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Parallelize sampling external sources and threadsafe rejection counters (#3830)

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Co-authored-by: Paul Romano <paul.k.romano@gmail.com>
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Ethan Peterson 2026-03-04 15:36:43 -05:00 • committed by GitHub
parent 0ab46dfa35
commit 2bd06660c5
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6 changed files with 114 additions and 37 deletions
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12
include/openmc/source.h
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@ -4,6 +4,7 @@
#ifndef OPENMC_SOURCE_H
#define OPENMC_SOURCE_H
#include <atomic>
#include <limits>
#include <unordered_set>
@ -25,10 +26,18 @@ namespace openmc {
// source_rejection_fraction
constexpr int EXTSRC_REJECT_THRESHOLD {10000};
// Maximum number of source rejections allowed while sampling a single site
constexpr int64_t MAX_SOURCE_REJECTIONS_PER_SAMPLE {1'000'000};
//==============================================================================
// Global variables
//==============================================================================
// Cumulative counters for source rejection diagnostics. These are atomic to
// allow thread-safe concurrent sampling of external sources.
extern std::atomic<int64_t> source_n_accept;
extern std::atomic<int64_t> source_n_reject;
class Source;
namespace model {
@ -265,6 +274,9 @@ SourceSite sample_external_source(uint64_t* seed);
void free_memory_source();
//! Reset cumulative source rejection counters
void reset_source_rejection_counters();
} // namespace openmc
#endif // OPENMC_SOURCE_H