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TestMemoryAwareness.java
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TestMemoryAwareness.java
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/*
* Copyright (c) 2017, 2021, 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.
*/
/*
* @test
* @key cgroups
* @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.base/jdk.internal.platform
* java.management
* jdk.jartool/sun.tools.jar
* @build AttemptOOM sun.hotspot.WhiteBox PrintContainerInfo CheckOperatingSystemMXBean
* @run driver jdk.test.lib.helpers.ClassFileInstaller -jar whitebox.jar sun.hotspot.WhiteBox
* @run driver TestMemoryAwareness
*/
import jdk.test.lib.containers.docker.Common;
import jdk.test.lib.containers.docker.DockerRunOptions;
import jdk.test.lib.containers.docker.DockerTestUtils;
import jdk.test.lib.process.OutputAnalyzer;
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.buildJdkContainerImage(imageName);
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);
testOperatingSystemMXBeanAwareness(
"100M", Integer.toString(((int) Math.pow(2, 20)) * 100),
"150M", Integer.toString(((int) Math.pow(2, 20)) * (150 - 100))
);
testOperatingSystemMXBeanAwareness(
"128M", Integer.toString(((int) Math.pow(2, 20)) * 128),
"256M", Integer.toString(((int) Math.pow(2, 20)) * (256 - 128))
);
testOperatingSystemMXBeanAwareness(
"1G", Integer.toString(((int) Math.pow(2, 20)) * 1024),
"1500M", Integer.toString(((int) Math.pow(2, 20)) * (1500 - 1024))
);
} finally {
if (!DockerTestUtils.RETAIN_IMAGE_AFTER_TEST) {
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);
// make sure we avoid inherited Xmx settings from the jtreg vmoptions
// set Xmx ourselves instead
System.out.println("sizeToAllocInMb is:" + sizeToAllocInMb + " sizeToAllocInMb/2 is:" + sizeToAllocInMb/2);
String javaHeapSize = sizeToAllocInMb/2 + "m";
opts.addJavaOptsAppended("-Xmx" + javaHeapSize);
OutputAnalyzer out = DockerTestUtils.dockerRunJava(opts);
if (out.getExitValue() == 0) {
throw new RuntimeException("We exited successfully, but we wanted to provoke an OOM inside the container");
}
out.shouldContain("Entering AttemptOOM main")
.shouldNotContain("AttemptOOM allocation successful")
.shouldContain("java.lang.OutOfMemoryError");
}
private static void testOperatingSystemMXBeanAwareness(String memoryAllocation, String expectedMemory,
String swapAllocation, String expectedSwap) throws Exception {
Common.logNewTestCase("Check OperatingSystemMXBean");
DockerRunOptions opts = Common.newOpts(imageName, "CheckOperatingSystemMXBean")
.addDockerOpts(
"--memory", memoryAllocation,
"--memory-swap", swapAllocation
)
// CheckOperatingSystemMXBean uses Metrics (jdk.internal.platform) for
// diagnostics
.addJavaOpts("--add-exports")
.addJavaOpts("java.base/jdk.internal.platform=ALL-UNNAMED");
OutputAnalyzer out = DockerTestUtils.dockerRunJava(opts);
out.shouldHaveExitValue(0)
.shouldContain("Checking OperatingSystemMXBean")
.shouldContain("OperatingSystemMXBean.getTotalPhysicalMemorySize: " + expectedMemory)
.shouldContain("OperatingSystemMXBean.getTotalMemorySize: " + expectedMemory)
.shouldMatch("OperatingSystemMXBean\\.getFreeMemorySize: [1-9][0-9]+")
.shouldMatch("OperatingSystemMXBean\\.getFreePhysicalMemorySize: [1-9][0-9]+");
// in case of warnings like : "Your kernel does not support swap limit capabilities
// or the cgroup is not mounted. Memory limited without swap."
// the getTotalSwapSpaceSize and getFreeSwapSpaceSize return the system
// values as the container setup isn't supported in that case.
try {
out.shouldContain("OperatingSystemMXBean.getTotalSwapSpaceSize: " + expectedSwap);
} catch(RuntimeException ex) {
out.shouldMatch("OperatingSystemMXBean.getTotalSwapSpaceSize: [0-9]+");
}
try {
out.shouldMatch("OperatingSystemMXBean\\.getFreeSwapSpaceSize: [1-9][0-9]+");
} catch(RuntimeException ex) {
out.shouldMatch("OperatingSystemMXBean\\.getFreeSwapSpaceSize: 0");
}
}
}