18299973882

Committed 07 Oct 2025 02:14AM UTC coverage: 81.92% (-3.3%) from 85.194%

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62.22

/src/event.cpp

#include "openmc/event.h"

#include "openmc/material.h"
#include "openmc/simulation.h"
#include "openmc/timer.h"

namespace openmc {

//==============================================================================
// Global variables
//==============================================================================

namespace simulation {

SharedArray<EventQueueItem> calculate_fuel_xs_queue;
SharedArray<EventQueueItem> calculate_nonfuel_xs_queue;
SharedArray<EventQueueItem> advance_particle_queue;
SharedArray<EventQueueItem> surface_crossing_queue;
SharedArray<EventQueueItem> collision_queue;

vector<Particle> particles;

} // namespace simulation

//==============================================================================
// Non-member functions
//==============================================================================

void init_event_queues(int64_t n_particles)
{
  simulation::calculate_fuel_xs_queue.reserve(n_particles);
  simulation::calculate_nonfuel_xs_queue.reserve(n_particles);
  simulation::advance_particle_queue.reserve(n_particles);
  simulation::surface_crossing_queue.reserve(n_particles);
  simulation::collision_queue.reserve(n_particles);

  simulation::particles.resize(n_particles);
}

void free_event_queues(void)
{
  simulation::calculate_fuel_xs_queue.clear();
  simulation::calculate_nonfuel_xs_queue.clear();
  simulation::advance_particle_queue.clear();
  simulation::surface_crossing_queue.clear();
  simulation::collision_queue.clear();

  simulation::particles.clear();
}

void dispatch_xs_event(int64_t buffer_idx)
{
  Particle& p = simulation::particles[buffer_idx];
  if (p.material() == MATERIAL_VOID ||
      !model::materials[p.material()]->fissionable()) {
    simulation::calculate_nonfuel_xs_queue.thread_safe_append({p, buffer_idx});
  } else {
    simulation::calculate_fuel_xs_queue.thread_safe_append({p, buffer_idx});
  }
}

void process_init_events(int64_t n_particles, int64_t source_offset)
{
  simulation::time_event_init.start();
#pragma omp parallel for schedule(runtime)
  for (int64_t i = 0; i < n_particles; i++) {
    initialize_history(simulation::particles[i], source_offset + i + 1);
    dispatch_xs_event(i);
  }
  simulation::time_event_init.stop();
}

void process_calculate_xs_events(SharedArray<EventQueueItem>& queue)
{
  simulation::time_event_calculate_xs.start();

  // TODO: If using C++17, we could perform a parallel sort of the queue by
  // particle type, material type, and then energy, in order to improve cache
  // locality and reduce thread divergence on GPU. However, the parallel
  // algorithms typically require linking against an additional library (Intel
  // TBB). Prior to C++17, std::sort is a serial only operation, which in this
  // case makes it too slow to be practical for most test problems.
  //
  // std::sort(std::execution::par_unseq, queue.data(), queue.data() +
  // queue.size());

  int64_t offset = simulation::advance_particle_queue.size();

#pragma omp parallel for schedule(runtime)
  for (int64_t i = 0; i < queue.size(); i++) {
    Particle* p = &simulation::particles[queue[i].idx];
    p->event_calculate_xs();

    // After executing a calculate_xs event, particles will
    // always require an advance event. Therefore, we don't need to use
    // the protected enqueuing function.
    simulation::advance_particle_queue[offset + i] = queue[i];
  }

  simulation::advance_particle_queue.resize(offset + queue.size());

  queue.resize(0);

  simulation::time_event_calculate_xs.stop();
}

void process_advance_particle_events()
{
  simulation::time_event_advance_particle.start();

#pragma omp parallel for schedule(runtime)
  for (int64_t i = 0; i < simulation::advance_particle_queue.size(); i++) {
    int64_t buffer_idx = simulation::advance_particle_queue[i].idx;
    Particle& p = simulation::particles[buffer_idx];
    p.event_advance();
    if (!p.alive())
      continue;
    if (p.collision_distance() > p.boundary().distance()) {
      simulation::surface_crossing_queue.thread_safe_append({p, buffer_idx});
    } else {
      simulation::collision_queue.thread_safe_append({p, buffer_idx});
    }
  }

  simulation::advance_particle_queue.resize(0);

  simulation::time_event_advance_particle.stop();
}

void process_surface_crossing_events()
{
  simulation::time_event_surface_crossing.start();

#pragma omp parallel for schedule(runtime)
  for (int64_t i = 0; i < simulation::surface_crossing_queue.size(); i++) {
    int64_t buffer_idx = simulation::surface_crossing_queue[i].idx;
    Particle& p = simulation::particles[buffer_idx];
    p.event_cross_surface();
    p.event_revive_from_secondary();
    if (p.alive())
      dispatch_xs_event(buffer_idx);
  }

  simulation::surface_crossing_queue.resize(0);

  simulation::time_event_surface_crossing.stop();
}

void process_collision_events()
{
  simulation::time_event_collision.start();

#pragma omp parallel for schedule(runtime)
  for (int64_t i = 0; i < simulation::collision_queue.size(); i++) {
    int64_t buffer_idx = simulation::collision_queue[i].idx;
    Particle& p = simulation::particles[buffer_idx];
    p.event_collide();
    p.event_revive_from_secondary();
    if (p.alive())
      dispatch_xs_event(buffer_idx);
  }

  simulation::collision_queue.resize(0);

  simulation::time_event_collision.stop();
}

void process_death_events(int64_t n_particles)
{
  simulation::time_event_death.start();
#pragma omp parallel for schedule(runtime)
  for (int64_t i = 0; i < n_particles; i++) {
    Particle& p = simulation::particles[i];
    p.event_death();
  }
  simulation::time_event_death.stop();
}

} // namespace openmc

1	#include "openmc/event.h"
2
3	#include "openmc/material.h"
4	#include "openmc/simulation.h"
5	#include "openmc/timer.h"
6
7	namespace openmc {
8
9	//==============================================================================
10	// Global variables
11	//==============================================================================
12
13	namespace simulation {
14
15	SharedArray<EventQueueItem> calculate_fuel_xs_queue;
16	SharedArray<EventQueueItem> calculate_nonfuel_xs_queue;
17	SharedArray<EventQueueItem> advance_particle_queue;
18	SharedArray<EventQueueItem> surface_crossing_queue;
19	SharedArray<EventQueueItem> collision_queue;
20
21	vector<Particle> particles;
22
23	} // namespace simulation
24
25	//==============================================================================
26	// Non-member functions
27	//==============================================================================
28
29	void init_event_queues(int64_t n_particles)	176✔
30	{
31	simulation::calculate_fuel_xs_queue.reserve(n_particles);	176✔
32	simulation::calculate_nonfuel_xs_queue.reserve(n_particles);	176✔
33	simulation::advance_particle_queue.reserve(n_particles);	176✔
34	simulation::surface_crossing_queue.reserve(n_particles);	176✔
35	simulation::collision_queue.reserve(n_particles);	176✔
36
37	simulation::particles.resize(n_particles);	176✔
38	}	176✔
39
40	void free_event_queues(void)	×
41	{
42	simulation::calculate_fuel_xs_queue.clear();	×
43	simulation::calculate_nonfuel_xs_queue.clear();	×
44	simulation::advance_particle_queue.clear();	×
45	simulation::surface_crossing_queue.clear();	×
46	simulation::collision_queue.clear();	×
47
48	simulation::particles.clear();	×
49	}	×
50
51	void dispatch_xs_event(int64_t buffer_idx)	226,738,719✔
52	{
53	Particle& p = simulation::particles[buffer_idx];	226,738,719✔
54	if (p.material() == MATERIAL_VOID \|\|	436,527,263✔
55	!model::materials[p.material()]->fissionable()) {	209,788,544✔
56	simulation::calculate_nonfuel_xs_queue.thread_safe_append({p, buffer_idx});	49,544,855!
57	} else {
58	simulation::calculate_fuel_xs_queue.thread_safe_append({p, buffer_idx});	177,193,864!
59	}
60	}	226,738,719✔
61
62	void process_init_events(int64_t n_particles, int64_t source_offset)	3,101✔
63	{
64	simulation::time_event_init.start();	3,101✔
65	#pragma omp parallel for schedule(runtime)	3,101✔
66	for (int64_t i = 0; i < n_particles; i++) {	×
67	initialize_history(simulation::particles[i], source_offset + i + 1);
68	dispatch_xs_event(i);
69	}
70	simulation::time_event_init.stop();	3,101✔
71	}	3,101✔
72
73	void process_calculate_xs_events(SharedArray<EventQueueItem>& queue)	778,648✔
74	{
75	simulation::time_event_calculate_xs.start();	778,648✔
76
77	// TODO: If using C++17, we could perform a parallel sort of the queue by
78	// particle type, material type, and then energy, in order to improve cache
79	// locality and reduce thread divergence on GPU. However, the parallel
80	// algorithms typically require linking against an additional library (Intel
81	// TBB). Prior to C++17, std::sort is a serial only operation, which in this
82	// case makes it too slow to be practical for most test problems.
83	//
84	// std::sort(std::execution::par_unseq, queue.data(), queue.data() +
85	// queue.size());
86
87	int64_t offset = simulation::advance_particle_queue.size();	778,648✔
88
89	#pragma omp parallel for schedule(runtime)	778,648✔
90	for (int64_t i = 0; i < queue.size(); i++) {	×
91	Particle* p = &simulation::particles[queue[i].idx];
92	p->event_calculate_xs();
93
94	// After executing a calculate_xs event, particles will
95	// always require an advance event. Therefore, we don't need to use
96	// the protected enqueuing function.
97	simulation::advance_particle_queue[offset + i] = queue[i];
98	}
99
100	simulation::advance_particle_queue.resize(offset + queue.size());	778,648✔
101
102	queue.resize(0);	778,648✔
103
104	simulation::time_event_calculate_xs.stop();	778,648✔
105	}	778,648✔
106
107	void process_advance_particle_events()	773,508✔
108	{
109	simulation::time_event_advance_particle.start();	773,508✔
110
111	#pragma omp parallel for schedule(runtime)
112	for (int64_t i = 0; i < simulation::advance_particle_queue.size(); i++) {	×
113	int64_t buffer_idx = simulation::advance_particle_queue[i].idx;
114	Particle& p = simulation::particles[buffer_idx];
115	p.event_advance();
116	if (!p.alive())	×
117	continue;
118	if (p.collision_distance() > p.boundary().distance()) {	×
119	simulation::surface_crossing_queue.thread_safe_append({p, buffer_idx});	×
120	} else {
121	simulation::collision_queue.thread_safe_append({p, buffer_idx});	×
122	}
123	}
124
125	simulation::advance_particle_queue.resize(0);	773,508✔
126
127	simulation::time_event_advance_particle.stop();	773,508✔
128	}	773,508✔
129
130	void process_surface_crossing_events()	256,507✔
131	{
132	simulation::time_event_surface_crossing.start();	256,507✔
133
134	#pragma omp parallel for schedule(runtime)
135	for (int64_t i = 0; i < simulation::surface_crossing_queue.size(); i++) {	×
136	int64_t buffer_idx = simulation::surface_crossing_queue[i].idx;
137	Particle& p = simulation::particles[buffer_idx];
138	p.event_cross_surface();
139	p.event_revive_from_secondary();
140	if (p.alive())	×
141	dispatch_xs_event(buffer_idx);
142	}
143
144	simulation::surface_crossing_queue.resize(0);	256,507✔
145
146	simulation::time_event_surface_crossing.stop();	256,507✔
147	}	256,507✔
148
149	void process_collision_events()	534,984✔
150	{
151	simulation::time_event_collision.start();	534,984✔
152
153	#pragma omp parallel for schedule(runtime)
154	for (int64_t i = 0; i < simulation::collision_queue.size(); i++) {	×
155	int64_t buffer_idx = simulation::collision_queue[i].idx;
156	Particle& p = simulation::particles[buffer_idx];
157	p.event_collide();
158	p.event_revive_from_secondary();
159	if (p.alive())	×
160	dispatch_xs_event(buffer_idx);
161	}
162
163	simulation::collision_queue.resize(0);	534,984✔
164
165	simulation::time_event_collision.stop();	534,984✔
166	}	534,984✔
167
168	void process_death_events(int64_t n_particles)	3,101✔
169	{
170	simulation::time_event_death.start();	3,101✔
171	#pragma omp parallel for schedule(runtime)	3,101✔
172	for (int64_t i = 0; i < n_particles; i++) {	×
173	Particle& p = simulation::particles[i];
174	p.event_death();
175	}
176	simulation::time_event_death.stop();	3,101✔
177	}	3,101✔
178
179	} // namespace openmc

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