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 #include "gc/g1/g1Log.hpp" 27 #include "gc/g1/g1StringDedup.hpp" 28 #include "gc/g1/g1StringDedupQueue.hpp" 29 #include "gc/g1/g1StringDedupTable.hpp" 30 #include "gc/g1/g1StringDedupThread.hpp" 31 #include "gc/g1/suspendibleThreadSet.hpp" 32 #include "runtime/atomic.inline.hpp" 33 34 G1StringDedupThread* G1StringDedupThread::_thread = NULL; 35 36 G1StringDedupThread::G1StringDedupThread() : 37 ConcurrentGCThread() { 38 set_name("G1 StrDedup"); 39 create_and_start(); 40 } 41 42 G1StringDedupThread::~G1StringDedupThread() { 43 ShouldNotReachHere(); 44 } 45 46 void G1StringDedupThread::create() { 47 assert(G1StringDedup::is_enabled(), "String deduplication not enabled"); 48 assert(_thread == NULL, "One string deduplication thread allowed"); 49 _thread = new G1StringDedupThread(); 50 } 51 52 G1StringDedupThread* G1StringDedupThread::thread() { 53 assert(G1StringDedup::is_enabled(), "String deduplication not enabled"); 54 assert(_thread != NULL, "String deduplication thread not created"); 55 return _thread; 56 } 57 58 void G1StringDedupThread::run() { 59 G1StringDedupStat total_stat; 60 61 initialize_in_thread(); 62 wait_for_universe_init(); 63 64 // Main loop 65 for (;;) { 66 G1StringDedupStat stat; 67 68 stat.mark_idle(); 69 70 // Wait for the queue to become non-empty 71 G1StringDedupQueue::wait(); 72 if (_should_terminate) { 73 break; 74 } 75 76 { 77 // Include thread in safepoints 78 SuspendibleThreadSetJoiner sts_join; 79 80 stat.mark_exec(); 81 82 // Process the queue | 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 #include "classfile/stringTable.hpp" 27 #include "gc/g1/g1Log.hpp" 28 #include "gc/g1/g1StringDedup.hpp" 29 #include "gc/g1/g1StringDedupQueue.hpp" 30 #include "gc/g1/g1StringDedupTable.hpp" 31 #include "gc/g1/g1StringDedupThread.hpp" 32 #include "gc/g1/suspendibleThreadSet.hpp" 33 #include "oops/oop.inline.hpp" 34 #include "runtime/atomic.inline.hpp" 35 36 G1StringDedupThread* G1StringDedupThread::_thread = NULL; 37 38 G1StringDedupThread::G1StringDedupThread() : 39 ConcurrentGCThread() { 40 set_name("G1 StrDedup"); 41 create_and_start(); 42 } 43 44 G1StringDedupThread::~G1StringDedupThread() { 45 ShouldNotReachHere(); 46 } 47 48 void G1StringDedupThread::create() { 49 assert(G1StringDedup::is_enabled(), "String deduplication not enabled"); 50 assert(_thread == NULL, "One string deduplication thread allowed"); 51 _thread = new G1StringDedupThread(); 52 } 53 54 G1StringDedupThread* G1StringDedupThread::thread() { 55 assert(G1StringDedup::is_enabled(), "String deduplication not enabled"); 56 assert(_thread != NULL, "String deduplication thread not created"); 57 return _thread; 58 } 59 60 class G1StringDedupSharedClosure: public OopClosure { 61 private: 62 G1StringDedupStat& _stat; 63 64 public: 65 G1StringDedupSharedClosure(G1StringDedupStat& stat) : _stat(stat) {} 66 67 virtual void do_oop(oop* p) { ShouldNotReachHere(); } 68 virtual void do_oop(narrowOop* p) { 69 oop java_string = oopDesc::load_decode_heap_oop(p); 70 G1StringDedupTable::deduplicate(java_string, _stat); 71 } 72 }; 73 74 void G1StringDedupThread::deduplicate_shared_strings(G1StringDedupStat& stat) { 75 G1StringDedupSharedClosure sharedStringDedup(stat); 76 StringTable::shared_oops_do(&sharedStringDedup); 77 } 78 79 void G1StringDedupThread::run() { 80 G1StringDedupStat total_stat; 81 82 initialize_in_thread(); 83 wait_for_universe_init(); 84 deduplicate_shared_strings(total_stat); 85 86 // Main loop 87 for (;;) { 88 G1StringDedupStat stat; 89 90 stat.mark_idle(); 91 92 // Wait for the queue to become non-empty 93 G1StringDedupQueue::wait(); 94 if (_should_terminate) { 95 break; 96 } 97 98 { 99 // Include thread in safepoints 100 SuspendibleThreadSetJoiner sts_join; 101 102 stat.mark_exec(); 103 104 // Process the queue |