| /* |
| * Copyright (c) 2013, 2017, 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/g1CollectedHeap.inline.hpp" |
| #include "gc/g1/g1GCPhaseTimes.hpp" |
| #include "gc/g1/g1HotCardCache.hpp" |
| #include "gc/g1/g1StringDedup.hpp" |
| #include "gc/g1/workerDataArray.inline.hpp" |
| #include "memory/resourceArea.hpp" |
| #include "logging/log.hpp" |
| #include "logging/logStream.hpp" |
| #include "runtime/timer.hpp" |
| #include "runtime/os.hpp" |
| #include "utilities/macros.hpp" |
| |
| static const char* Indents[5] = {"", " ", " ", " ", " "}; |
| |
| G1GCPhaseTimes::G1GCPhaseTimes(uint max_gc_threads) : |
| _max_gc_threads(max_gc_threads), |
| _gc_start_counter(0), |
| _gc_pause_time_ms(0.0) |
| { |
| assert(max_gc_threads > 0, "Must have some GC threads"); |
| |
| _gc_par_phases[GCWorkerStart] = new WorkerDataArray<double>(max_gc_threads, "GC Worker Start (ms):"); |
| _gc_par_phases[ExtRootScan] = new WorkerDataArray<double>(max_gc_threads, "Ext Root Scanning (ms):"); |
| |
| // Root scanning phases |
| _gc_par_phases[ThreadRoots] = new WorkerDataArray<double>(max_gc_threads, "Thread Roots (ms):"); |
| _gc_par_phases[StringTableRoots] = new WorkerDataArray<double>(max_gc_threads, "StringTable Roots (ms):"); |
| _gc_par_phases[UniverseRoots] = new WorkerDataArray<double>(max_gc_threads, "Universe Roots (ms):"); |
| _gc_par_phases[JNIRoots] = new WorkerDataArray<double>(max_gc_threads, "JNI Handles Roots (ms):"); |
| _gc_par_phases[ObjectSynchronizerRoots] = new WorkerDataArray<double>(max_gc_threads, "ObjectSynchronizer Roots (ms):"); |
| _gc_par_phases[FlatProfilerRoots] = new WorkerDataArray<double>(max_gc_threads, "FlatProfiler Roots (ms):"); |
| _gc_par_phases[ManagementRoots] = new WorkerDataArray<double>(max_gc_threads, "Management Roots (ms):"); |
| _gc_par_phases[SystemDictionaryRoots] = new WorkerDataArray<double>(max_gc_threads, "SystemDictionary Roots (ms):"); |
| _gc_par_phases[CLDGRoots] = new WorkerDataArray<double>(max_gc_threads, "CLDG Roots (ms):"); |
| _gc_par_phases[JVMTIRoots] = new WorkerDataArray<double>(max_gc_threads, "JVMTI Roots (ms):"); |
| _gc_par_phases[CMRefRoots] = new WorkerDataArray<double>(max_gc_threads, "CM RefProcessor Roots (ms):"); |
| _gc_par_phases[WaitForStrongCLD] = new WorkerDataArray<double>(max_gc_threads, "Wait For Strong CLD (ms):"); |
| _gc_par_phases[WeakCLDRoots] = new WorkerDataArray<double>(max_gc_threads, "Weak CLD Roots (ms):"); |
| _gc_par_phases[SATBFiltering] = new WorkerDataArray<double>(max_gc_threads, "SATB Filtering (ms):"); |
| |
| _gc_par_phases[UpdateRS] = new WorkerDataArray<double>(max_gc_threads, "Update RS (ms):"); |
| if (G1HotCardCache::default_use_cache()) { |
| _gc_par_phases[ScanHCC] = new WorkerDataArray<double>(max_gc_threads, "Scan HCC (ms):"); |
| } else { |
| _gc_par_phases[ScanHCC] = NULL; |
| } |
| _gc_par_phases[ScanRS] = new WorkerDataArray<double>(max_gc_threads, "Scan RS (ms):"); |
| _gc_par_phases[CodeRoots] = new WorkerDataArray<double>(max_gc_threads, "Code Root Scanning (ms):"); |
| #if INCLUDE_AOT |
| _gc_par_phases[AOTCodeRoots] = new WorkerDataArray<double>(max_gc_threads, "AOT Root Scanning (ms):"); |
| #endif |
| _gc_par_phases[ObjCopy] = new WorkerDataArray<double>(max_gc_threads, "Object Copy (ms):"); |
| _gc_par_phases[Termination] = new WorkerDataArray<double>(max_gc_threads, "Termination (ms):"); |
| _gc_par_phases[GCWorkerTotal] = new WorkerDataArray<double>(max_gc_threads, "GC Worker Total (ms):"); |
| _gc_par_phases[GCWorkerEnd] = new WorkerDataArray<double>(max_gc_threads, "GC Worker End (ms):"); |
| _gc_par_phases[Other] = new WorkerDataArray<double>(max_gc_threads, "GC Worker Other (ms):"); |
| |
| _scan_rs_scanned_cards = new WorkerDataArray<size_t>(max_gc_threads, "Scanned Cards:"); |
| _gc_par_phases[ScanRS]->link_thread_work_items(_scan_rs_scanned_cards, ScannedCards); |
| _scan_rs_claimed_cards = new WorkerDataArray<size_t>(max_gc_threads, "Claimed Cards:"); |
| _gc_par_phases[ScanRS]->link_thread_work_items(_scan_rs_claimed_cards, ClaimedCards); |
| _scan_rs_skipped_cards = new WorkerDataArray<size_t>(max_gc_threads, "Skipped Cards:"); |
| _gc_par_phases[ScanRS]->link_thread_work_items(_scan_rs_skipped_cards, SkippedCards); |
| |
| _update_rs_processed_buffers = new WorkerDataArray<size_t>(max_gc_threads, "Processed Buffers:"); |
| _gc_par_phases[UpdateRS]->link_thread_work_items(_update_rs_processed_buffers); |
| |
| _termination_attempts = new WorkerDataArray<size_t>(max_gc_threads, "Termination Attempts:"); |
| _gc_par_phases[Termination]->link_thread_work_items(_termination_attempts); |
| |
| if (UseStringDeduplication) { |
| _gc_par_phases[StringDedupQueueFixup] = new WorkerDataArray<double>(max_gc_threads, "Queue Fixup (ms):"); |
| _gc_par_phases[StringDedupTableFixup] = new WorkerDataArray<double>(max_gc_threads, "Table Fixup (ms):"); |
| } else { |
| _gc_par_phases[StringDedupQueueFixup] = NULL; |
| _gc_par_phases[StringDedupTableFixup] = NULL; |
| } |
| |
| _gc_par_phases[RedirtyCards] = new WorkerDataArray<double>(max_gc_threads, "Parallel Redirty (ms):"); |
| _redirtied_cards = new WorkerDataArray<size_t>(max_gc_threads, "Redirtied Cards:"); |
| _gc_par_phases[RedirtyCards]->link_thread_work_items(_redirtied_cards); |
| |
| _gc_par_phases[YoungFreeCSet] = new WorkerDataArray<double>(max_gc_threads, "Young Free Collection Set (ms):"); |
| _gc_par_phases[NonYoungFreeCSet] = new WorkerDataArray<double>(max_gc_threads, "Non-Young Free Collection Set (ms):"); |
| |
| _gc_par_phases[PreserveCMReferents] = new WorkerDataArray<double>(max_gc_threads, "Parallel Preserve CM Refs (ms):"); |
| |
| reset(); |
| } |
| |
| void G1GCPhaseTimes::reset() { |
| _cur_collection_par_time_ms = 0.0; |
| _cur_collection_code_root_fixup_time_ms = 0.0; |
| _cur_strong_code_root_purge_time_ms = 0.0; |
| _cur_evac_fail_recalc_used = 0.0; |
| _cur_evac_fail_remove_self_forwards = 0.0; |
| _cur_string_dedup_fixup_time_ms = 0.0; |
| _cur_prepare_tlab_time_ms = 0.0; |
| _cur_resize_tlab_time_ms = 0.0; |
| _cur_derived_pointer_table_update_time_ms = 0.0; |
| _cur_clear_ct_time_ms = 0.0; |
| _cur_expand_heap_time_ms = 0.0; |
| _cur_ref_proc_time_ms = 0.0; |
| _cur_ref_enq_time_ms = 0.0; |
| _cur_collection_start_sec = 0.0; |
| _root_region_scan_wait_time_ms = 0.0; |
| _external_accounted_time_ms = 0.0; |
| _recorded_clear_claimed_marks_time_ms = 0.0; |
| _recorded_young_cset_choice_time_ms = 0.0; |
| _recorded_non_young_cset_choice_time_ms = 0.0; |
| _recorded_redirty_logged_cards_time_ms = 0.0; |
| _recorded_preserve_cm_referents_time_ms = 0.0; |
| _recorded_merge_pss_time_ms = 0.0; |
| _recorded_start_new_cset_time_ms = 0.0; |
| _recorded_total_free_cset_time_ms = 0.0; |
| _recorded_serial_free_cset_time_ms = 0.0; |
| _cur_fast_reclaim_humongous_time_ms = 0.0; |
| _cur_fast_reclaim_humongous_register_time_ms = 0.0; |
| _cur_fast_reclaim_humongous_total = 0; |
| _cur_fast_reclaim_humongous_candidates = 0; |
| _cur_fast_reclaim_humongous_reclaimed = 0; |
| _cur_verify_before_time_ms = 0.0; |
| _cur_verify_after_time_ms = 0.0; |
| |
| for (int i = 0; i < GCParPhasesSentinel; i++) { |
| if (_gc_par_phases[i] != NULL) { |
| _gc_par_phases[i]->reset(); |
| } |
| } |
| } |
| |
| void G1GCPhaseTimes::note_gc_start() { |
| _gc_start_counter = os::elapsed_counter(); |
| reset(); |
| } |
| |
| #define ASSERT_PHASE_UNINITIALIZED(phase) \ |
| assert(_gc_par_phases[phase]->get(i) == uninitialized, "Phase " #phase " reported for thread that was not started"); |
| |
| double G1GCPhaseTimes::worker_time(GCParPhases phase, uint worker) { |
| double value = _gc_par_phases[phase]->get(worker); |
| if (value != WorkerDataArray<double>::uninitialized()) { |
| return value; |
| } |
| return 0.0; |
| } |
| |
| void G1GCPhaseTimes::note_gc_end() { |
| _gc_pause_time_ms = TimeHelper::counter_to_millis(os::elapsed_counter() - _gc_start_counter); |
| |
| double uninitialized = WorkerDataArray<double>::uninitialized(); |
| |
| for (uint i = 0; i < _max_gc_threads; i++) { |
| double worker_start = _gc_par_phases[GCWorkerStart]->get(i); |
| if (worker_start != uninitialized) { |
| assert(_gc_par_phases[GCWorkerEnd]->get(i) != uninitialized, "Worker started but not ended."); |
| double total_worker_time = _gc_par_phases[GCWorkerEnd]->get(i) - _gc_par_phases[GCWorkerStart]->get(i); |
| record_time_secs(GCWorkerTotal, i , total_worker_time); |
| |
| double worker_known_time = |
| worker_time(ExtRootScan, i) |
| + worker_time(SATBFiltering, i) |
| + worker_time(UpdateRS, i) |
| + worker_time(ScanRS, i) |
| + worker_time(CodeRoots, i) |
| + worker_time(ObjCopy, i) |
| + worker_time(Termination, i); |
| |
| record_time_secs(Other, i, total_worker_time - worker_known_time); |
| } else { |
| // Make sure all slots are uninitialized since this thread did not seem to have been started |
| ASSERT_PHASE_UNINITIALIZED(GCWorkerEnd); |
| ASSERT_PHASE_UNINITIALIZED(ExtRootScan); |
| ASSERT_PHASE_UNINITIALIZED(SATBFiltering); |
| ASSERT_PHASE_UNINITIALIZED(UpdateRS); |
| ASSERT_PHASE_UNINITIALIZED(ScanRS); |
| ASSERT_PHASE_UNINITIALIZED(CodeRoots); |
| ASSERT_PHASE_UNINITIALIZED(ObjCopy); |
| ASSERT_PHASE_UNINITIALIZED(Termination); |
| } |
| } |
| } |
| |
| #undef ASSERT_PHASE_UNINITIALIZED |
| |
| // record the time a phase took in seconds |
| void G1GCPhaseTimes::record_time_secs(GCParPhases phase, uint worker_i, double secs) { |
| _gc_par_phases[phase]->set(worker_i, secs); |
| } |
| |
| // add a number of seconds to a phase |
| void G1GCPhaseTimes::add_time_secs(GCParPhases phase, uint worker_i, double secs) { |
| _gc_par_phases[phase]->add(worker_i, secs); |
| } |
| |
| void G1GCPhaseTimes::record_thread_work_item(GCParPhases phase, uint worker_i, size_t count, uint index) { |
| _gc_par_phases[phase]->set_thread_work_item(worker_i, count, index); |
| } |
| |
| // return the average time for a phase in milliseconds |
| double G1GCPhaseTimes::average_time_ms(GCParPhases phase) { |
| return _gc_par_phases[phase]->average() * 1000.0; |
| } |
| |
| size_t G1GCPhaseTimes::sum_thread_work_items(GCParPhases phase, uint index) { |
| assert(_gc_par_phases[phase]->thread_work_items(index) != NULL, "No sub count"); |
| return _gc_par_phases[phase]->thread_work_items(index)->sum(); |
| } |
| |
| template <class T> |
| void G1GCPhaseTimes::details(T* phase, const char* indent) const { |
| LogTarget(Trace, gc, phases, task) lt; |
| if (lt.is_enabled()) { |
| LogStream ls(lt); |
| ls.print("%s", indent); |
| phase->print_details_on(&ls); |
| } |
| } |
| |
| void G1GCPhaseTimes::log_phase(WorkerDataArray<double>* phase, uint indent, outputStream* out, bool print_sum) const { |
| out->print("%s", Indents[indent]); |
| phase->print_summary_on(out, print_sum); |
| details(phase, Indents[indent]); |
| |
| for (uint i = 0; i < phase->MaxThreadWorkItems; i++) { |
| WorkerDataArray<size_t>* work_items = phase->thread_work_items(i); |
| if (work_items != NULL) { |
| out->print("%s", Indents[indent + 1]); |
| work_items->print_summary_on(out, true); |
| details(work_items, Indents[indent + 1]); |
| } |
| } |
| } |
| |
| void G1GCPhaseTimes::debug_phase(WorkerDataArray<double>* phase) const { |
| LogTarget(Debug, gc, phases) lt; |
| if (lt.is_enabled()) { |
| ResourceMark rm; |
| LogStream ls(lt); |
| log_phase(phase, 2, &ls, true); |
| } |
| } |
| |
| void G1GCPhaseTimes::trace_phase(WorkerDataArray<double>* phase, bool print_sum) const { |
| LogTarget(Trace, gc, phases) lt; |
| if (lt.is_enabled()) { |
| LogStream ls(lt); |
| log_phase(phase, 3, &ls, print_sum); |
| } |
| } |
| |
| #define TIME_FORMAT "%.1lfms" |
| |
| void G1GCPhaseTimes::info_time(const char* name, double value) const { |
| log_info(gc, phases)("%s%s: " TIME_FORMAT, Indents[1], name, value); |
| } |
| |
| void G1GCPhaseTimes::debug_time(const char* name, double value) const { |
| log_debug(gc, phases)("%s%s: " TIME_FORMAT, Indents[2], name, value); |
| } |
| |
| void G1GCPhaseTimes::trace_time(const char* name, double value) const { |
| log_trace(gc, phases)("%s%s: " TIME_FORMAT, Indents[3], name, value); |
| } |
| |
| void G1GCPhaseTimes::trace_count(const char* name, size_t value) const { |
| log_trace(gc, phases)("%s%s: " SIZE_FORMAT, Indents[3], name, value); |
| } |
| |
| double G1GCPhaseTimes::print_pre_evacuate_collection_set() const { |
| const double sum_ms = _root_region_scan_wait_time_ms + |
| _recorded_young_cset_choice_time_ms + |
| _recorded_non_young_cset_choice_time_ms + |
| _cur_fast_reclaim_humongous_register_time_ms + |
| _recorded_clear_claimed_marks_time_ms; |
| |
| info_time("Pre Evacuate Collection Set", sum_ms); |
| |
| if (_root_region_scan_wait_time_ms > 0.0) { |
| debug_time("Root Region Scan Waiting", _root_region_scan_wait_time_ms); |
| } |
| debug_time("Prepare TLABs", _cur_prepare_tlab_time_ms); |
| debug_time("Choose Collection Set", (_recorded_young_cset_choice_time_ms + _recorded_non_young_cset_choice_time_ms)); |
| if (G1EagerReclaimHumongousObjects) { |
| debug_time("Humongous Register", _cur_fast_reclaim_humongous_register_time_ms); |
| trace_count("Humongous Total", _cur_fast_reclaim_humongous_total); |
| trace_count("Humongous Candidate", _cur_fast_reclaim_humongous_candidates); |
| } |
| |
| if (_recorded_clear_claimed_marks_time_ms > 0.0) { |
| debug_time("Clear Claimed Marks", _recorded_clear_claimed_marks_time_ms); |
| } |
| return sum_ms; |
| } |
| |
| double G1GCPhaseTimes::print_evacuate_collection_set() const { |
| const double sum_ms = _cur_collection_par_time_ms; |
| |
| info_time("Evacuate Collection Set", sum_ms); |
| |
| trace_phase(_gc_par_phases[GCWorkerStart], false); |
| debug_phase(_gc_par_phases[ExtRootScan]); |
| for (int i = ThreadRoots; i <= SATBFiltering; i++) { |
| trace_phase(_gc_par_phases[i]); |
| } |
| debug_phase(_gc_par_phases[UpdateRS]); |
| if (G1HotCardCache::default_use_cache()) { |
| trace_phase(_gc_par_phases[ScanHCC]); |
| } |
| debug_phase(_gc_par_phases[ScanRS]); |
| debug_phase(_gc_par_phases[CodeRoots]); |
| #if INCLUDE_AOT |
| debug_phase(_gc_par_phases[AOTCodeRoots]); |
| #endif |
| debug_phase(_gc_par_phases[ObjCopy]); |
| debug_phase(_gc_par_phases[Termination]); |
| debug_phase(_gc_par_phases[Other]); |
| debug_phase(_gc_par_phases[GCWorkerTotal]); |
| trace_phase(_gc_par_phases[GCWorkerEnd], false); |
| |
| return sum_ms; |
| } |
| |
| double G1GCPhaseTimes::print_post_evacuate_collection_set() const { |
| const double evac_fail_handling = _cur_evac_fail_recalc_used + |
| _cur_evac_fail_remove_self_forwards; |
| const double sum_ms = evac_fail_handling + |
| _cur_collection_code_root_fixup_time_ms + |
| _recorded_preserve_cm_referents_time_ms + |
| _cur_ref_proc_time_ms + |
| _cur_ref_enq_time_ms + |
| _cur_clear_ct_time_ms + |
| _recorded_merge_pss_time_ms + |
| _cur_strong_code_root_purge_time_ms + |
| _recorded_redirty_logged_cards_time_ms + |
| _recorded_total_free_cset_time_ms + |
| _cur_fast_reclaim_humongous_time_ms + |
| _cur_expand_heap_time_ms + |
| _cur_string_dedup_fixup_time_ms; |
| |
| info_time("Post Evacuate Collection Set", sum_ms); |
| |
| debug_time("Code Roots Fixup", _cur_collection_code_root_fixup_time_ms); |
| |
| debug_time("Preserve CM Refs", _recorded_preserve_cm_referents_time_ms); |
| trace_phase(_gc_par_phases[PreserveCMReferents]); |
| |
| debug_time("Reference Processing", _cur_ref_proc_time_ms); |
| |
| if (G1StringDedup::is_enabled()) { |
| debug_time("String Dedup Fixup", _cur_string_dedup_fixup_time_ms); |
| debug_phase(_gc_par_phases[StringDedupQueueFixup]); |
| debug_phase(_gc_par_phases[StringDedupTableFixup]); |
| } |
| |
| debug_time("Clear Card Table", _cur_clear_ct_time_ms); |
| |
| if (G1CollectedHeap::heap()->evacuation_failed()) { |
| debug_time("Evacuation Failure", evac_fail_handling); |
| trace_time("Recalculate Used", _cur_evac_fail_recalc_used); |
| trace_time("Remove Self Forwards",_cur_evac_fail_remove_self_forwards); |
| } |
| |
| debug_time("Reference Enqueuing", _cur_ref_enq_time_ms); |
| |
| debug_time("Merge Per-Thread State", _recorded_merge_pss_time_ms); |
| debug_time("Code Roots Purge", _cur_strong_code_root_purge_time_ms); |
| |
| debug_time("Redirty Cards", _recorded_redirty_logged_cards_time_ms); |
| trace_phase(_gc_par_phases[RedirtyCards]); |
| #if defined(COMPILER2) || INCLUDE_JVMCI |
| debug_time("DerivedPointerTable Update", _cur_derived_pointer_table_update_time_ms); |
| #endif |
| |
| debug_time("Free Collection Set", _recorded_total_free_cset_time_ms); |
| trace_time("Free Collection Set Serial", _recorded_serial_free_cset_time_ms); |
| trace_phase(_gc_par_phases[YoungFreeCSet]); |
| trace_phase(_gc_par_phases[NonYoungFreeCSet]); |
| |
| if (G1EagerReclaimHumongousObjects) { |
| debug_time("Humongous Reclaim", _cur_fast_reclaim_humongous_time_ms); |
| trace_count("Humongous Reclaimed", _cur_fast_reclaim_humongous_reclaimed); |
| } |
| debug_time("Start New Collection Set", _recorded_start_new_cset_time_ms); |
| if (UseTLAB && ResizeTLAB) { |
| debug_time("Resize TLABs", _cur_resize_tlab_time_ms); |
| } |
| debug_time("Expand Heap After Collection", _cur_expand_heap_time_ms); |
| |
| |
| return sum_ms; |
| } |
| |
| void G1GCPhaseTimes::print_other(double accounted_ms) const { |
| info_time("Other", _gc_pause_time_ms - accounted_ms); |
| } |
| |
| void G1GCPhaseTimes::print() { |
| note_gc_end(); |
| |
| if (_cur_verify_before_time_ms > 0.0) { |
| debug_time("Verify Before", _cur_verify_before_time_ms); |
| } |
| |
| double accounted_ms = 0.0; |
| accounted_ms += print_pre_evacuate_collection_set(); |
| accounted_ms += print_evacuate_collection_set(); |
| accounted_ms += print_post_evacuate_collection_set(); |
| print_other(accounted_ms); |
| |
| if (_cur_verify_after_time_ms > 0.0) { |
| debug_time("Verify After", _cur_verify_after_time_ms); |
| } |
| } |
| |
| G1GCParPhaseTimesTracker::G1GCParPhaseTimesTracker(G1GCPhaseTimes* phase_times, G1GCPhaseTimes::GCParPhases phase, uint worker_id) : |
| _phase_times(phase_times), _phase(phase), _worker_id(worker_id) { |
| if (_phase_times != NULL) { |
| _start_time = os::elapsedTime(); |
| } |
| } |
| |
| G1GCParPhaseTimesTracker::~G1GCParPhaseTimesTracker() { |
| if (_phase_times != NULL) { |
| _phase_times->record_time_secs(_phase, _worker_id, os::elapsedTime() - _start_time); |
| } |
| } |
| |