1 /* 2 * Copyright (c) 2017, 2018, Red Hat, Inc. All rights reserved. 3 * 4 * This code is free software; you can redistribute it and/or modify it 5 * under the terms of the GNU General Public License version 2 only, as 6 * published by the Free Software Foundation. 7 * 8 * This code is distributed in the hope that it will be useful, but WITHOUT 9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 11 * version 2 for more details (a copy is included in the LICENSE file that 12 * accompanied this code). 13 * 14 * You should have received a copy of the GNU General Public License version 15 * 2 along with this work; if not, write to the Free Software Foundation, 16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 17 * 18 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 19 * or visit www.oracle.com if you need additional information or have any 20 * questions. 21 * 22 */ 23 24 #include "precompiled.hpp" 25 26 #include "jfr/jfrEvents.hpp" 27 #include "gc/shared/gcCause.hpp" 28 #include "gc/shared/gcTimer.hpp" 29 #include "gc/shared/gcTrace.hpp" 30 #include "gc/shared/gcWhen.hpp" 31 #include "gc/shenandoah/shenandoahAllocTracker.hpp" 32 #include "gc/shenandoah/shenandoahCollectorPolicy.hpp" 33 #include "gc/shenandoah/shenandoahMarkCompact.hpp" 34 #include "gc/shenandoah/shenandoahHeap.hpp" 35 #include "gc/shenandoah/shenandoahHeuristics.hpp" 36 #include "gc/shenandoah/shenandoahUtils.hpp" 37 38 ShenandoahPhaseTimings::Phase ShenandoahGCPhase::_current_phase = ShenandoahGCPhase::_invalid_phase; 39 40 ShenandoahGCSession::ShenandoahGCSession(GCCause::Cause cause) : 41 _heap(ShenandoahHeap::heap()), 42 _timer(_heap->gc_timer()), 43 _tracer(_heap->tracer()) { 44 assert(!ShenandoahGCPhase::is_valid_phase(ShenandoahGCPhase::current_phase()), 45 "No current GC phase"); 46 47 _timer->register_gc_start(); 48 _tracer->report_gc_start(cause, _timer->gc_start()); 49 _heap->trace_heap(GCWhen::BeforeGC, _tracer); 50 51 _heap->shenandoah_policy()->record_cycle_start(); 52 _heap->heuristics()->record_cycle_start(); 53 _trace_cycle.initialize(_heap->cycle_memory_manager(), _heap->gc_cause(), 54 /* allMemoryPoolsAffected */ true, 55 /* recordGCBeginTime = */ true, 56 /* recordPreGCUsage = */ true, 57 /* recordPeakUsage = */ true, 58 /* recordPostGCUsage = */ true, 59 /* recordAccumulatedGCTime = */ true, 60 /* recordGCEndTime = */ true, 61 /* countCollection = */ true 62 ); 63 } 64 65 ShenandoahGCSession::~ShenandoahGCSession() { 66 _heap->heuristics()->record_cycle_end(); 67 _timer->register_gc_end(); 68 _heap->trace_heap(GCWhen::AfterGC, _tracer); 69 _tracer->report_gc_end(_timer->gc_end(), _timer->time_partitions()); 70 assert(!ShenandoahGCPhase::is_valid_phase(ShenandoahGCPhase::current_phase()), 71 "No current GC phase"); 72 } 73 74 ShenandoahGCPauseMark::ShenandoahGCPauseMark(uint gc_id, SvcGCMarker::reason_type type) : 75 _heap(ShenandoahHeap::heap()), _gc_id_mark(gc_id), _svc_gc_mark(type), _is_gc_active_mark() { 76 77 // FIXME: It seems that JMC throws away level 0 events, which are the Shenandoah 78 // pause events. Create this pseudo level 0 event to push real events to level 1. 79 _heap->gc_timer()->register_gc_phase_start("Shenandoah", Ticks::now()); 80 _trace_pause.initialize(_heap->stw_memory_manager(), _heap->gc_cause(), 81 /* allMemoryPoolsAffected */ true, 82 /* recordGCBeginTime = */ true, 83 /* recordPreGCUsage = */ false, 84 /* recordPeakUsage = */ false, 85 /* recordPostGCUsage = */ false, 86 /* recordAccumulatedGCTime = */ true, 87 /* recordGCEndTime = */ true, 88 /* countCollection = */ true 89 ); 90 91 _heap->heuristics()->record_gc_start(); 92 } 93 94 ShenandoahGCPauseMark::~ShenandoahGCPauseMark() { 95 _heap->gc_timer()->register_gc_phase_end(Ticks::now()); 96 _heap->heuristics()->record_gc_end(); 97 } 98 99 ShenandoahGCPhase::ShenandoahGCPhase(const ShenandoahPhaseTimings::Phase phase) : 100 _heap(ShenandoahHeap::heap()), _phase(phase) { 101 assert(Thread::current()->is_VM_thread() || 102 Thread::current()->is_ConcurrentGC_thread(), 103 "Must be set by these threads"); 104 _parent_phase = _current_phase; 105 _current_phase = phase; 106 107 _heap->phase_timings()->record_phase_start(_phase); 108 } 109 110 ShenandoahGCPhase::~ShenandoahGCPhase() { 111 _heap->phase_timings()->record_phase_end(_phase); 112 _current_phase = _parent_phase; 113 } 114 115 bool ShenandoahGCPhase::is_valid_phase(ShenandoahPhaseTimings::Phase phase) { 116 return phase >= 0 && phase < ShenandoahPhaseTimings::_num_phases; 117 } 118 119 bool ShenandoahGCPhase::is_root_work_phase() { 120 switch(current_phase()) { 121 case ShenandoahPhaseTimings::scan_roots: 122 case ShenandoahPhaseTimings::update_roots: 123 case ShenandoahPhaseTimings::init_evac: 124 case ShenandoahPhaseTimings::final_update_refs_roots: 125 case ShenandoahPhaseTimings::degen_gc_update_roots: 126 case ShenandoahPhaseTimings::init_traversal_gc_work: 127 case ShenandoahPhaseTimings::final_traversal_gc_work: 128 case ShenandoahPhaseTimings::final_traversal_update_roots: 129 case ShenandoahPhaseTimings::full_gc_roots: 130 return true; 131 default: 132 return false; 133 } 134 } 135 136 ShenandoahAllocTrace::ShenandoahAllocTrace(size_t words_size, ShenandoahAllocRequest::Type alloc_type) { 137 if (ShenandoahAllocationTrace) { 138 _start = os::elapsedTime(); 139 _size = words_size; 140 _alloc_type = alloc_type; 141 } else { 142 _start = 0; 143 _size = 0; 144 _alloc_type = ShenandoahAllocRequest::Type(0); 145 } 146 } 147 148 ShenandoahAllocTrace::~ShenandoahAllocTrace() { 149 if (ShenandoahAllocationTrace) { 150 double stop = os::elapsedTime(); 151 double duration_sec = stop - _start; 152 double duration_us = duration_sec * 1000000; 153 ShenandoahAllocTracker* tracker = ShenandoahHeap::heap()->alloc_tracker(); 154 assert(tracker != NULL, "Must be"); 155 tracker->record_alloc_latency(_size, _alloc_type, duration_us); 156 if (duration_us > ShenandoahAllocationStallThreshold) { 157 log_warning(gc)("Allocation stall: %.0f us (threshold: " INTX_FORMAT " us)", 158 duration_us, ShenandoahAllocationStallThreshold); 159 } 160 } 161 } 162 163 ShenandoahWorkerSession::ShenandoahWorkerSession(uint worker_id) : _worker_id(worker_id) { 164 Thread* thr = Thread::current(); 165 assert(ShenandoahThreadLocalData::worker_id(thr) == ShenandoahThreadLocalData::INVALID_WORKER_ID, "Already set"); 166 ShenandoahThreadLocalData::set_worker_id(thr, worker_id); 167 } 168 169 ShenandoahConcurrentWorkerSession::~ShenandoahConcurrentWorkerSession() { 170 _event.commit(GCId::current(), ShenandoahPhaseTimings::phase_name(ShenandoahGCPhase::current_phase())); 171 } 172 173 ShenandoahParallelWorkerSession::~ShenandoahParallelWorkerSession() { 174 _event.commit(GCId::current(), _worker_id, ShenandoahPhaseTimings::phase_name(ShenandoahGCPhase::current_phase())); 175 } 176 ShenandoahWorkerSession::~ShenandoahWorkerSession() { 177 #ifdef ASSERT 178 Thread* thr = Thread::current(); 179 assert(ShenandoahThreadLocalData::worker_id(thr) != ShenandoahThreadLocalData::INVALID_WORKER_ID, "Must be set"); 180 ShenandoahThreadLocalData::set_worker_id(thr, ShenandoahThreadLocalData::INVALID_WORKER_ID); 181 #endif 182 }