MD-Bench/gromacs/stats.c

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#include <stdio.h>
#include <atom.h>
#include <parameter.h>
#include <stats.h>
#include <timers.h>
void initStats(Stats *s) {
s->calculated_forces = 0;
s->num_neighs = 0;
s->force_iters = 0;
s->atoms_within_cutoff = 0;
s->atoms_outside_cutoff = 0;
s->clusters_within_cutoff = 0;
s->clusters_outside_cutoff = 0;
}
void displayStatistics(Atom *atom, Parameter *param, Stats *stats, double *timer) {
#ifdef COMPUTE_STATS
const int MxN = CLUSTER_DIM_M * CLUSTER_DIM_N;
double avg_atoms_cluster = (double)(atom->Nlocal) / (double)(atom->Nclusters_local);
double force_useful_volume = 1e-9 * ( (double)(atom->Nlocal * (param->ntimes + 1)) * (sizeof(MD_FLOAT) * 6 + sizeof(int)) +
(double)(stats->num_neighs) * (sizeof(MD_FLOAT) * 3 + sizeof(int)) );
double avg_neigh_atom = (stats->num_neighs * CLUSTER_DIM_N) / (double)(atom->Nlocal * (param->ntimes + 1));
double avg_neigh_cluster = (double)(stats->num_neighs) / (double)(stats->calculated_forces);
double avg_simd = stats->force_iters / (double)(atom->Nlocal * (param->ntimes + 1));
#ifdef EXPLICIT_TYPES
force_useful_volume += 1e-9 * (double)((atom->Nlocal * (param->ntimes + 1)) + stats->num_neighs) * sizeof(int);
#endif
printf("Statistics:\n");
printf("\tVector width: %d, Processor frequency: %.4f GHz\n", VECTOR_WIDTH, param->proc_freq);
printf("\tAverage atoms per cluster: %.4f\n", avg_atoms_cluster);
printf("\tAverage neighbors per atom: %.4f\n", avg_neigh_atom);
printf("\tAverage neighbors per cluster: %.4f\n", avg_neigh_cluster);
printf("\tAverage SIMD iterations per atom: %.4f\n", avg_simd);
printf("\tTotal number of computed pair interactions: %lld\n", stats->num_neighs * MxN);
printf("\tTotal number of SIMD iterations: %lld\n", stats->force_iters);
printf("\tUseful read data volume for force computation: %.2fGB\n", force_useful_volume);
printf("\tCycles/SIMD iteration: %.4f\n", timer[FORCE] * param->proc_freq * 1e9 / stats->force_iters);
#ifdef USE_REFERENCE_VERSION
const double atoms_eff = (double)stats->atoms_within_cutoff / (double)(stats->atoms_within_cutoff + stats->atoms_outside_cutoff) * 100.0;
printf("\tAtoms within/outside cutoff radius: %lld/%lld (%.2f%%)\n", stats->atoms_within_cutoff, stats->atoms_outside_cutoff, atoms_eff);
const double clusters_eff = (double)stats->clusters_within_cutoff / (double)(stats->clusters_within_cutoff + stats->clusters_outside_cutoff) * 100.0;
printf("\tClusters within/outside cutoff radius: %lld/%lld (%.2f%%)\n", stats->clusters_within_cutoff, stats->clusters_outside_cutoff, clusters_eff);
#endif
#endif
}