109 lines
4.6 KiB
Java
109 lines
4.6 KiB
Java
/*
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* Copyright (c) 2024, Oracle and/or its affiliates. All rights reserved.
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* Copyright (c) 2024, Red Hat Inc.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @bug 8332125
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* @summary Test to verify correctness of total malloc and mmap diffs
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* @key randomness
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* @library /test/lib
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* @modules java.base/jdk.internal.misc
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* java.management
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* @build jdk.test.whitebox.WhiteBox
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* @run driver jdk.test.lib.helpers.ClassFileInstaller jdk.test.whitebox.WhiteBox
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* @run main/othervm -Xbootclasspath/a:. -XX:TieredStopAtLevel=1 -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:NativeMemoryTracking=summary -Xms32m -Xmx32m TotalMallocMmapDiffTest
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*
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*/
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import jdk.test.lib.process.OutputAnalyzer;
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import jdk.test.whitebox.WhiteBox;
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public class TotalMallocMmapDiffTest {
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private static final WhiteBox wb = WhiteBox.getWhiteBox();
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private static final long ALLOCATE_SIZE = 250 * 1024 * 1024; // 250MB
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private static final double FUDGE_FACTOR_UPPER = 0.3;
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private static final double FUDGE_FACTOR_LOWER = 0.2;
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private static final double UPPER_BOUND = ALLOCATE_SIZE * (1 + FUDGE_FACTOR_UPPER);
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private static final double LOWER_BOUND = ALLOCATE_SIZE * (1 - FUDGE_FACTOR_LOWER);
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public static void main(String[] args) throws Exception {
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// Get baseline
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OutputAnalyzer output = NMTTestUtils.startJcmdVMNativeMemory("baseline=true", "scale=1");
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output.shouldContain("Baseline taken");
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// Allocate some memory via malloc
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long addr = wb.NMTMalloc(ALLOCATE_SIZE);
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// Virtually reserve and commit memory
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addr = wb.NMTReserveMemory(ALLOCATE_SIZE);
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wb.NMTCommitMemory(addr, ALLOCATE_SIZE);
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// Get NMT diff
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output = NMTTestUtils.startJcmdVMNativeMemory("summary.diff", "scale=1");
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// Verify malloc diff accounts for memory allocation with a fudge factor
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long mallocDiff = getMallocDiff(output);
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if (mallocDiff < LOWER_BOUND || mallocDiff > UPPER_BOUND) {
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throw new Exception("Total malloc diff is incorrect. " +
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"Expected malloc diff range: [" + LOWER_BOUND + " - " + UPPER_BOUND + "]" +
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"Actual malloc diff: " + mallocDiff);
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}
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// Verify mmap diff accounts for reserve and commit
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long reservedDiff = getReservedDiff(output);
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long committedDiff = getCommittedDiff(output);
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if (reservedDiff < LOWER_BOUND || reservedDiff > UPPER_BOUND) {
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throw new Exception("mmap reserved diff is incorrect. " +
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"Expected reserved diff range: [" + LOWER_BOUND + " - " + UPPER_BOUND + "]" +
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"Actual reserved diff: " + reservedDiff);
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}
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if (committedDiff < LOWER_BOUND || committedDiff > UPPER_BOUND) {
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throw new Exception("mmap committed diff is incorrect. " +
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"Expected committed diff range: [" + LOWER_BOUND + " - " + UPPER_BOUND + "]" +
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"Actual committed diff: " + committedDiff);
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}
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}
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private static long getMallocDiff(OutputAnalyzer output) {
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// First match should be global malloc diff
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String malloc = output.firstMatch("malloc=\\d+ \\+(\\d+)", 1);
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return Long.parseLong(malloc);
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}
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private static long getReservedDiff(OutputAnalyzer output) {
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// First match should be global mmap diff
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String reservedDiff = output.firstMatch("mmap: reserved=\\d+ \\+(\\d+)", 1);
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return Long.parseLong(reservedDiff);
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}
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private static long getCommittedDiff(OutputAnalyzer output) {
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// First match should be global mmap diff
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String committedDiff = output.firstMatch("mmap: reserved=\\d+ \\+\\d+, committed=\\d+ \\+(\\d+)", 1);
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return Long.parseLong(committedDiff);
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}
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}
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