8072498: Multi-thread JNI weak reference processing
Summary: Add parallel processing support to WeakProcessor.
Reviewed-by: tschatzl, sjohanss
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#ifndef SHARE_GC_SHARED_WEAKPROCESSORPHASETIMES_HPP
#define SHARE_GC_SHARED_WEAKPROCESSORPHASETIMES_HPP
#include "gc/shared/weakProcessorPhases.hpp"
#include "memory/allocation.hpp"
#include "utilities/globalDefinitions.hpp"
#include "utilities/ticks.hpp"
template<typename T> class WorkerDataArray;
class WeakProcessorPhaseTimes : public CHeapObj<mtGC> {
uint _max_threads;
uint _active_workers;
// Total time for weak processor.
double _total_time_sec;
// Total time for each serially processed phase. Entries for phases
// processed by multiple threads are unused, as are entries for
// unexecuted phases.
double _phase_times_sec[WeakProcessorPhases::phase_count];
// Per-worker times, if multiple threads used and the phase was executed.
WorkerDataArray<double>* _worker_phase_times_sec[WeakProcessorPhases::oop_storage_phase_count];
WorkerDataArray<double>* worker_data(WeakProcessorPhase phase) const;
void log_st_phase(WeakProcessorPhase phase, uint indent) const;
void log_mt_phase_summary(WeakProcessorPhase phase, uint indent) const;
void log_mt_phase_details(WeakProcessorPhase phase, uint indent) const;
public:
WeakProcessorPhaseTimes(uint max_threads);
~WeakProcessorPhaseTimes();
uint max_threads() const;
uint active_workers() const;
void set_active_workers(uint n);
double total_time_sec() const;
double phase_time_sec(WeakProcessorPhase phase) const;
double worker_time_sec(uint worker_id, WeakProcessorPhase phase) const;
void record_total_time_sec(double time_sec);
void record_phase_time_sec(WeakProcessorPhase phase, double time_sec);
void record_worker_time_sec(uint worker_id, WeakProcessorPhase phase, double time_sec);
void reset();
void log_print(uint indent = 0) const;
void log_print_phases(uint indent = 0) const;
};
// Record total weak processor time and worker count in times.
// Does nothing if times is NULL.
class WeakProcessorTimeTracker : StackObj {
WeakProcessorPhaseTimes* _times;
Ticks _start_time;
public:
WeakProcessorTimeTracker(WeakProcessorPhaseTimes* times);
~WeakProcessorTimeTracker();
};
// Record phase time contribution for the current thread in phase times.
// Does nothing if phase times is NULL.
class WeakProcessorPhaseTimeTracker : StackObj {
private:
WeakProcessorPhaseTimes* _times;
WeakProcessorPhase _phase;
uint _worker_id;
Ticks _start_time;
public:
// For tracking serial phase times.
// Precondition: WeakProcessorPhases::is_serial(phase)
WeakProcessorPhaseTimeTracker(WeakProcessorPhaseTimes* times,
WeakProcessorPhase phase);
// For tracking possibly parallel phase times (even if processed by
// only one thread).
// Precondition: WeakProcessorPhases::is_oop_storage(phase)
// Precondition: worker_id < times->max_threads().
WeakProcessorPhaseTimeTracker(WeakProcessorPhaseTimes* times,
WeakProcessorPhase phase,
uint worker_id);
~WeakProcessorPhaseTimeTracker();
};
#endif // SHARE_GC_SHARED_WEAKPROCESSORPHASETIMES_HPP