subdomain sizes in parallel runs.\\\\
 For '''grid_matching''' = '' 'strict' '', the subdomains are forced to have an identical size on all processors. In this case the processor numbers in the respective directions of the virtual processor net must fulfill certain divisor conditions concerning the grid point numbers in the three directions (see [#nx nx], [#ny ny] and [#nz nz]). Advantage of this method is that all PEs bear the same computational load.\\\\
-There is no such restriction by default, because then smaller subdomains are allowed on those processors which form the right and/or north boundary of the virtual processor grid. On all other processors the subdomains are of same size. Whether smaller subdomains are actually used, depends on the number of processors and the grid point numbers used. Information about the respective settings are given in file [../iofiles#RUN_CONTROL RUN_CONTROL].\\\\
+The alternative setting is '''grid_matching''' = '' 'match' '', but then smaller subdomains are allowed on those processors which form the right and/or north boundary of the virtual processor grid. On all other processors the subdomains are of same size. Whether smaller subdomains are actually used, depends on the number of processors and the grid point numbers used. Information about the respective settings are given in file [../iofiles#RUN_CONTROL RUN_CONTROL].\\\\
 When using a multi-grid method for solving the Poisson equation (see [#psolver psolver]) only '''grid_matching''' = '' 'strict' '' is allowed.\\\\
 '''Note:'''\\