61 lines
1.6 KiB
C++
61 lines
1.6 KiB
C++
// Timing test example code
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//
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// Author : Chris H. Rycroft (LBL / UC Berkeley)
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// Email : chr@alum.mit.edu
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// Date : August 30th 2011
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#include <ctime>
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using namespace std;
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#include "voro++.hh"
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using namespace voro;
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// Set up constants for the container geometry
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const double x_min=-1,x_max=1;
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const double y_min=-1,y_max=1;
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const double z_min=-1,z_max=1;
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// Set up the number of blocks that the container is divided into. If the
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// preprocessor variable NNN hasn't been passed to the code, then initialize it
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// to a good value. Otherwise, use the value that has been passed.
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#ifndef NNN
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#define NNN 26
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#endif
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const int n_x=NNN,n_y=NNN,n_z=NNN;
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// Set the number of particles that are going to be randomly introduced
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const int particles=100000;
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// This function returns a random double between 0 and 1
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double rnd() {return double(rand())/RAND_MAX;}
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int main() {
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clock_t start,end;
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int i;double x,y,z;
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// Create a container with the geometry given above, and make it
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// periodic in each of the three coordinates. Allocate space for eight
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// particles within each computational block.
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container con(x_min,x_max,y_min,y_max,z_min,z_max,n_x,n_y,n_z,
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true,true,true,8);
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//Randomly add particles into the container
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for(i=0;i<particles;i++) {
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x=x_min+rnd()*(x_max-x_min);
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y=y_min+rnd()*(y_max-y_min);
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z=z_min+rnd()*(z_max-z_min);
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con.put(i,x,y,z);
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}
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// Store the initial clock time
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start=clock();
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// Carry out a dummy computation of all cells in the entire container
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con.compute_all_cells();
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// Calculate the elapsed time and print it
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end=clock();
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double runtime=double(end-start)/CLOCKS_PER_SEC;
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printf("%g\n",runtime);
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}
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