On May 7, 2012, at 2:39 PM, Jingcha Joba wrote: > OK.This explains that if a process gets "migrated" from one CPU to another, > the time is not "affected". But it still doesn't explain if the process gets > scheduled back to the same CPU.
MPI_Wtime() doesn't tell you any of this stuff. It just tells you the time *right now*. Basically, MPI_Wtime() can be used to compute wall-clock timings (which are really the only relevant timings when measuring delivered performance, anyway). What happens before or after that is not covered in the scope of MPI_Wtime(). -- Jeff Squyres jsquy...@cisco.com For corporate legal information go to: http://www.cisco.com/web/about/doing_business/legal/cri/
