保守運用機能のためのクラス (PerfData 管理用のクラス).
ParallelScavenge 用の GCAdaptivePolicyCounters クラス (つまり, AdaptiveSizePolicy に関する PerfData を格納しておくためのクラス (See: GCAdaptivePolicyCounters)).
((cite: hotspot/src/share/vm/gc_implementation/parallelScavenge/psGCAdaptivePolicyCounters.hpp))
// PSGCAdaptivePolicyCounters is a holder class for performance counters
// that track the data and decisions for the ergonomics policy for the
// parallel scavenge collector.
class PSGCAdaptivePolicyCounters : public GCAdaptivePolicyCounters {
ParallelScavengeHeap クラスの _gc_policy_counters フィールドに(のみ)格納されている.
((cite: hotspot/src/share/vm/gc_implementation/parallelScavenge/parallelScavengeHeap.hpp))
class ParallelScavengeHeap : public CollectedHeap {
...
static PSGCAdaptivePolicyCounters* _gc_policy_counters;
GCAdaptivePolicyCounters が格納している情報に加えて, 以下のような情報を格納している.
((cite: hotspot/src/share/vm/gc_implementation/parallelScavenge/psGCAdaptivePolicyCounters.cpp))
PSGCAdaptivePolicyCounters::PSGCAdaptivePolicyCounters(const char* name_arg,
int collectors,
int generations,
PSAdaptiveSizePolicy* size_policy_arg)
: GCAdaptivePolicyCounters(name_arg,
collectors,
generations,
size_policy_arg) {
if (UsePerfData) {
EXCEPTION_MARK;
ResourceMark rm;
const char* cname;
cname = PerfDataManager::counter_name(name_space(), "oldPromoSize");
_old_promo_size = PerfDataManager::create_variable(SUN_GC, cname,
PerfData::U_Bytes, ps_size_policy()->calculated_promo_size_in_bytes(), CHECK);
cname = PerfDataManager::counter_name(name_space(), "oldEdenSize");
_old_eden_size = PerfDataManager::create_variable(SUN_GC, cname,
PerfData::U_Bytes, ps_size_policy()->calculated_eden_size_in_bytes(), CHECK);
cname = PerfDataManager::counter_name(name_space(), "oldCapacity");
_old_capacity = PerfDataManager::create_variable(SUN_GC, cname,
PerfData::U_Bytes, (jlong) InitialHeapSize, CHECK);
cname = PerfDataManager::counter_name(name_space(), "boundaryMoved");
_boundary_moved = PerfDataManager::create_variable(SUN_GC, cname,
PerfData::U_Bytes, (jlong) 0, CHECK);
cname = PerfDataManager::counter_name(name_space(), "avgPromotedAvg");
_avg_promoted_avg_counter =
PerfDataManager::create_variable(SUN_GC, cname, PerfData::U_Bytes,
ps_size_policy()->calculated_promo_size_in_bytes(), CHECK);
cname = PerfDataManager::counter_name(name_space(), "avgPromotedDev");
_avg_promoted_dev_counter =
PerfDataManager::create_variable(SUN_GC, cname, PerfData::U_Bytes,
(jlong) 0 , CHECK);
cname = PerfDataManager::counter_name(name_space(), "avgPromotedPaddedAvg");
_avg_promoted_padded_avg_counter =
PerfDataManager::create_variable(SUN_GC, cname, PerfData::U_Bytes,
ps_size_policy()->calculated_promo_size_in_bytes(), CHECK);
cname = PerfDataManager::counter_name(name_space(),
"avgPretenuredPaddedAvg");
_avg_pretenured_padded_avg =
PerfDataManager::create_variable(SUN_GC, cname, PerfData::U_Bytes,
(jlong) 0, CHECK);
cname = PerfDataManager::counter_name(name_space(),
"changeYoungGenForMajPauses");
_change_young_gen_for_maj_pauses_counter =
PerfDataManager::create_variable(SUN_GC, cname, PerfData::U_Events,
(jlong)0, CHECK);
cname = PerfDataManager::counter_name(name_space(),
"changeOldGenForMinPauses");
_change_old_gen_for_min_pauses =
PerfDataManager::create_variable(SUN_GC, cname, PerfData::U_Events,
(jlong)0, CHECK);
cname = PerfDataManager::counter_name(name_space(), "avgMajorPauseTime");
_avg_major_pause = PerfDataManager::create_variable(SUN_GC, cname,
PerfData::U_Ticks, (jlong) ps_size_policy()->_avg_major_pause->average(), CHECK);
cname = PerfDataManager::counter_name(name_space(), "avgMajorIntervalTime");
_avg_major_interval = PerfDataManager::create_variable(SUN_GC, cname,
PerfData::U_Ticks, (jlong) ps_size_policy()->_avg_major_interval->average(), CHECK);
cname = PerfDataManager::counter_name(name_space(), "majorGcCost");
_major_gc_cost_counter = PerfDataManager::create_variable(SUN_GC, cname,
PerfData::U_Ticks, (jlong) ps_size_policy()->major_gc_cost(), CHECK);
cname = PerfDataManager::counter_name(name_space(), "liveSpace");
_live_space = PerfDataManager::create_variable(SUN_GC, cname,
PerfData::U_Bytes, ps_size_policy()->live_space(), CHECK);
cname = PerfDataManager::counter_name(name_space(), "freeSpace");
_free_space = PerfDataManager::create_variable(SUN_GC, cname,
PerfData::U_Bytes, ps_size_policy()->free_space(), CHECK);
cname = PerfDataManager::counter_name(name_space(), "avgBaseFootprint");
_avg_base_footprint = PerfDataManager::create_variable(SUN_GC, cname,
PerfData::U_Bytes, (jlong) ps_size_policy()->avg_base_footprint()->average(), CHECK);
cname = PerfDataManager::counter_name(name_space(), "gcTimeLimitExceeded");
_gc_overhead_limit_exceeded_counter =
PerfDataManager::create_variable(SUN_GC, cname,
PerfData::U_Events, ps_size_policy()->gc_overhead_limit_exceeded(), CHECK);
cname = PerfDataManager::counter_name(name_space(), "liveAtLastFullGc");
_live_at_last_full_gc_counter =
PerfDataManager::create_variable(SUN_GC, cname,
PerfData::U_Bytes, ps_size_policy()->live_at_last_full_gc(), CHECK);
cname = PerfDataManager::counter_name(name_space(), "majorPauseOldSlope");
_major_pause_old_slope = PerfDataManager::create_variable(SUN_GC, cname,
PerfData::U_None, (jlong) 0, CHECK);
cname = PerfDataManager::counter_name(name_space(), "minorPauseOldSlope");
_minor_pause_old_slope = PerfDataManager::create_variable(SUN_GC, cname,
PerfData::U_None, (jlong) 0, CHECK);
cname = PerfDataManager::counter_name(name_space(), "majorPauseYoungSlope");
_major_pause_young_slope = PerfDataManager::create_variable(SUN_GC, cname,
PerfData::U_None, (jlong) 0, CHECK);
cname = PerfDataManager::counter_name(name_space(), "scavengeSkipped");
_scavenge_skipped = PerfDataManager::create_variable(SUN_GC, cname,
PerfData::U_Bytes, (jlong) 0, CHECK);
cname = PerfDataManager::counter_name(name_space(), "fullFollowsScavenge");
_full_follows_scavenge = PerfDataManager::create_variable(SUN_GC, cname,
PerfData::U_Bytes, (jlong) 0, CHECK);
See: here for details
This document is available under the GNU GENERAL PUBLIC LICENSE Version 2.