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/*
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* Copyright (c) 2014, Oracle and/or its affiliates. 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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import com.oracle.java.testlibrary.Asserts;
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import java.lang.management.MemoryPoolMXBean;
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import java.util.HashMap;
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import java.util.Map;
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import sun.hotspot.code.BlobType;
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/*
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* @test GetUsageTest
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* @library /testlibrary /../../test/lib
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* @build GetUsageTest
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* @run main ClassFileInstaller sun.hotspot.WhiteBox
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* sun.hotspot.WhiteBox$WhiteBoxPermission
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* @run main/othervm -Xbootclasspath/a:. -XX:CompileCommand=compileonly,null::*
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* -XX:-UseCodeCacheFlushing -XX:-MethodFlushing -XX:+SegmentedCodeCache
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* -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI GetUsageTest
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* @summary testing of getUsage() for segmented code cache
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*/
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public class GetUsageTest {
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private final BlobType btype;
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private final int allocateSize;
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public GetUsageTest(BlobType btype, int allocSize) {
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this.btype = btype;
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this.allocateSize = allocSize;
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}
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public static void main(String[] args) throws Exception {
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for (BlobType btype : BlobType.getAvailable()) {
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if (CodeCacheUtils.isCodeHeapPredictable(btype)) {
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for (int allocSize = 10; allocSize < 100000; allocSize *= 10) {
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new GetUsageTest(btype, allocSize).runTest();
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}
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}
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}
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}
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protected final Map<MemoryPoolMXBean, Long> getBeanUsages() {
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Map<MemoryPoolMXBean, Long> beanUsages = new HashMap<>();
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for (BlobType bt : BlobType.getAvailable()) {
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beanUsages.put(bt.getMemoryPool(),
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bt.getMemoryPool().getUsage().getUsed());
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}
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return beanUsages;
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}
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protected void runTest() {
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MemoryPoolMXBean[] predictableBeans = BlobType.getAvailable().stream()
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.filter(CodeCacheUtils::isCodeHeapPredictable)
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.map(BlobType::getMemoryPool)
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.toArray(MemoryPoolMXBean[]::new);
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Map<MemoryPoolMXBean, Long> initial = getBeanUsages();
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long addr = 0;
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try {
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addr = CodeCacheUtils.WB.allocateCodeBlob(allocateSize, btype.id);
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Map<MemoryPoolMXBean, Long> current = getBeanUsages();
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long blockCount = Math.floorDiv(allocateSize
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+ CodeCacheUtils.getHeaderSize(btype)
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+ CodeCacheUtils.SEGMENT_SIZE - 1, CodeCacheUtils.SEGMENT_SIZE);
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long usageUpperEstimate = Math.max(blockCount,
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CodeCacheUtils.MIN_BLOCK_LENGTH) * CodeCacheUtils.SEGMENT_SIZE;
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for (MemoryPoolMXBean entry : predictableBeans) {
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long diff = current.get(entry) - initial.get(entry);
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if (entry.equals(btype.getMemoryPool())) {
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Asserts.assertFalse(diff <= 0L || diff > usageUpperEstimate,
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String.format("Pool %s usage increase was reported "
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+ "unexpectedly as increased by %d using "
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+ "allocation size %d", entry.getName(),
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diff, allocateSize));
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} else {
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Asserts.assertEQ(diff, 0L,
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String.format("Pool %s usage changed unexpectedly while"
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+ " trying to increase: %s using allocation "
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+ "size %d", entry.getName(),
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btype.getMemoryPool().getName(), allocateSize));
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}
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}
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} finally {
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if (addr != 0) {
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CodeCacheUtils.WB.freeCodeBlob(addr);
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}
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}
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System.out.printf("INFO: Scenario finished successfully for %s%n",
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btype.getMemoryPool().getName());
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}
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}
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