From: chetan@cdac.ernet.in
Newsgroups: comp.parallel.mpi
Subject: Timing calls
Date: Fri, 09 Oct 1998 04:49:10 GMT
Organization: Deja News - The Leader in Internet Discussion
Message-Id: <6vk4k6$hs$1@nnrp1.dejanews.com>


Hi all,
In one of my programs (FORTRAN) I have noticed that the time
reported by MPI_WTIME does not match with the time reported
by other calls like dtime (I am using Solaris 2.6 on a SPARC).
The ratio of the two time values is too big to be taken lightly
(like 4 times in one case). MPI_WTIME reports larger time value.

The structure of the prog is
##########################################
All the usual MPI stuff here
MPI_BARRIER
MPI_WTIME
---------------------- I have inserted dtime here
..
.. Some calculations
..
MPI_BARRIER
MPI_WTIME
----------------------- dtime

some more calculations
MPI_FINALIZE
STOP
END
################################################
I have tried changing the order in which the two timing
calls appear. But, no change.
Please help
TIA

Chetan

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