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/*
* Copyright (c) 2019, 2020, Red Hat, Inc. All rights reserved.
*
* 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 nmt jcmd
* @library /test/lib
* @requires vm.bits == 64
* @modules java.base/jdk.internal.misc
* java.management
* @build sun.hotspot.WhiteBox
* @run driver ClassFileInstaller sun.hotspot.WhiteBox
* sun.hotspot.WhiteBox$WhiteBoxPermission
* @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:NativeMemoryTracking=detail HugeArenaTracking
*/
import java.util.Random;
import jdk.test.lib.process.ProcessTools;
import jdk.test.lib.process.OutputAnalyzer;
import jdk.test.lib.JDKToolFinder;
import sun.hotspot.WhiteBox;
public class HugeArenaTracking {
private static final long GB = 1024 * 1024 * 1024;
public static void main(String args[]) throws Exception {
OutputAnalyzer output;
final WhiteBox wb = WhiteBox.getWhiteBox();
// Grab my own PID
String pid = Long.toString(ProcessTools.getProcessId());
ProcessBuilder pb = new ProcessBuilder();
long arena1 = wb.NMTNewArena(1024);
long arena2 = wb.NMTNewArena(1024);
// Run 'jcmd <pid> VM.native_memory summary'
pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.native_memory", "summary"});
output = new OutputAnalyzer(pb.start());
output.shouldContain("Test (reserved=2KB, committed=2KB)");
Random rand = new Random();
// Allocate 2GB+ from arena
long total = 0;
while (total < 2 * GB) {
// Cap to 10M
long inc = rand.nextInt(10 * 1024 * 1024);
wb.NMTArenaMalloc(arena1, inc);
total += inc;
}
ProcessBuilder pb2 = new ProcessBuilder();
// Run 'jcmd <pid> VM.native_memory summary'
pb2.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.native_memory", "summary", "scale=GB"});
output = new OutputAnalyzer(pb2.start());
output.shouldContain("Test (reserved=2GB, committed=2GB)");
wb.NMTFreeArena(arena1);
output = new OutputAnalyzer(pb.start());
output.shouldContain("Test (reserved=1KB, committed=1KB)");
wb.NMTFreeArena(arena2);
output = new OutputAnalyzer(pb.start());
output.shouldNotContain("Test (reserved");
}
}
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