/* * Copyright (c) 2013, 2018, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions.
*/ package jdk.test.lib.jfr;
privatesynchronizedstatic RecordedEvent getTimeStampCounterEvent() throws IOException, Exception { if (timeStampCounterEvent == null) { try (Recording r = new Recording()) {
r.enable(EventNames.CPUTimeStampCounter);
r.start();
r.stop();
Path p = Utils.createTempFile("timestamo", ".jfr");
r.dump(p);
List<RecordedEvent> events = RecordingFile.readAllEvents(p);
Files.deleteIfExists(p); if (events.isEmpty()) { thrownew Exception("Could not locate CPUTimeStampCounter event");
}
timeStampCounterEvent = events.get(0);
}
} return timeStampCounterEvent;
}
publicstaticvoid waitForSystemCurrentMillisToChange() { long t = System.currentTimeMillis(); while (t == System.currentTimeMillis()) { try { Thread.sleep(2);
} catch (InterruptedException e) { thrownew Error("Sleep interupted", e);
}
}
}
}
Messung V0.5
¤ Die Informationen auf dieser Webseite wurden
nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit,
noch Qualität der bereit gestellten Informationen zugesichert.0.12Bemerkung:
(vorverarbeitet)
¤
Die Informationen auf dieser Webseite wurden
nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit,
noch Qualität der bereit gestellten Informationen zugesichert.
Bemerkung:
Die farbliche Syntaxdarstellung und die Messung sind noch experimentell.