Mercurial > hg > graal-compiler
view test/gc/g1/TestShrinkAuxiliaryData.java @ 22249:60d75935edf2
NodeValueMap: improve javadoc.
author | Josef Eisl <josef.eisl@jku.at> |
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date | Thu, 02 Jul 2015 10:13:58 +0200 |
parents | 7a6313074325 |
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/* * Copyright (c) 2014, 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. */ import static com.oracle.java.testlibrary.Asserts.assertLessThanOrEqual; import com.oracle.java.testlibrary.OutputAnalyzer; import com.oracle.java.testlibrary.Platform; import com.oracle.java.testlibrary.ProcessTools; import com.oracle.java.testlibrary.Utils; import java.io.IOException; import java.lang.management.ManagementFactory; import java.lang.management.MemoryUsage; import java.text.DecimalFormat; import java.text.DecimalFormatSymbols; import java.util.ArrayList; import java.util.Arrays; import java.util.Collections; import java.util.LinkedList; import java.util.List; import sun.misc.Unsafe; public class TestShrinkAuxiliaryData { private final static String[] initialOpts = new String[]{ "-XX:MinHeapFreeRatio=10", "-XX:MaxHeapFreeRatio=11", "-XX:+UseG1GC", "-XX:G1HeapRegionSize=1m", "-XX:-ExplicitGCInvokesConcurrent", "-XX:+PrintGCDetails" }; private final int RSetCacheSize; protected TestShrinkAuxiliaryData(int RSetCacheSize) { this.RSetCacheSize = RSetCacheSize; } protected void test() throws Exception { ArrayList<String> vmOpts = new ArrayList(); Collections.addAll(vmOpts, initialOpts); int maxCacheSize = Math.max(0, Math.min(31, getMaxCacheSize())); if (maxCacheSize < RSetCacheSize) { System.out.format("Skiping test for %d cache size due max cache size %d", RSetCacheSize, maxCacheSize ); return; } printTestInfo(maxCacheSize); vmOpts.add("-XX:G1ConcRSLogCacheSize=" + RSetCacheSize); vmOpts.addAll(Arrays.asList(Utils.getFilteredTestJavaOpts( ShrinkAuxiliaryDataTest.prohibitedVmOptions))); // for 32 bits ObjectAlignmentInBytes is not a option if (Platform.is32bit()) { ArrayList<String> vmOptsWithoutAlign = new ArrayList(vmOpts); vmOptsWithoutAlign.add(ShrinkAuxiliaryDataTest.class.getName()); performTest(vmOptsWithoutAlign); return; } for (int alignment = 3; alignment <= 8; alignment++) { ArrayList<String> vmOptsWithAlign = new ArrayList(vmOpts); vmOptsWithAlign.add("-XX:ObjectAlignmentInBytes=" + (int) Math.pow(2, alignment)); vmOptsWithAlign.add(ShrinkAuxiliaryDataTest.class.getName()); performTest(vmOptsWithAlign); } } private void performTest(List<String> opts) throws Exception { ProcessBuilder pb = ProcessTools.createJavaProcessBuilder( opts.toArray(new String[opts.size()]) ); OutputAnalyzer output = new OutputAnalyzer(pb.start()); output.shouldHaveExitValue(0); } private void printTestInfo(int maxCacheSize) { DecimalFormat grouped = new DecimalFormat("000,000"); DecimalFormatSymbols formatSymbols = grouped.getDecimalFormatSymbols(); formatSymbols.setGroupingSeparator(' '); grouped.setDecimalFormatSymbols(formatSymbols); System.out.format("Test will use %s bytes of memory of %s available%n" + "Available memory is %s with %d bytes pointer size - can save %s pointers%n" + "Max cache size: 2^%d = %s elements%n", grouped.format(ShrinkAuxiliaryDataTest.getMemoryUsedByTest()), grouped.format(Runtime.getRuntime().freeMemory()), grouped.format(Runtime.getRuntime().freeMemory() - ShrinkAuxiliaryDataTest.getMemoryUsedByTest()), Unsafe.ADDRESS_SIZE, grouped.format((Runtime.getRuntime().freeMemory() - ShrinkAuxiliaryDataTest.getMemoryUsedByTest()) / Unsafe.ADDRESS_SIZE), maxCacheSize, grouped.format((int) Math.pow(2, maxCacheSize)) ); } /** * Detects maximum possible size of G1ConcRSLogCacheSize available for * current process based on maximum available process memory size * * @return power of two */ private static int getMaxCacheSize() { long availableMemory = Runtime.getRuntime().freeMemory() - ShrinkAuxiliaryDataTest.getMemoryUsedByTest() - 1l; if (availableMemory <= 0) { return 0; } long availablePointersCount = availableMemory / Unsafe.ADDRESS_SIZE; return (63 - (int) Long.numberOfLeadingZeros(availablePointersCount)); } static class ShrinkAuxiliaryDataTest { public static void main(String[] args) throws IOException { int iterateCount = DEFAULT_ITERATION_COUNT; if (args.length > 0) { try { iterateCount = Integer.parseInt(args[0]); } catch (NumberFormatException e) { //num_iterate remains default } } new ShrinkAuxiliaryDataTest().test(iterateCount); } class GarbageObject { private final List<byte[]> payload = new ArrayList(); private final List<GarbageObject> ref = new LinkedList(); public GarbageObject(int size) { payload.add(new byte[size]); } public void addRef(GarbageObject g) { ref.add(g); } public void mutate() { if (!payload.isEmpty() && payload.get(0).length > 0) { payload.get(0)[0] = (byte) (Math.random() * Byte.MAX_VALUE); } } } private final List<GarbageObject> garbage = new ArrayList(); public void test(int num_iterate) throws IOException { allocate(); link(); mutate(); deallocate(); MemoryUsage muBeforeHeap = ManagementFactory.getMemoryMXBean().getHeapMemoryUsage(); MemoryUsage muBeforeNonHeap = ManagementFactory.getMemoryMXBean().getNonHeapMemoryUsage(); for (int i = 0; i < num_iterate; i++) { allocate(); link(); mutate(); deallocate(); } System.gc(); MemoryUsage muAfterHeap = ManagementFactory.getMemoryMXBean().getHeapMemoryUsage(); MemoryUsage muAfterNonHeap = ManagementFactory.getMemoryMXBean().getNonHeapMemoryUsage(); assertLessThanOrEqual(muAfterHeap.getCommitted(), muBeforeHeap.getCommitted(), String.format("heap decommit failed - after > before: %d > %d", muAfterHeap.getCommitted(), muBeforeHeap.getCommitted() ) ); if (muAfterHeap.getCommitted() < muBeforeHeap.getCommitted()) { assertLessThanOrEqual(muAfterNonHeap.getCommitted(), muBeforeNonHeap.getCommitted(), String.format("non-heap decommit failed - after > before: %d > %d", muAfterNonHeap.getCommitted(), muBeforeNonHeap.getCommitted() ) ); } } private void allocate() { for (int r = 0; r < REGIONS_TO_ALLOCATE; r++) { for (int i = 0; i < NUM_OBJECTS_PER_REGION; i++) { GarbageObject g = new GarbageObject(REGION_SIZE / NUM_OBJECTS_PER_REGION); garbage.add(g); } } } /** * Iterate through all allocated objects, and link to objects in another * regions */ private void link() { for (int ig = 0; ig < garbage.size(); ig++) { int regionNumber = ig / NUM_OBJECTS_PER_REGION; for (int i = 0; i < NUM_LINKS; i++) { int regionToLink; do { regionToLink = (int) (Math.random() * REGIONS_TO_ALLOCATE); } while (regionToLink == regionNumber); // get random garbage object from random region garbage.get(ig).addRef(garbage.get(regionToLink * NUM_OBJECTS_PER_REGION + (int) (Math.random() * NUM_OBJECTS_PER_REGION))); } } } private void mutate() { for (int ig = 0; ig < garbage.size(); ig++) { garbage.get(ig).mutate(); } } private void deallocate() { garbage.clear(); System.gc(); } static long getMemoryUsedByTest() { return REGIONS_TO_ALLOCATE * REGION_SIZE; } private static final int REGION_SIZE = 1024 * 1024; private static final int DEFAULT_ITERATION_COUNT = 1; // iterate main scenario private static final int REGIONS_TO_ALLOCATE = 5; private static final int NUM_OBJECTS_PER_REGION = 10; private static final int NUM_LINKS = 20; // how many links create for each object private static final String[] prohibitedVmOptions = { // remove this when @requires option will be on duty "-XX:\\+UseParallelGC", "-XX:\\+UseSerialGC", "-XX:\\+UseConcMarkSweepGC", "-XX:\\+UseParallelOldGC", "-XX:\\+UseParNewGC", "-Xconcgc", "-Xincgc" }; } }