GetSafepointSyncTime.java revision 0
/*
* Copyright 2003 Sun Microsystems, Inc. All Rights Reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
* CA 95054 USA or visit www.sun.com if you need additional information or
* have any questions.
*/
/*
* @test
* @bug 4858522
* @summary Basic unit test of HotspotRuntimeMBean.getSafepointSyncTime()
* @author Steve Bohne
*/
/*
* This test is just a sanity check and does not check for the correct value.
*/
import sun.management.*;
public class GetSafepointSyncTime {
private static HotspotRuntimeMBean mbean =
private static final long NUM_THREAD_DUMPS = 300;
// Careful with these values.
private static final long MIN_VALUE_FOR_PASS = 1;
private static boolean trace = false;
trace = true;
}
// Thread.getAllStackTraces() should cause safepoints.
// If this test is failing because it doesn't,
// MIN_VALUE_FOR_PASS should be reset to 0
for (int i = 0; i < NUM_THREAD_DUMPS; i++) {
}
if (trace) {
}
throw new RuntimeException("Safepoint sync time " +
}
for (int i = 0; i < NUM_THREAD_DUMPS; i++) {
}
if (trace) {
}
throw new RuntimeException("Safepoint sync time " +
"did not increase " +
}
}
}