112 lines
4.3 KiB
Java
112 lines
4.3 KiB
Java
/*
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* Copyright (c) 2019, 2023, Red Hat, Inc. All rights reserved.
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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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/*
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* @test
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* @key randomness
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* @library /test/lib
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* @requires vm.bits == 64
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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:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:NativeMemoryTracking=summary HugeArenaTracking
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*/
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import java.util.Random;
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import jdk.test.lib.process.ProcessTools;
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import jdk.test.lib.process.OutputAnalyzer;
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import jdk.test.lib.Utils;
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import jdk.test.whitebox.WhiteBox;
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public class HugeArenaTracking {
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private static final long MB = 1024 * 1024;
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private static final long GB = MB * 1024;
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public static void main(String args[]) throws Exception {
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final WhiteBox wb = WhiteBox.getWhiteBox();
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long arena1 = wb.NMTNewArena(1024);
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long arena2 = wb.NMTNewArena(1024);
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NMTTestUtils.runJcmdSummaryReportAndCheckOutput(
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new String[] { "scale=K" },
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new String[] { "Test (reserved=2KB, committed=2KB)",
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"(arena=2KB #2) (at peak)" });
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Random rand = Utils.getRandomInstance();
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// Allocate 2GB+ from arena
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long total = 0;
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while (total < 2 * GB) {
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wb.NMTArenaMalloc(arena1, MB);
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total += MB;
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}
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// run a report at GB level. We should see our allocations; since they are rounded
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// to GB, we expect an exact output match
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NMTTestUtils.runJcmdSummaryReportAndCheckOutput(
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new String[] { "scale=G" },
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new String[] { "Test (reserved=2GB, committed=2GB)",
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"(arena=2GB #2) (at peak)" });
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// Repeat at MB level; we expect the same behavior
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NMTTestUtils.runJcmdSummaryReportAndCheckOutput(
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new String[] { "scale=M" },
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new String[] { "Test (reserved=2048MB, committed=2048MB)",
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"(arena=2048MB #2) (at peak)" });
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wb.NMTFreeArena(arena1);
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// Repeat report at GB level. Reserved should be 0 now. Current usage is 1KB, since arena2 is left, but that
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// is below GB scale threshold, so should show up as 0.
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NMTTestUtils.runJcmdSummaryReportAndCheckOutput(
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new String[] { "scale=G" },
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new String[] { "Test (reserved=0GB, committed=0GB)",
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"(arena=0GB #1) (peak=2GB #2)" });
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// Same, for MB scale
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NMTTestUtils.runJcmdSummaryReportAndCheckOutput(
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new String[] { "scale=M" },
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new String[] { "Test (reserved=0MB, committed=0MB)",
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"(arena=0MB #1) (peak=2048MB #2)" });
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// At KB level we should see the remaining 1KB. Note that we refrain from testing peak here
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// since the number gets fuzzy: it depends on the size of the initially allocated chunk. At MB
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// and GB scale, these differences don't matter.
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NMTTestUtils.runJcmdSummaryReportAndCheckOutput(
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new String[] { "scale=K" },
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new String[] { "Test (reserved=1KB, committed=1KB)",
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"(arena=1KB #1) (peak=" });
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wb.NMTFreeArena(arena2);
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// Everything free'd, current usage 0, peak should be preserved.
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NMTTestUtils.runJcmdSummaryReportAndCheckOutput(
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new String[] { "scale=G" },
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new String[] { "Test (reserved=0GB, committed=0GB)",
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"(arena=0GB #0) (peak=2GB #2)" });
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}
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}
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