1 /*
 2  * Copyright (c) 2016, 2021, Red Hat, Inc. All rights reserved.
 3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 4  *
 5  * This code is free software; you can redistribute it and/or modify it
 6  * under the terms of the GNU General Public License version 2 only, as
 7  * published by the Free Software Foundation.
 8  *
 9  * This code is distributed in the hope that it will be useful, but WITHOUT
10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12  * version 2 for more details (a copy is included in the LICENSE file that
13  * accompanied this code).
14  *
15  * You should have received a copy of the GNU General Public License version
16  * 2 along with this work; if not, write to the Free Software Foundation,
17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18  *
19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20  * or visit www.oracle.com if you need additional information or have any
21  * questions.
22  *
23  */
24 
25 #include "precompiled.hpp"
26 
27 #include "gc/shenandoah/shenandoahHeap.inline.hpp"
28 #include "gc/shenandoah/shenandoahTaskqueue.inline.hpp"
29 #include "logging/log.hpp"
30 #include "logging/logStream.hpp"
31 #include "memory/resourceArea.hpp"
32 
33 void ShenandoahObjToScanQueueSet::clear() {
34   uint size = GenericTaskQueueSet<ShenandoahObjToScanQueue, mtGC>::size();
35   for (uint index = 0; index < size; index ++) {
36     ShenandoahObjToScanQueue* q = queue(index);
37     assert(q != nullptr, "Sanity");
38     q->clear();
39   }
40 }
41 
42 bool ShenandoahObjToScanQueueSet::is_empty() {
43   uint size = GenericTaskQueueSet<ShenandoahObjToScanQueue, mtGC>::size();
44   for (uint index = 0; index < size; index ++) {
45     ShenandoahObjToScanQueue* q = queue(index);
46     assert(q != nullptr, "Sanity");
47     if (!q->is_empty()) {
48       return false;
49     }
50   }
51   return true;
52 }
53 
54 #if TASKQUEUE_STATS
55 void ShenandoahObjToScanQueueSet::print_taskqueue_stats_hdr(outputStream* const st) {
56   st->print_raw_cr("GC Task Stats");
57   st->print_raw("thr "); TaskQueueStats::print_header(1, st); st->cr();
58   st->print_raw("--- "); TaskQueueStats::print_header(2, st); st->cr();
59 }
60 
61 void ShenandoahObjToScanQueueSet::print_taskqueue_stats() const {
62   if (!log_develop_is_enabled(Trace, gc, task, stats)) {
63     return;
64   }
65   Log(gc, task, stats) log;
66   ResourceMark rm;
67   LogStream ls(log.trace());
68   outputStream* st = &ls;
69   print_taskqueue_stats_hdr(st);
70 
71   ShenandoahObjToScanQueueSet* queues = const_cast<ShenandoahObjToScanQueueSet*>(this);
72   TaskQueueStats totals;
73   const uint n = size();
74   for (uint i = 0; i < n; ++i) {
75     st->print(UINT32_FORMAT_W(3), i);
76     queues->queue(i)->stats.print(st);
77     st->cr();
78     totals += queues->queue(i)->stats;
79   }
80   st->print("tot "); totals.print(st); st->cr();
81   DEBUG_ONLY(totals.verify());
82 
83 }
84 
85 void ShenandoahObjToScanQueueSet::reset_taskqueue_stats() {
86   const uint n = size();
87   for (uint i = 0; i < n; ++i) {
88     queue(i)->stats.reset();
89   }
90 }
91 #endif // TASKQUEUE_STATS
92 
93 bool ShenandoahTerminatorTerminator::should_exit_termination() {
94   return _heap->cancelled_gc();
95 }