/*
* Copyright (c) 2018, 2021, 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-ccs-noreclaim
* @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 -XX:MetaspaceReclaimPolicy=none PrintMetaspaceDcmd
*/
/*
* @test id=test-64bit-ccs-aggressivereclaim
* @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 -XX:MetaspaceReclaimPolicy=aggressive PrintMetaspaceDcmd
*/
/*
* @test id=test-64bit-ccs-guarded
* @summary Test the VM.metaspace command
* @requires vm.bits == "64"
* @requires vm.debug == true
* @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 -XX:+UnlockDiagnosticVMOptions -XX:+MetaspaceGuardAllocations 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.*<bootstrap>");
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]: - <Chunk @0x00007f925c124090, state f, base 0x00007f9208600000, level lv01 (262144 words), used 0 words, committed 0 words.> - total : 1 chunks.
// -- List[lv02]: - <Chunk @0x00007f925c1240d8, state f, base 0x00007f9208500000, level lv02 (131072 words), used 0 words, committed 0 words.> - 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");
}
}
}