Newsgroups: comp.parallel.mpi
From: Nicholas Nevin -SMCC - High Performance Computing <nevin@caja.east.sun.com>
Subject: Re: LAM MPI_WTIME routine
Organization: Sun Microsystems, Inc., Chelmsford, MA.
Date: 12 Jun 1998 09:34:39 -0400
Message-ID: <6v7n2birbf4.fsf@caja.east.sun.com>


     > It always gives a constant time, whenever and wherever (in code) it is 
     > called. I have worked with this routine before and it worked well.

     > Can you tell me some implementation characteristics of MPI_Wtime
     > routine, or ttime routine ? Which unix time routines it calls ?

     > May be this way I can check again the installation of lam or my unix 
     > (AIX rs6k) if there is any problem with the time libraries. 

     > Thanks,
     > Adrianos, University of Cyprus

ttime() uses gettimeofday(). The implementation of ttime() is in 
lib/otb/t/etc/ttime.c

-nick.