// // This class exposes implementation details of the various // collector(s), and we need to be very careful with it. If // use of this class grows, we should split it into public // and implementation-private "causes". // // The definitions in the SA code should be kept in sync // with the definitions here. //
class GCCause : public AllStatic { public: enum Cause { /* public */
_java_lang_system_gc,
_full_gc_alot,
_scavenge_alot,
_allocation_profiler,
_jvmti_force_gc,
_gc_locker,
_heap_inspection,
_heap_dump,
_wb_young_gc,
_wb_conc_mark,
_wb_full_gc,
_wb_breakpoint,
_archive_time_gc,
/* implementation independent, but reserved for GC use */
_no_gc,
_no_cause_specified,
_allocation_failure,
inlinestaticbool is_serviceability_requested_gc(GCCause::Cause
cause) { return (cause == GCCause::_jvmti_force_gc ||
cause == GCCause::_heap_inspection ||
cause == GCCause::_heap_dump);
}
// Causes for collection of the tenured gernation inlinestaticbool is_tenured_allocation_failure_gc(GCCause::Cause cause) { // _adaptive_size_policy for a full collection after a young GC // _allocation_failure is the generic cause a collection which could result // in the collection of the tenured generation if there is not enough space // in the tenured generation to support a young GC. return (cause == GCCause::_adaptive_size_policy ||
cause == GCCause::_allocation_failure);
}
// Causes for collection of the young generation inlinestaticbool is_allocation_failure_gc(GCCause::Cause cause) { // _allocation_failure is the generic cause a collection for allocation failure // _adaptive_size_policy is for a collection done before a full GC return (cause == GCCause::_allocation_failure ||
cause == GCCause::_adaptive_size_policy ||
cause == GCCause::_shenandoah_allocation_failure_evac);
}
// Return a string describing the GCCause. staticconstchar* to_string(GCCause::Cause cause);
};
Die Informationen auf dieser Webseite wurden
nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit,
noch Qualität der bereit gestellten Informationen zugesichert.
Bemerkung:
Die farbliche Syntaxdarstellung und die Messung sind noch experimentell.