/* * Copyright (c) 2018, 2024, Oracle and/or its affiliates. All rights reserved. * Copyright (c) 2018, SAP 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. */ import jdk.test.lib.process.ProcessTools; import jdk.test.lib.process.OutputAnalyzer; import jdk.test.lib.JDKToolFinder; /* * @test id=test-64bit-ccs * @summary Test the VM.metaspace command * @requires vm.bits == "64" * @library /test/lib * @modules java.base/jdk.internal.misc * java.management * @run main/othervm -Dwith-compressed-class-space -XX:MaxMetaspaceSize=201M -Xmx100M -XX:+UseCompressedOops -XX:+UseCompressedClassPointers PrintMetaspaceDcmd */ /* * @test id=test-64bit-noccs * @summary Test the VM.metaspace command * @requires vm.bits == "64" * @library /test/lib * @modules java.base/jdk.internal.misc * java.management * @run main/othervm -Dwithout-compressed-class-space -XX:MaxMetaspaceSize=201M -Xmx100M -XX:-UseCompressedOops -XX:-UseCompressedClassPointers PrintMetaspaceDcmd */ /* * @test id=test-nospecified * @summary Test the VM.metaspace command * @requires vm.bits == "64" * @library /test/lib * @modules java.base/jdk.internal.misc * java.management * @run main/othervm -Dno-specified-flag -Xmx100M -XX:-UseCompressedOops -XX:-UseCompressedClassPointers PrintMetaspaceDcmd */ /* * @test test-32bit * @summary Test the VM.metaspace command * @requires vm.bits == "32" * @library /test/lib * @modules java.base/jdk.internal.misc * java.management * @run main/othervm -Dwithout-compressed-class-space -XX:MaxMetaspaceSize=201M -Xmx100M PrintMetaspaceDcmd */ public class PrintMetaspaceDcmd { private static void doTheNoSpecifiedPropTest() throws Exception { ProcessBuilder pb = new ProcessBuilder(); OutputAnalyzer output; // Grab my own PID String pid = Long.toString(ProcessTools.getProcessId()); pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.metaspace", "basic"}); output = new OutputAnalyzer(pb.start()); output.shouldHaveExitValue(0); output.shouldMatch("MaxMetaspaceSize: unlimited"); } private static void doTheCCSPropTest(boolean usesCompressedClassSpace) throws Exception { ProcessBuilder pb = new ProcessBuilder(); OutputAnalyzer output; // Grab my own PID String pid = Long.toString(ProcessTools.getProcessId()); pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.metaspace", "basic"}); output = new OutputAnalyzer(pb.start()); output.shouldHaveExitValue(0); if (usesCompressedClassSpace) { output.shouldContain("Non-Class:"); output.shouldContain("Class:"); } output.shouldContain("Virtual space:"); output.shouldContain("Chunk freelists:"); output.shouldMatch("MaxMetaspaceSize:.*201.00.*MB"); pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.metaspace"}); output = new OutputAnalyzer(pb.start()); output.shouldHaveExitValue(0); if (usesCompressedClassSpace) { output.shouldContain("Non-Class:"); output.shouldContain("Class:"); } output.shouldContain("Virtual space:"); output.shouldContain("Chunk freelist"); output.shouldContain("Waste"); output.shouldMatch("MaxMetaspaceSize:.*201.00.*MB"); pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.metaspace", "show-loaders"}); output = new OutputAnalyzer(pb.start()); output.shouldHaveExitValue(0); output.shouldMatch("CLD.*"); pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.metaspace", "by-chunktype"}); output = new OutputAnalyzer(pb.start()); output.shouldHaveExitValue(0); output.shouldContain("1k:"); output.shouldContain("2k:"); output.shouldContain("4k:"); output.shouldContain("8k:"); output.shouldContain("16k:"); output.shouldContain("32k:"); output.shouldContain("64k:"); output.shouldContain("128k:"); output.shouldContain("256k:"); output.shouldContain("512k:"); output.shouldContain("1m:"); output.shouldContain("2m:"); output.shouldContain("4m:"); pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.metaspace", "vslist"}); output = new OutputAnalyzer(pb.start()); output.shouldHaveExitValue(0); output.shouldContain("Virtual space list"); output.shouldMatch("node.*reserved.*committed.*used.*"); pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.metaspace", "chunkfreelist"}); // Output should look somewhat like this... // vvvvvvvvvvvvvvvv // Chunk freelist details: // Non-Class: // cm non-class-space: 5 chunks, total word size: 402944. // -- List[lv00]: empty // -- List[lv01]: - - total : 1 chunks. // -- List[lv02]: - - total : 1 chunks. // -- List[lv03]: empty // ..... // // total chunks: 5, total word size: 402944. // ^^^^^^^^^^^^^^^^^ // .... but the actual number of chunks in the freelist is difficult to predict and may be low or zero since // no class unloading happened yet. output = new OutputAnalyzer(pb.start()); output.shouldHaveExitValue(0); output.shouldContain("Chunk freelist details:"); // ... but we should see at least one one chunk somewhere, the list should never be empty. output.shouldMatch(".*-- List\\[lv00\\].*"); output.shouldMatch(".*total chunks.*total word size.*"); // Test with different scales pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.metaspace", "scale=G"}); output = new OutputAnalyzer(pb.start()); output.shouldHaveExitValue(0); output.shouldMatch("MaxMetaspaceSize:.*0.2.*GB"); pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.metaspace", "scale=K"}); output = new OutputAnalyzer(pb.start()); output.shouldHaveExitValue(0); output.shouldMatch("MaxMetaspaceSize:.*205824.00 KB"); pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.metaspace", "scale=1"}); output = new OutputAnalyzer(pb.start()); output.shouldHaveExitValue(0); output.shouldMatch("MaxMetaspaceSize:.*210763776 bytes"); } public static void main(String args[]) throws Exception { if (System.getProperty("no-specified-flag") != null) { doTheNoSpecifiedPropTest(); } else if (System.getProperty("with-compressed-class-space") != null) { doTheCCSPropTest(true); } else if (System.getProperty("without-compressed-class-space") != null) { doTheCCSPropTest(false); } else { throw new IllegalArgumentException("Unrecognized running mode"); } } }