git-svn-id: svn://svn.icms.temple.edu/lammps-ro/trunk@26 f3b2605a-c512-4ea7-a41b-209d697bcdaa

src/timer.cpp

@@ -0,0 +1,82 @@
+/* ----------------------------------------------------------------------
+   LAMMPS - Large-scale Atomic/Molecular Massively Parallel Simulator
+   www.cs.sandia.gov/~sjplimp/lammps.html
+   Steve Plimpton, sjplimp@sandia.gov, Sandia National Laboratories
+
+   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"
+
+/* ---------------------------------------------------------------------- */
+
+Timer::Timer()
+{
+  array = (double *) memory->smalloc(TIME_N*sizeof(double),"array");
+}
+
+/* ---------------------------------------------------------------------- */
+
+Timer::~Timer()
+{
+  memory->sfree(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]);
+}