jdk-24/test/hotspot/jtreg/serviceability/tmtools/jstat/GcTest02.java

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
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 * 2 along with this work; if not, write to the Free Software Foundation,
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/*
 * @test
 * @summary Test checks output displayed with jstat -gc.
 *          Test scenario:
 *          test forces debuggee application eat ~70% of heap and runs jstat.
 *          jstat should show actual usage of old gen (OC/OU ~= old gen usage).
 * @requires vm.opt.ExplicitGCInvokesConcurrent != true
 * @requires vm.gc != "Z"
 * @modules java.base/jdk.internal.misc
 * @library /test/lib
 * @library ../share
 * @run main/othervm -XX:+UsePerfData -XX:MaxNewSize=4m -XX:MaxHeapSize=128M -XX:MaxMetaspaceSize=128M GcTest02
 */
import utils.*;

public class GcTest02 {

    public static void main(String[] args) throws Exception {
        new GarbageProducerTest(new JstatGcTool(ProcessHandle.current().pid())).run();
    }
}