| /* |
| * Copyright (c) 2014, 2016, Oracle 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. |
| */ |
| |
| /* |
| * @test InitialAndMaxUsageTest |
| * @summary testing of initial and max usage |
| * @modules java.base/jdk.internal.misc |
| * java.management |
| * @library /test/lib / |
| * |
| * @build sun.hotspot.WhiteBox |
| * @run driver ClassFileInstaller sun.hotspot.WhiteBox |
| * sun.hotspot.WhiteBox$WhiteBoxPermission |
| * @run main/othervm -Xbootclasspath/a:. -XX:-UseCodeCacheFlushing |
| * -XX:-MethodFlushing -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI |
| * -XX:CompileCommand=compileonly,null::* -XX:-UseLargePages |
| * -XX:+SegmentedCodeCache |
| * compiler.codecache.jmx.InitialAndMaxUsageTest |
| * @run main/othervm -Xbootclasspath/a:. -XX:-UseCodeCacheFlushing |
| * -XX:-MethodFlushing -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI |
| * -XX:CompileCommand=compileonly,null::* -XX:-UseLargePages |
| * -XX:-SegmentedCodeCache |
| * compiler.codecache.jmx.InitialAndMaxUsageTest |
| */ |
| |
| package compiler.codecache.jmx; |
| |
| import jdk.test.lib.Asserts; |
| import sun.hotspot.code.BlobType; |
| |
| import java.lang.management.MemoryPoolMXBean; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| public class InitialAndMaxUsageTest { |
| |
| private static final double CACHE_USAGE_COEF = 0.95d; |
| private final BlobType btype; |
| private final boolean lowerBoundIsZero; |
| private final long maxSize; |
| |
| public InitialAndMaxUsageTest(BlobType btype) { |
| this.btype = btype; |
| this.maxSize = btype.getSize(); |
| /* Only profiled code cache initial size should be 0, because of |
| -XX:CompileCommand=compileonly,null::* non-methods might be not empty, |
| as well as non-profiled methods, because it's used as fallback in |
| case non-methods is full */ |
| lowerBoundIsZero = btype == BlobType.MethodProfiled; |
| } |
| |
| public static void main(String[] args) { |
| for (BlobType btype : BlobType.getAvailable()) { |
| new InitialAndMaxUsageTest(btype).runTest(); |
| } |
| } |
| |
| private void fillWithSize(long size, List<Long> blobs, MemoryPoolMXBean bean) { |
| long blob; |
| /* Don't fill too much to have space for adapters. So, stop after crossing 95% and |
| don't allocate in case we'll cross 97% on next allocation. We can hit situation |
| like 94% -> (1 allocation) -> 100% otherwise. So, check if |
| <Usage + allocatedSize> is less than 97%, then allocate in case it is, then, stop |
| further allocations with given size in case <Usage> more than 95% */ |
| while (((double) bean.getUsage().getUsed() + size <= (CACHE_USAGE_COEF + 0.02d) * maxSize) |
| && (blob = CodeCacheUtils.WB.allocateCodeBlob(size, btype.id)) != 0L |
| && ((double) bean.getUsage().getUsed() <= CACHE_USAGE_COEF * maxSize)) { |
| blobs.add(blob); |
| } |
| } |
| |
| protected void runTest() { |
| long headerSize = CodeCacheUtils.getHeaderSize(btype); |
| MemoryPoolMXBean bean = btype.getMemoryPool(); |
| long initialUsage = btype.getMemoryPool().getUsage().getUsed(); |
| System.out.printf("INFO: trying to test %s of max size %d and initial" |
| + " usage %d%n", bean.getName(), maxSize, initialUsage); |
| Asserts.assertLT(initialUsage + headerSize + 1L, maxSize, |
| "Initial usage is close to total size for " + bean.getName()); |
| if (lowerBoundIsZero) { |
| Asserts.assertEQ(initialUsage, 0L, "Unexpected initial usage"); |
| } |
| ArrayList<Long> blobs = new ArrayList<>(); |
| long minAllocationUnit = Math.max(1, CodeCacheUtils.MIN_ALLOCATION - headerSize); |
| /* now filling code cache with large-sized allocation first, since |
| lots of small allocations takes too much time, so, just a small |
| optimization */ |
| try { |
| for (int coef = 1000000; coef > 0; coef /= 10) { |
| fillWithSize(coef * minAllocationUnit, blobs, bean); |
| } |
| Asserts.assertGT((double) bean.getUsage().getUsed(), |
| CACHE_USAGE_COEF * maxSize, String.format("Unable to fill " |
| + "more than %f of %s. Reported usage is %d ", |
| CACHE_USAGE_COEF, bean.getName(), |
| bean.getUsage().getUsed())); |
| } finally { |
| for (long entry : blobs) { |
| CodeCacheUtils.WB.freeCodeBlob(entry); |
| } |
| } |
| System.out.printf("INFO: Scenario finished successfully for %s%n", |
| bean.getName()); |
| } |
| |
| } |