16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package jdk.jfr.event.os;
  27 
  28 import java.util.List;
  29 
  30 import jdk.jfr.Recording;
  31 import jdk.jfr.consumer.RecordedEvent;
  32 import jdk.test.lib.jfr.EventNames;
  33 import jdk.test.lib.jfr.Events;
  34 
  35 
  36 /*
  37  * @test
  38  * @key jfr

  39  * @library /test/lib
  40  * @run main/othervm jdk.jfr.event.os.TestCPULoad
  41  */
  42 public class TestCPULoad {
  43     private final static String EVENT_NAME = EventNames.CPULoad;
  44 
  45     public static void main(String[] args) throws Throwable {
  46         Recording recording = new Recording();
  47         recording.enable(EVENT_NAME);
  48         recording.start();
  49         // Need to sleep so a time delta can be calculated
  50         Thread.sleep(100);
  51         recording.stop();
  52 
  53         List<RecordedEvent> events = Events.fromRecording(recording);
  54         if (events.isEmpty()) {
  55             // CPU Load events are unreliable on Windows because
  56             // the way processes are identified with perf. counters.
  57             // See BUG 8010378.
  58             // Workaround is to detect Windows and allow

  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package jdk.jfr.event.os;
  27 
  28 import java.util.List;
  29 
  30 import jdk.jfr.Recording;
  31 import jdk.jfr.consumer.RecordedEvent;
  32 import jdk.test.lib.jfr.EventNames;
  33 import jdk.test.lib.jfr.Events;
  34 
  35 
  36 /**
  37  * @test
  38  * @key jfr
  39  * @requires vm.hasJFR
  40  * @library /test/lib
  41  * @run main/othervm jdk.jfr.event.os.TestCPULoad
  42  */
  43 public class TestCPULoad {
  44     private final static String EVENT_NAME = EventNames.CPULoad;
  45 
  46     public static void main(String[] args) throws Throwable {
  47         Recording recording = new Recording();
  48         recording.enable(EVENT_NAME);
  49         recording.start();
  50         // Need to sleep so a time delta can be calculated
  51         Thread.sleep(100);
  52         recording.stop();
  53 
  54         List<RecordedEvent> events = Events.fromRecording(recording);
  55         if (events.isEmpty()) {
  56             // CPU Load events are unreliable on Windows because
  57             // the way processes are identified with perf. counters.
  58             // See BUG 8010378.
  59             // Workaround is to detect Windows and allow