jdk-24/test/hotspot/jtreg/runtime/containers/docker/TestMemoryAwareness.java

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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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,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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/*
 * @test
 * @summary Test JVM's memory resource awareness when running inside docker container
 * @requires docker.support
 * @library /test/lib
 * @modules java.base/jdk.internal.misc
 *          java.management
 *          jdk.jartool/sun.tools.jar
 * @build Common AttemptOOM sun.hotspot.WhiteBox PrintContainerInfo
 * @run driver ClassFileInstaller -jar whitebox.jar sun.hotspot.WhiteBox sun.hotspot.WhiteBox$WhiteBoxPermission
 * @run driver TestMemoryAwareness
 */
import jdk.test.lib.containers.docker.DockerRunOptions;
import jdk.test.lib.containers.docker.DockerTestUtils;


public class TestMemoryAwareness {
    private static final String imageName = Common.imageName("memory");

    public static void main(String[] args) throws Exception {
        if (!DockerTestUtils.canTestDocker()) {
            return;
        }

        Common.prepareWhiteBox();
        DockerTestUtils.buildJdkDockerImage(imageName, "Dockerfile-BasicTest", "jdk-docker");

        try {
            testMemoryLimit("100m", "104857600");
            testMemoryLimit("500m", "524288000");
            testMemoryLimit("1g", "1073741824");
            testMemoryLimit("4g", "4294967296");

            testMemorySoftLimit("500m", "524288000");
            testMemorySoftLimit("1g", "1073741824");

            // Add extra 10 Mb to allocator limit, to be sure to cause OOM
            testOOM("256m", 256 + 10);

        } finally {
            DockerTestUtils.removeDockerImage(imageName);
        }
    }


    private static void testMemoryLimit(String valueToSet, String expectedTraceValue)
            throws Exception {

        Common.logNewTestCase("memory limit: " + valueToSet);

        DockerRunOptions opts = Common.newOpts(imageName)
            .addDockerOpts("--memory", valueToSet);

        Common.run(opts)
            .shouldMatch("Memory Limit is:.*" + expectedTraceValue);
    }


    private static void testMemorySoftLimit(String valueToSet, String expectedTraceValue)
            throws Exception {
        Common.logNewTestCase("memory soft limit: " + valueToSet);

        DockerRunOptions opts = Common.newOpts(imageName, "PrintContainerInfo");
        Common.addWhiteBoxOpts(opts);
        opts.addDockerOpts("--memory-reservation=" + valueToSet);

        Common.run(opts)
            .shouldMatch("Memory Soft Limit.*" + expectedTraceValue);
    }


    // provoke OOM inside the container, see how VM reacts
    private static void testOOM(String dockerMemLimit, int sizeToAllocInMb) throws Exception {
        Common.logNewTestCase("OOM");

        DockerRunOptions opts = Common.newOpts(imageName, "AttemptOOM")
            .addDockerOpts("--memory", dockerMemLimit, "--memory-swap", dockerMemLimit);
        opts.classParams.add("" + sizeToAllocInMb);

        DockerTestUtils.dockerRunJava(opts)
            .shouldHaveExitValue(1)
            .shouldContain("Entering AttemptOOM main")
            .shouldNotContain("AttemptOOM allocation successful")
            .shouldContain("java.lang.OutOfMemoryError");
    }

}