/*
* 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 .
*
* 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.jfr.event.runtime;
import java.time.Duration;
import java.util.List;
import jdk.jfr.Recording;
import jdk.jfr.consumer.RecordedEvent;
import jdk.jfr.consumer.RecordedThread;
import jdk.test.lib.jfr.EventNames;
import jdk.test.lib.jfr.Events;
/**
* @ test
* @ requires vm . hasJFR
* @ requires vm . gc = = " Parallel " | vm . gc = = null
* @ key jfr
* @ library / test / lib
* @ run main / othervm - XX : + UseParallelGC jdk . jfr . event . runtime . TestVMOperation
*/
public class TestVMOperation {
private static final String EVENT_NAME = EventNames.ExecuteVMOperation;
private static final String VM_OPERATION = "ParallelGCSystemGC" ;
public static void main(String[] args) throws Throwable {
Recording recording = new Recording();
recording.enable(EVENT_NAME).withThreshold(Duration.ofMillis(0 ));
recording.start();
System.gc();
recording.stop();
List<RecordedEvent> events = Events.fromRecording(recording);
Events.hasEvents(events);
for (RecordedEvent event : Events.fromRecording(recording)) {
String operation = Events.assertField(event, "operation" ).notEmpty().getValue();
if (operation.equals(VM_OPERATION)) {
Events.assertField(event, "safepoint" ).equal(true );
Events.assertField(event, "blocking" ).equal(true );
RecordedThread jt = event.getValue("caller" );
if (Thread .currentThread().getName().equals(jt.getJavaName())) {
return ;
}
}
}
throw new AssertionError("No matching event with VM operation name " + VM_OPERATION + " and current threasd as caller" );
}
}
Messung V0.5 in Prozent C=88 H=87 G=87
¤ Dauer der Verarbeitung: 0.3 Sekunden
¤
*© Formatika GbR, Deutschland