= Name and subject of the action Last edition: '''[[Wikinfo(changed_ts)]]''' by '''[[Wikinfo(changed_by)]]''' The PI is responsible to closely follow the progress of the action, and especially to contact NEMO project manager if the delay on preview (or review) are longer than the 2 weeks expected. [[PageOutline(2, , inline)]] == Summary ||=Action || MPI3 collective neighbours communications instead of point to point communications || ||=PI(S) || Silvia Mocavero and Italo Epicoco || ||=Digest || MPI-3 provides new neighbourhood collective operations that allow to perform halo exchange with a single MPI communication call. || ||=Dependencies || If any || ||=Branch || source:/NEMO/branches/{YEAR}/dev_r{REV}_{ACTION_NAME} || ||=Previewer(s) || Mirek Andrejczuk || ||=Reviewer(s) || Mirek Andrejczuk || ||=Ticket || #XXXX || === Description {{{#!box width=25em help Continuation of HPC-12_Mocavero_mpi3: integration of graph topology to support the routines that use a 9-point stencil, the land domain exclusion and the north fold exchanges through MPI3 neighbourhood collective communications \\ }}} ''...'' === Implementation {{{#!box width=35em help Describe flow chart of the changes in the code. \\ List the Fortran modules and subroutines to be created/edited/deleted. \\ Detailed list of new variables to be defined (including namelists), \\ give for each the chosen name and description wrt coding rules. }}} ''...'' === Documentation updates {{{#!box width=55em help Using previous parts, define the main changes to be done in the NEMO literature (manuals, guide, web pages, …). }}} ''...'' == Preview {{{#!box width=50em info [[Include(wiki:Developers/DevProcess#preview_)]] }}} ''...'' == Tests {{{#!box width=50em info [[Include(wiki:Developers/DevProcess#tests)]] }}} ''...'' == Review {{{#!box width=50em info [[Include(wiki:Developers/DevProcess#review)]] }}} ''...''