43 lines
1.9 KiB
C
43 lines
1.9 KiB
C
#include <stdio.h>
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#include <atom.h>
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#include <parameter.h>
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#include <stats.h>
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#include <timers.h>
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void initStats(Stats *s) {
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s->total_force_neighs = 0;
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s->total_force_iters = 0;
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s->atoms_within_cutoff = 0;
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s->atoms_outside_cutoff = 0;
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}
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void displayStatistics(Atom *atom, Parameter *param, Stats *stats, double *timer) {
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#ifdef COMPUTE_STATS
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double force_useful_volume = 1e-9 * ( (double)(atom->Nlocal * (param->ntimes + 1)) * (sizeof(MD_FLOAT) * 6 + sizeof(int)) +
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(double)(stats->total_force_neighs) * (sizeof(MD_FLOAT) * 3 + sizeof(int)) );
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double avg_neigh = stats->total_force_neighs / (double)(atom->Nlocal * (param->ntimes + 1));
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double avg_simd = stats->total_force_iters / (double)(atom->Nlocal * (param->ntimes + 1));
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#ifdef EXPLICIT_TYPES
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force_useful_volume += 1e-9 * (double)((atom->Nlocal * (param->ntimes + 1)) + stats->total_force_neighs) * sizeof(int);
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#endif
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printf("Statistics:\n");
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printf("\tVector width: %d, Processor frequency: %.4f GHz\n", VECTOR_WIDTH, param->proc_freq);
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printf("\tAverage neighbors per atom: %.4f\n", avg_neigh);
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printf("\tAverage SIMD iterations per atom: %.4f\n", avg_simd);
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printf("\tTotal number of computed pair interactions: %lld\n", stats->total_force_neighs);
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printf("\tTotal number of SIMD iterations: %lld\n", stats->total_force_iters);
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printf("\tUseful read data volume for force computation: %.2fGB\n", force_useful_volume);
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printf("\tCycles/SIMD iteration: %.4f\n", timer[FORCE] * param->proc_freq * 1e9 / stats->total_force_iters);
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#ifdef USE_REFERENCE_VERSION
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const double eff_pct = (double)stats->atoms_within_cutoff / (double)(stats->atoms_within_cutoff + stats->atoms_outside_cutoff) * 100.0;
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printf("\tAtoms within/outside cutoff radius: %lld/%lld (%.2f%%)\n", stats->atoms_within_cutoff, stats->atoms_outside_cutoff, eff_pct);
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#endif
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#endif
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}
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