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timer.cpp
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Mon, Nov 4, 14:49

timer.cpp
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/* ----------------------------------------------------------------------
LAMMPS - Large-scale Atomic/Molecular Massively Parallel Simulator
http://lammps.sandia.gov, Sandia National Laboratories
Steve Plimpton, sjplimp@sandia.gov
Copyright (2003) Sandia Corporation. Under the terms of Contract
DE-AC04-94AL85000 with Sandia Corporation, the U.S. Government retains
certain rights in this software. This software is distributed under
the GNU General Public License.
See the README file in the top-level LAMMPS directory.
------------------------------------------------------------------------- */
#include "mpi.h"
#include "timer.h"
#include "memory.h"
using namespace LAMMPS_NS;
/* ---------------------------------------------------------------------- */
Timer::Timer(LAMMPS *lmp) : Pointers(lmp)
{
memory->create(array,TIME_N,"array");
}
/* ---------------------------------------------------------------------- */
Timer::~Timer()
{
memory->destroy(array);
}
/* ---------------------------------------------------------------------- */
void Timer::init()
{
for (int i = 0; i < TIME_N; i++) array[i] = 0.0;
}
/* ---------------------------------------------------------------------- */
void Timer::stamp()
{
// uncomment if want synchronized timing
// MPI_Barrier(world);
previous_time = MPI_Wtime();
}
/* ---------------------------------------------------------------------- */
void Timer::stamp(int which)
{
// uncomment if want synchronized timing
// MPI_Barrier(world);
double current_time = MPI_Wtime();
array[which] += current_time - previous_time;
previous_time = current_time;
}
/* ---------------------------------------------------------------------- */
void Timer::barrier_start(int which)
{
MPI_Barrier(world);
array[which] = MPI_Wtime();
}
/* ---------------------------------------------------------------------- */
void Timer::barrier_stop(int which)
{
MPI_Barrier(world);
double current_time = MPI_Wtime();
array[which] = current_time - array[which];
}
/* ---------------------------------------------------------------------- */
double Timer::elapsed(int which)
{
double current_time = MPI_Wtime();
return (current_time - array[which]);
}

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