1 /*

     2  * Copyright (c) 2016, 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 "gc/shenandoah/shenandoahHeap.hpp"

    27 #include "gc/shenandoah/shenandoahTaskqueue.hpp"

    28 #include "logging/log.hpp"

    29 #include "logging/logStream.hpp"

    30 

    31 void ShenandoahObjToScanQueueSet::clear() {

    32   uint size = GenericTaskQueueSet<ShenandoahObjToScanQueue, mtGC>::size();

    33   for (uint index = 0; index < size; index ++) {

    34     ShenandoahObjToScanQueue* q = queue(index);

    35     assert(q != NULL, "Sanity");

    36     q->clear();

    37   }

    38 }

    39 

    40 bool ShenandoahObjToScanQueueSet::is_empty() {

    41   uint size = GenericTaskQueueSet<ShenandoahObjToScanQueue, mtGC>::size();

    42   for (uint index = 0; index < size; index ++) {

    43     ShenandoahObjToScanQueue* q = queue(index);

    44     assert(q != NULL, "Sanity");

    45     if (!q->is_empty()) {

    46       return false;

    47     }

    48   }

    49   return true;

    50 }

    51 

    52 class ShenandoahOWSTTerminator: public OWSTTaskTerminator {

    53 public:

    54   ShenandoahOWSTTerminator(uint n_threads, TaskQueueSetSuper* queue_set) :

    55     OWSTTaskTerminator(n_threads, queue_set){ }

    56 

    57 protected:

    58   bool exit_termination(size_t tasks, TerminatorTerminator* terminator);

    59 };

    60 

    61 bool ShenandoahOWSTTerminator::exit_termination(size_t tasks, TerminatorTerminator* terminator) {

    62   ShenandoahTerminatorTerminator* t = (ShenandoahTerminatorTerminator*)terminator;

    63   bool force = (t != NULL) && t->should_force_termination();

    64   if (force) {

    65     // Force termination : continue termination, even there are remaining tasks.

    66     return false;

    67   } else {

    68     return OWSTTaskTerminator::exit_termination(tasks, terminator);

    69   }

    70 }

    71 

    72 ShenandoahTaskTerminator::ShenandoahTaskTerminator(uint n_threads, TaskQueueSetSuper* queue_set) :

    73   _terminator(new ShenandoahOWSTTerminator(n_threads, queue_set)) { }

    74 

    75 ShenandoahTaskTerminator::~ShenandoahTaskTerminator() {

    76   assert(_terminator != NULL, "Invariant");

    77   delete _terminator;

    78 }

    79 

    80 #if TASKQUEUE_STATS

    81 void ShenandoahObjToScanQueueSet::print_taskqueue_stats_hdr(outputStream* const st) {

    82   st->print_raw_cr("GC Task Stats");

    83   st->print_raw("thr "); TaskQueueStats::print_header(1, st); st->cr();

    84   st->print_raw("--- "); TaskQueueStats::print_header(2, st); st->cr();

    85 }

    86 

    87 void ShenandoahObjToScanQueueSet::print_taskqueue_stats() const {

    88   if (!log_develop_is_enabled(Trace, gc, task, stats)) {

    89     return;

    90   }

    91   Log(gc, task, stats) log;

    92   ResourceMark rm;

    93   LogStream ls(log.trace());

    94   outputStream* st = &ls;

    95   print_taskqueue_stats_hdr(st);

    96 

    97   ShenandoahObjToScanQueueSet* queues = const_cast<ShenandoahObjToScanQueueSet*>(this);

    98   TaskQueueStats totals;

    99   const uint n = size();

   100   for (uint i = 0; i < n; ++i) {

   101     st->print(UINT32_FORMAT_W(3), i);

   102     queues->queue(i)->stats.print(st);

   103     st->cr();

   104     totals += queues->queue(i)->stats;

   105   }

   106   st->print("tot "); totals.print(st); st->cr();

   107   DEBUG_ONLY(totals.verify());

   108 

   109 }

   110 

   111 void ShenandoahObjToScanQueueSet::reset_taskqueue_stats() {

   112   const uint n = size();

   113   for (uint i = 0; i < n; ++i) {

   114     queue(i)->stats.reset();

   115   }

   116 }

   117 #endif // TASKQUEUE_STATS