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/shenandoahUtils.hpp"
  31 #include "gc_implementation/shenandoah/shenandoahLogging.hpp"
  32 #include "gc_implementation/shared/gcTimer.hpp"
  33 
  34 
  35 ShenandoahGCSession::ShenandoahGCSession() {
  36   ShenandoahHeap* sh = ShenandoahHeap::heap();
  37   _timer = sh->gc_timer();
  38   _timer->register_gc_start();
  39   sh->shenandoahPolicy()->record_cycle_start();
  40   _trace_cycle.initialize(false, sh->gc_cause(),
  41           /* recordGCBeginTime = */       true,
  42           /* recordPreGCUsage = */        true,
  43           /* recordPeakUsage = */         true,
  44           /* recordPostGCUsage = */       true,
  45           /* recordAccumulatedGCTime = */ true,
  46           /* recordGCEndTime = */         true,
  47           /* countCollection = */         true
  48   );
  49 }
  50 
  51 ShenandoahGCSession::~ShenandoahGCSession() {
  52   ShenandoahHeap::heap()->shenandoahPolicy()->record_cycle_end();
  53   _timer->register_gc_end();
  54 }
  55 
  56 ShenandoahGCPauseMark::ShenandoahGCPauseMark(SvcGCMarker::reason_type type) :
  57         _svc_gc_mark(type), _is_gc_active_mark() {
  58   ShenandoahHeap* sh = ShenandoahHeap::heap();
  59   sh->shenandoahPolicy()->record_gc_start();
  60 
  61   _trace_pause.initialize(true, sh->gc_cause(),
  62           /* recordGCBeginTime = */       true,
  63           /* recordPreGCUsage = */        false,
  64           /* recordPeakUsage = */         false,
  65           /* recordPostGCUsage = */       false,
  66           /* recordAccumulatedGCTime = */ true,
  67           /* recordGCEndTime = */         true,
  68           /* countCollection = */         true
  69   );
  70 }
  71 
  72 ShenandoahGCPauseMark::~ShenandoahGCPauseMark() {
  73   ShenandoahHeap* sh = ShenandoahHeap::heap();
  74   sh->shenandoahPolicy()->record_gc_end();
  75 }
  76 
  77 ShenandoahGCPhase::ShenandoahGCPhase(const ShenandoahPhaseTimings::Phase phase) :
  78   _phase(phase) {
  79   ShenandoahHeap::heap()->phase_timings()->record_phase_start(_phase);
  80 }
  81 
  82 ShenandoahGCPhase::~ShenandoahGCPhase() {
  83   ShenandoahHeap::heap()->phase_timings()->record_phase_end(_phase);
  84 }
  85 
  86 ShenandoahAllocTrace::ShenandoahAllocTrace(size_t words_size, ShenandoahHeap::AllocType alloc_type) {
  87   if (ShenandoahAllocationTrace) {
  88     _start = os::elapsedTime();
  89     _size = words_size;
  90     _alloc_type = alloc_type;
  91   } else {
  92     _start = 0;
  93     _size = 0;
  94     _alloc_type = ShenandoahHeap::AllocType(0);
  95   }
  96 }
  97 
  98 ShenandoahAllocTrace::~ShenandoahAllocTrace() {
  99   if (ShenandoahAllocationTrace) {
 100     double stop = os::elapsedTime();
 101     double duration_sec = stop - _start;
 102     double duration_us = duration_sec * 1000000;
 103     ShenandoahAllocTracker* tracker = ShenandoahHeap::heap()->alloc_tracker();
 104     assert(tracker != NULL, "Must be");
 105     tracker->record_alloc_latency(_size, _alloc_type, duration_us);
 106     if (duration_us > ShenandoahAllocationStallThreshold) {
 107       log_warning(gc)("Allocation stall: %.0f us (threshold: " INTX_FORMAT " us)",
 108                       duration_us, ShenandoahAllocationStallThreshold);
 109     }
 110   }
 111 }