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_implementation/shared/gcTimer.hpp"
  27 #include "gc_implementation/shared/gcTraceTime.hpp"
  28 #include "runtime/globals.hpp"
  29 #include "runtime/os.hpp"
  30 #include "runtime/safepoint.hpp"
  31 #include "runtime/thread.inline.hpp"
  32 #include "runtime/timer.hpp"
  33 #include "utilities/ostream.hpp"

  34 
  35 
  36 GCTraceTime::GCTraceTime(const char* title, bool doit, bool print_cr, GCTimer* timer) :
  37     _title(title), _doit(doit), _print_cr(print_cr), _timer(timer) {
  38   if (_doit || _timer != NULL) {
  39     _start_counter = os::elapsed_counter();
  40   }
  41 
  42   if (_timer != NULL) {
  43     assert(SafepointSynchronize::is_at_safepoint(), "Tracing currently only supported at safepoints");
  44     assert(Thread::current()->is_VM_thread(), "Tracing currently only supported from the VM thread");
  45 
  46     _timer->register_gc_phase_start(title, _start_counter);
  47   }
  48 
  49   if (_doit) {
  50     if (PrintGCTimeStamps) {
  51       gclog_or_tty->stamp();
  52       gclog_or_tty->print(": ");
  53     }
  54     gclog_or_tty->print("[%s", title);
  55     gclog_or_tty->flush();
  56   }
  57 }
  58 
  59 GCTraceTime::~GCTraceTime() {
  60   jlong stop_counter = 0;
  61 
  62   if (_doit || _timer != NULL) {
  63     stop_counter = os::elapsed_counter();
  64   }
  65 
  66   if (_timer != NULL) {
  67     _timer->register_gc_phase_end(stop_counter);
  68   }
  69 
  70   if (_doit) {
  71     double seconds = TimeHelper::counter_to_seconds(stop_counter - _start_counter);

  72     if (_print_cr) {
  73       gclog_or_tty->print_cr(", %3.7f secs]", seconds);
  74     } else {
  75       gclog_or_tty->print(", %3.7f secs]", seconds);
  76     }
  77     gclog_or_tty->flush();
  78   }
  79 }

  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_implementation/shared/gcTimer.hpp"
  27 #include "gc_implementation/shared/gcTraceTime.hpp"
  28 #include "runtime/globals.hpp"
  29 #include "runtime/os.hpp"
  30 #include "runtime/safepoint.hpp"
  31 #include "runtime/thread.inline.hpp"
  32 #include "runtime/timer.hpp"
  33 #include "utilities/ostream.hpp"
  34 #include "utilities/ticks.inline.hpp"
  35 
  36 
  37 GCTraceTime::GCTraceTime(const char* title, bool doit, bool print_cr, GCTimer* timer) :
  38     _title(title), _doit(doit), _print_cr(print_cr), _timer(timer), _start_counter() {
  39   if (_doit || _timer != NULL) {
  40     _start_counter.stamp();
  41   }
  42 
  43   if (_timer != NULL) {
  44     assert(SafepointSynchronize::is_at_safepoint(), "Tracing currently only supported at safepoints");
  45     assert(Thread::current()->is_VM_thread(), "Tracing currently only supported from the VM thread");
  46 
  47     _timer->register_gc_phase_start(title, _start_counter);
  48   }
  49 
  50   if (_doit) {
  51     if (PrintGCTimeStamps) {
  52       gclog_or_tty->stamp();
  53       gclog_or_tty->print(": ");
  54     }
  55     gclog_or_tty->print("[%s", title);
  56     gclog_or_tty->flush();
  57   }
  58 }
  59 
  60 GCTraceTime::~GCTraceTime() {
  61   Ticks stop_counter;
  62 
  63   if (_doit || _timer != NULL) {
  64     stop_counter.stamp();
  65   }
  66 
  67   if (_timer != NULL) {
  68     _timer->register_gc_phase_end(stop_counter);
  69   }
  70 
  71   if (_doit) {
  72     const Tickspan duration = stop_counter - _start_counter;
  73     double duration_in_seconds = TicksToTimeHelper::seconds(duration);
  74     if (_print_cr) {
  75       gclog_or_tty->print_cr(", %3.7f secs]", duration_in_seconds);
  76     } else {
  77       gclog_or_tty->print(", %3.7f secs]", duration_in_seconds);
  78     }
  79     gclog_or_tty->flush();
  80   }
  81 }