1 /* 2 * Copyright (c) 2017, Red Hat, Inc. and/or its affiliates. 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 "gc_implementation/shenandoah/shenandoahAllocTracker.hpp" 27 #include "gc_implementation/shenandoah/shenandoahCollectorPolicy.hpp" 28 #include "gc_implementation/shenandoah/shenandoahMarkCompact.hpp" 29 #include "gc_implementation/shenandoah/shenandoahHeap.hpp" 30 #include "gc_implementation/shenandoah/shenandoahHeuristics.hpp" 31 #include "gc_implementation/shenandoah/shenandoahUtils.hpp" 32 #include "gc_implementation/shenandoah/shenandoahLogging.hpp" 33 #include "gc_interface/gcCause.hpp" 34 #include "gc_implementation/shared/gcTimer.hpp" 35 #include "gc_implementation/shared/gcWhen.hpp" 36 #include "gc_implementation/shared/gcTrace.hpp" 37 38 39 ShenandoahGCSession::ShenandoahGCSession(GCCause::Cause cause) : 40 _timer(ShenandoahHeap::heap()->gc_timer()), 41 _tracer(ShenandoahHeap::heap()->tracer()) { 42 ShenandoahHeap* sh = ShenandoahHeap::heap(); 43 44 _timer->register_gc_start(); 45 _tracer->report_gc_start(cause, _timer->gc_start()); 46 sh->trace_heap(GCWhen::BeforeGC, _tracer); 47 48 sh->shenandoahPolicy()->record_cycle_start(); 49 sh->heuristics()->record_cycle_start(); 50 _trace_cycle.initialize(false, sh->gc_cause(), 51 /* recordGCBeginTime = */ true, 52 /* recordPreGCUsage = */ true, 53 /* recordPeakUsage = */ true, 54 /* recordPostGCUsage = */ true, 55 /* recordAccumulatedGCTime = */ true, 56 /* recordGCEndTime = */ true, 57 /* countCollection = */ true 58 ); 59 } 60 61 ShenandoahGCSession::~ShenandoahGCSession() { 62 ShenandoahHeap::heap()->heuristics()->record_cycle_end(); 63 _tracer->report_gc_end(_timer->gc_end(), _timer->time_partitions()); 64 _timer->register_gc_end(); 65 } 66 67 ShenandoahGCPauseMark::ShenandoahGCPauseMark(SvcGCMarker::reason_type type) : 68 _svc_gc_mark(type), _is_gc_active_mark() { 69 ShenandoahHeap* sh = ShenandoahHeap::heap(); 70 71 // FIXME: It seems that JMC throws away level 0 events, which are the Shenandoah 72 // pause events. Create this pseudo level 0 event to push real events to level 1. 73 sh->gc_timer()->register_gc_phase_start("Shenandoah", Ticks::now()); 74 _trace_pause.initialize(true, sh->gc_cause(), 75 /* recordGCBeginTime = */ true, 76 /* recordPreGCUsage = */ false, 77 /* recordPeakUsage = */ false, 78 /* recordPostGCUsage = */ false, 79 /* recordAccumulatedGCTime = */ true, 80 /* recordGCEndTime = */ true, 81 /* countCollection = */ true 82 ); 83 84 sh->heuristics()->record_gc_start(); 85 } 86 87 ShenandoahGCPauseMark::~ShenandoahGCPauseMark() { 88 ShenandoahHeap* sh = ShenandoahHeap::heap(); 89 sh->gc_timer()->register_gc_phase_end(Ticks::now()); 90 sh->heuristics()->record_gc_end(); 91 } 92 93 ShenandoahGCPhase::ShenandoahGCPhase(const ShenandoahPhaseTimings::Phase phase) : 94 _phase(phase) { 95 ShenandoahHeap::heap()->phase_timings()->record_phase_start(_phase); 96 } 97 98 ShenandoahGCPhase::~ShenandoahGCPhase() { 99 ShenandoahHeap::heap()->phase_timings()->record_phase_end(_phase); 100 } 101 102 ShenandoahAllocTrace::ShenandoahAllocTrace(size_t words_size, ShenandoahHeap::AllocType alloc_type) { 103 if (ShenandoahAllocationTrace) { 104 _start = os::elapsedTime(); 105 _size = words_size; 106 _alloc_type = alloc_type; 107 } else { 108 _start = 0; 109 _size = 0; 110 _alloc_type = ShenandoahHeap::AllocType(0); 111 } 112 } 113 114 ShenandoahAllocTrace::~ShenandoahAllocTrace() { 115 if (ShenandoahAllocationTrace) { 116 double stop = os::elapsedTime(); 117 double duration_sec = stop - _start; 118 double duration_us = duration_sec * 1000000; 119 ShenandoahAllocTracker* tracker = ShenandoahHeap::heap()->alloc_tracker(); 120 assert(tracker != NULL, "Must be"); 121 tracker->record_alloc_latency(_size, _alloc_type, duration_us); 122 if (duration_us > ShenandoahAllocationStallThreshold) { 123 log_warning(gc)("Allocation stall: %.0f us (threshold: " INTX_FORMAT " us)", 124 duration_us, ShenandoahAllocationStallThreshold); 125 } 126 } 127 } 128 129 ShenandoahWorkerSession::ShenandoahWorkerSession(uint worker_id) { 130 Thread* thr = Thread::current(); 131 assert(thr->worker_id() == INVALID_WORKER_ID, "Already set"); 132 thr->set_worker_id(worker_id); 133 } 134 135 ShenandoahWorkerSession::~ShenandoahWorkerSession() { 136 #ifdef ASSERT 137 Thread* thr = Thread::current(); 138 assert(thr->worker_id() != INVALID_WORKER_ID, "Must be set"); 139 thr->set_worker_id(INVALID_WORKER_ID); 140 #endif 141 } 142