64 lines
2.6 KiB
Java
64 lines
2.6 KiB
Java
/*
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* Copyright (c) 2015, 2016, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @summary Test checks output displayed with jstat -gccause.
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* Test scenario:
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* tests forces debuggee application eat ~70% of heap and runs jstat.
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* jstat should show that ~70% of heap (OC/OU ~= 70%).
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* @requires vm.opt.ExplicitGCInvokesConcurrent != true
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* @modules java.base/jdk.internal.misc
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* @library /test/lib
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* @library ../share
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* @run main/othervm -XX:+UsePerfData -XX:InitialHeapSize=128M -XX:MaxHeapSize=128M -XX:MaxMetaspaceSize=128M GcCauseTest02
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*/
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import utils.*;
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public class GcCauseTest02 {
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private final static float targetMemoryUsagePercent = 0.7f;
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public static void main(String[] args) throws Exception {
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// We will be running "jstat -gc" tool
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JstatGcCauseTool jstatGcTool = new JstatGcCauseTool(ProcessHandle.current().getPid());
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// Run once and get the results asserting that they are reasonable
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JstatGcCauseResults measurement1 = jstatGcTool.measure();
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measurement1.assertConsistency();
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GcProvoker gcProvoker = new GcProvoker();
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// Eat metaspace and heap then run the tool again and get the results asserting that they are reasonable
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gcProvoker.allocateAvailableMetaspaceAndHeap(targetMemoryUsagePercent);
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// Collect garbage. Also update VM statistics
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System.gc();
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JstatGcCauseResults measurement2 = jstatGcTool.measure();
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measurement2.assertConsistency();
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// Assert that space has been utilized acordingly
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JstatResults.assertSpaceUtilization(measurement2, targetMemoryUsagePercent);
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}
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}
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