Mercurial > hg > graal-jvmci-8
view test/gc/g1/TestShrinkAuxiliaryData.java @ 23232:884effd52993
Merge
author | asaha |
---|---|
date | Wed, 08 Jul 2015 15:25:40 -0700 |
parents | e5406a79ae90 |
children |
line wrap: on
line source
/* * Copyright (c) 2014, 2015, 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 com.oracle.java.testlibrary.Asserts; 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; // for ADDRESS_SIZE import sun.hotspot.WhiteBox; public class TestShrinkAuxiliaryData { private static final int REGION_SIZE = 1024 * 1024; private final static String[] initialOpts = new String[]{ "-XX:MinHeapFreeRatio=10", "-XX:MaxHeapFreeRatio=11", "-XX:+UseG1GC", "-XX:G1HeapRegionSize=" + REGION_SIZE, "-XX:-ExplicitGCInvokesConcurrent", "-XX:+PrintGCDetails", "-XX:+UnlockDiagnosticVMOptions", "-XX:+WhiteBoxAPI", "-Xbootclasspath/a:.", }; private final int hotCardTableSize; protected TestShrinkAuxiliaryData(int hotCardTableSize) { this.hotCardTableSize = hotCardTableSize; } 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 < hotCardTableSize) { System.out.format("Skiping test for %d cache size due max cache size %d", hotCardTableSize, maxCacheSize ); return; } printTestInfo(maxCacheSize); vmOpts.add("-XX:G1ConcRSLogCacheSize=" + hotCardTableSize); vmOpts.addAll(Arrays.asList(Utils.getTestJavaOpts())); // 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()); System.out.println(output.getStdout()); System.err.println(output.getStderr()); 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().maxMemory()), grouped.format(Runtime.getRuntime().maxMemory() - 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 { ShrinkAuxiliaryDataTest testCase = new ShrinkAuxiliaryDataTest(); if (!testCase.checkEnvApplicability()) { return; } testCase.test(); } /** * Checks is this environment suitable to run this test * - memory is enough to decommit (page size is not big) * - RSet cache size is not too big * * @return true if test could run, false if test should be skipped */ protected boolean checkEnvApplicability() { int pageSize = WhiteBox.getWhiteBox().getVMPageSize(); System.out.println( "Page size = " + pageSize + " region size = " + REGION_SIZE + " aux data ~= " + (REGION_SIZE * 3 / 100)); // If auxdata size will be less than page size it wouldn't decommit. // Auxiliary data size is about ~3.6% of heap size. if (pageSize >= REGION_SIZE * 3 / 100) { System.out.format("Skipping test for too large page size = %d", pageSize ); return false; } if (REGION_SIZE * REGIONS_TO_ALLOCATE > Runtime.getRuntime().maxMemory()) { System.out.format("Skipping test for too low available memory. " + "Need %d, available %d", REGION_SIZE * REGIONS_TO_ALLOCATE, Runtime.getRuntime().maxMemory() ); return false; } return true; } 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() throws IOException { MemoryUsage muFull, muFree, muAuxDataFull, muAuxDataFree; float auxFull, auxFree; allocate(); link(); mutate(); muFull = ManagementFactory.getMemoryMXBean().getHeapMemoryUsage(); long numUsedRegions = WhiteBox.getWhiteBox().g1NumMaxRegions() - WhiteBox.getWhiteBox().g1NumFreeRegions(); muAuxDataFull = WhiteBox.getWhiteBox().g1AuxiliaryMemoryUsage(); auxFull = (float)muAuxDataFull.getUsed() / numUsedRegions; System.out.format("Full aux data ratio= %f, regions max= %d, used= %d\n", auxFull, WhiteBox.getWhiteBox().g1NumMaxRegions(), numUsedRegions ); deallocate(); System.gc(); muFree = ManagementFactory.getMemoryMXBean().getHeapMemoryUsage(); muAuxDataFree = WhiteBox.getWhiteBox().g1AuxiliaryMemoryUsage(); numUsedRegions = WhiteBox.getWhiteBox().g1NumMaxRegions() - WhiteBox.getWhiteBox().g1NumFreeRegions(); auxFree = (float)muAuxDataFree.getUsed() / numUsedRegions; System.out.format("Free aux data ratio= %f, regions max= %d, used= %d\n", auxFree, WhiteBox.getWhiteBox().g1NumMaxRegions(), numUsedRegions ); Asserts.assertLessThanOrEqual(muFree.getCommitted(), muFull.getCommitted(), String.format("heap decommit failed - full > free: %d > %d", muFree.getCommitted(), muFull.getCommitted() ) ); System.out.format("State used committed\n"); System.out.format("Full aux data: %10d %10d\n", muAuxDataFull.getUsed(), muAuxDataFull.getCommitted()); System.out.format("Free aux data: %10d %10d\n", muAuxDataFree.getUsed(), muAuxDataFree.getCommitted()); // if decommited check that aux data has same ratio if (muFree.getCommitted() < muFull.getCommitted()) { Asserts.assertLessThanOrEqual(auxFree, auxFull, String.format("auxiliary data decommit failed - full > free: %f > %f", auxFree, auxFull ) ); } } 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 REGIONS_TO_ALLOCATE = 100; private static final int NUM_OBJECTS_PER_REGION = 10; private static final int NUM_LINKS = 20; // how many links create for each object } }