Main Page/faq

This is the resource listing page for NekCEM.

Resource Links

• Public document for parallel I/O of NekCEM

• Document for hybrid programming (proposed work)

Implementation

Topology of I/O code

• I/O functions were initiated from cem_out function of cem_dg.F (and cem_dg2.F).
• Implementation of parallel I/O routine were defined in vtkbin.c and rbIO_nekcem.c
• vtkcommon.c and vtkcommon.h serve as a place to hold common functions as well as global variables.
  

NekCEM notes for myself

• .box → num elements in x,y,z
• .rea → input data
• SIZEu → SIZE parameters:
  • lp = #proc
  • lelx = 20 each dimension
  • lelv = alloc max # of element per proc
• .usr rarr; subuser.F
• cem() in cem_dg.F is the main solver and application entry point

To-do List

• More tests on BG/P for config with ng = M and 1< nf < M
• Tests on Kraken and Jaguar
• Pthread + MPI for I/O
• OpenMP/Pthread + MPI for NekCEM computation
• Parallel I/O for reading .rea file

Some notes

• Fortran generated binary file may not be correctly read in C.
• -lstdc++ for link
• libF77 and libI77
• common.h and common_c.h
• write() in Fortran: 6 refer to screen, * is to screen as well ..