Jeff, So in the above stated example, end-start will be: <whatever the solver took> + 20ms ?
(time slice of P2 + P3 = 20ms) On Mon, May 7, 2012 at 1:42 PM, Jeff Squyres (jsquyres) <jsquy...@cisco.com>wrote: > 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/ > > > _______________________________________________ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users >
