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/*
* Copyright (c) 2019, 2021, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*
*/
#include "precompiled.hpp"
#include "gc/g1/g1EvacInfo.hpp"
#include "gc/g1/g1HeapRegionTraceType.hpp"
#include "gc/g1/g1Trace.hpp"
#include "gc/g1/g1GCPauseType.hpp"
#include "gc/shared/gcHeapSummary.hpp"
#include "jfr/jfrEvents.hpp"
#if INCLUDE_JFR
#include "jfr/metadata/jfrSerializer.hpp"
#endif
#if INCLUDE_JFR
class G1HeapRegionTypeConstant : public JfrSerializer {
public:
void serialize(JfrCheckpointWriter& writer) {
static const u4 nof_entries = G1HeapRegionTraceType::G1HeapRegionTypeEndSentinel;
writer.write_count(nof_entries);
for (u4 i = 0; i < nof_entries; ++i) {
writer.write_key(i);
writer.write(G1HeapRegionTraceType::to_string((G1HeapRegionTraceType::Type)i));
}
}
};
class G1YCTypeConstant : public JfrSerializer {
public:
void serialize(JfrCheckpointWriter& writer) {
constexpr EnumRange<G1GCPauseType> types{};
static const u4 nof_entries = static_cast<u4>(types.size());
writer.write_count(nof_entries);
for (auto index : types) {
writer.write_key(static_cast<uint>(index));
writer.write(G1GCPauseTypeHelper::to_string(index));
}
}
};
static void register_jfr_type_constants() {
JfrSerializer::register_serializer(TYPE_G1HEAPREGIONTYPE, true,
new G1HeapRegionTypeConstant());
JfrSerializer::register_serializer(TYPE_G1YCTYPE, true,
new G1YCTypeConstant());
}
#endif
void G1NewTracer::initialize() {
JFR_ONLY(register_jfr_type_constants());
}
void G1NewTracer::report_young_gc_pause(G1GCPauseType pause) {
G1GCPauseTypeHelper::assert_is_young_pause(pause);
_pause = pause;
}
void G1NewTracer::report_gc_end_impl(const Ticks& timestamp, TimePartitions* time_partitions) {
YoungGCTracer::report_gc_end_impl(timestamp, time_partitions);
send_g1_young_gc_event();
}
void G1NewTracer::report_evacuation_info(G1EvacInfo* info) {
send_evacuation_info_event(info);
}
void G1NewTracer::report_evacuation_failed(EvacuationFailedInfo& ef_info) {
send_evacuation_failed_event(ef_info);
ef_info.reset();
}
void G1NewTracer::report_evacuation_statistics(const G1EvacSummary& young_summary, const G1EvacSummary& old_summary) const {
send_young_evacuation_statistics(young_summary);
send_old_evacuation_statistics(old_summary);
}
void G1NewTracer::report_basic_ihop_statistics(size_t threshold,
size_t target_ccupancy,
size_t current_occupancy,
size_t last_allocation_size,
double last_allocation_duration,
double last_marking_length) {
send_basic_ihop_statistics(threshold,
target_ccupancy,
current_occupancy,
last_allocation_size,
last_allocation_duration,
last_marking_length);
}
void G1NewTracer::report_adaptive_ihop_statistics(size_t threshold,
size_t internal_target_occupancy,
size_t current_occupancy,
size_t additional_buffer_size,
double predicted_allocation_rate,
double predicted_marking_length,
bool prediction_active) {
send_adaptive_ihop_statistics(threshold,
internal_target_occupancy,
current_occupancy,
additional_buffer_size,
predicted_allocation_rate,
predicted_marking_length,
prediction_active);
}
void G1NewTracer::send_g1_young_gc_event() {
// Check that the pause type has been updated to something valid for this event.
G1GCPauseTypeHelper::assert_is_young_pause(_pause);
EventG1GarbageCollection e(UNTIMED);
if (e.should_commit()) {
e.set_gcId(GCId::current());
e.set_type(static_cast<uint>(_pause));
e.set_starttime(_shared_gc_info.start_timestamp());
e.set_endtime(_shared_gc_info.end_timestamp());
e.commit();
}
}
void G1NewTracer::send_evacuation_info_event(G1EvacInfo* info) {
EventEvacuationInformation e;
if (e.should_commit()) {
e.set_gcId(GCId::current());
e.set_cSetRegions(info->collectionset_regions());
e.set_cSetUsedBefore(info->collectionset_used_before());
e.set_cSetUsedAfter(info->collectionset_used_after());
e.set_allocationRegions(info->allocation_regions());
e.set_allocationRegionsUsedBefore(info->alloc_regions_used_before());
e.set_allocationRegionsUsedAfter(info->alloc_regions_used_before() + info->bytes_used());
e.set_bytesCopied(info->bytes_used());
e.set_regionsFreed(info->regions_freed());
e.commit();
}
}
void G1NewTracer::send_evacuation_failed_event(const EvacuationFailedInfo& ef_info) const {
EventEvacuationFailed e;
if (e.should_commit()) {
// Create JFR structured failure data
JfrStructCopyFailed evac_failed;
evac_failed.set_objectCount(ef_info.failed_count());
evac_failed.set_firstSize(ef_info.first_size() * HeapWordSize);
evac_failed.set_smallestSize(ef_info.smallest_size() * HeapWordSize);
evac_failed.set_totalSize(ef_info.total_size() * HeapWordSize);
// Add to the event
e.set_gcId(GCId::current());
e.set_evacuationFailed(evac_failed);
e.commit();
}
}
static JfrStructG1EvacuationStatistics
create_g1_evacstats(unsigned gcid, const G1EvacSummary& summary) {
JfrStructG1EvacuationStatistics s;
s.set_gcId(gcid);
s.set_allocated(summary.allocated() * HeapWordSize);
s.set_wasted(summary.wasted() * HeapWordSize);
s.set_used(summary.used() * HeapWordSize);
s.set_undoWaste(summary.undo_wasted() * HeapWordSize);
s.set_regionEndWaste(summary.region_end_waste() * HeapWordSize);
s.set_regionsRefilled(summary.regions_filled());
s.set_directAllocated(summary.direct_allocated() * HeapWordSize);
s.set_failureUsed(summary.failure_used() * HeapWordSize);
s.set_failureWaste(summary.failure_waste() * HeapWordSize);
return s;
}
void G1NewTracer::send_young_evacuation_statistics(const G1EvacSummary& summary) const {
EventG1EvacuationYoungStatistics surv_evt;
if (surv_evt.should_commit()) {
surv_evt.set_statistics(create_g1_evacstats(GCId::current(), summary));
surv_evt.commit();
}
}
void G1NewTracer::send_old_evacuation_statistics(const G1EvacSummary& summary) const {
EventG1EvacuationOldStatistics old_evt;
if (old_evt.should_commit()) {
old_evt.set_statistics(create_g1_evacstats(GCId::current(), summary));
old_evt.commit();
}
}
void G1NewTracer::send_basic_ihop_statistics(size_t threshold,
size_t target_occupancy,
size_t current_occupancy,
size_t last_allocation_size,
double last_allocation_duration,
double last_marking_length) {
EventG1BasicIHOP evt;
if (evt.should_commit()) {
evt.set_gcId(GCId::current());
evt.set_threshold(threshold);
evt.set_targetOccupancy(target_occupancy);
evt.set_thresholdPercentage(target_occupancy > 0 ? ((double)threshold / target_occupancy) : 0.0);
evt.set_currentOccupancy(current_occupancy);
evt.set_recentMutatorAllocationSize(last_allocation_size);
evt.set_recentMutatorDuration(last_allocation_duration * MILLIUNITS);
evt.set_recentAllocationRate(last_allocation_duration != 0.0 ? last_allocation_size / last_allocation_duration : 0.0);
evt.set_lastMarkingDuration(last_marking_length * MILLIUNITS);
evt.commit();
}
}
void G1NewTracer::send_adaptive_ihop_statistics(size_t threshold,
size_t internal_target_occupancy,
size_t current_occupancy,
size_t additional_buffer_size,
double predicted_allocation_rate,
double predicted_marking_length,
bool prediction_active) {
EventG1AdaptiveIHOP evt;
if (evt.should_commit()) {
evt.set_gcId(GCId::current());
evt.set_threshold(threshold);
evt.set_thresholdPercentage(internal_target_occupancy > 0 ? ((double)threshold / internal_target_occupancy) : 0.0);
evt.set_ihopTargetOccupancy(internal_target_occupancy);
evt.set_currentOccupancy(current_occupancy);
evt.set_additionalBufferSize(additional_buffer_size);
evt.set_predictedAllocationRate(predicted_allocation_rate);
evt.set_predictedMarkingDuration(predicted_marking_length * MILLIUNITS);
evt.set_predictionActive(prediction_active);
evt.commit();
}
}
void G1OldTracer::report_gc_start_impl(GCCause::Cause cause, const Ticks& timestamp) {
_shared_gc_info.set_start_timestamp(timestamp);
}
void G1OldTracer::set_gc_cause(GCCause::Cause cause) {
_shared_gc_info.set_cause(cause);
}
void G1MMUTracer::report_mmu(double time_slice_sec, double gc_time_sec, double max_time_sec) {
send_g1_mmu_event(time_slice_sec * MILLIUNITS,
gc_time_sec * MILLIUNITS,
max_time_sec * MILLIUNITS);
}
void G1MMUTracer::send_g1_mmu_event(double time_slice_ms, double gc_time_ms, double max_time_ms) {
EventG1MMU e;
if (e.should_commit()) {
e.set_gcId(GCId::current());
e.set_timeSlice(time_slice_ms);
e.set_gcTime(gc_time_ms);
e.set_pauseTarget(max_time_ms);
e.commit();
}
}
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