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 #include "precompiled.hpp"
  25 #include "gc/z/zMetronome.hpp"
  26 #include "runtime/mutexLocker.hpp"
  27 #include "runtime/timer.hpp"
  28 #include "utilities/ticks.hpp"
  29 
  30 ZMetronome::ZMetronome(uint64_t hz) :
  31     _monitor(Monitor::leaf, "ZMetronome", false, Monitor::_safepoint_check_never),
  32     _interval_ms(MILLIUNITS / hz),
  33     _start_ms(0),
  34     _nticks(0),
  35     _stopped(false) {}
  36 
  37 bool ZMetronome::wait_for_tick() {
  38   if (_nticks++ == 0) {
  39     // First tick, set start time
  40     const Ticks now = Ticks::now();
  41     _start_ms = TimeHelper::counter_to_millis(now.value());
  42   }
  43 
  44   MonitorLocker ml(&_monitor, Monitor::_no_safepoint_check_flag);
  45 
  46   while (!_stopped) {

   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 #include "precompiled.hpp"
  25 #include "gc/z/zMetronome.hpp"
  26 #include "runtime/mutexLocker.inline.hpp"
  27 #include "runtime/timer.hpp"
  28 #include "utilities/ticks.hpp"
  29 
  30 ZMetronome::ZMetronome(uint64_t hz) :
  31     _monitor(Monitor::leaf, "ZMetronome", false, Monitor::_safepoint_check_never),
  32     _interval_ms(MILLIUNITS / hz),
  33     _start_ms(0),
  34     _nticks(0),
  35     _stopped(false) {}
  36 
  37 bool ZMetronome::wait_for_tick() {
  38   if (_nticks++ == 0) {
  39     // First tick, set start time
  40     const Ticks now = Ticks::now();
  41     _start_ms = TimeHelper::counter_to_millis(now.value());
  42   }
  43 
  44   MonitorLocker ml(&_monitor, Monitor::_no_safepoint_check_flag);
  45 
  46   while (!_stopped) {