Mercurial > hg > graal-jvmci-8
view test/gc/g1/TestLargePageUseForAuxMemory.java @ 23606:324d912186ce
Merge
author | asaha |
---|---|
date | Mon, 21 Dec 2015 10:54:40 -0800 |
parents | 0956bdcc671e |
children |
line wrap: on
line source
/* * Copyright (c) 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. */ /* * @test TestLargePageUseForAuxMemory.java * @bug 8058354 * @key gc * @library /testlibrary /testlibrary/whitebox * @requires (vm.gc=="G1" | vm.gc=="null") * @build TestLargePageUseForAuxMemory * @run main ClassFileInstaller sun.hotspot.WhiteBox * sun.hotspot.WhiteBox$WhiteBoxPermission * @summary Test that auxiliary data structures are allocated using large pages if available. * @run main/othervm -Xbootclasspath/a:. -XX:+UseG1GC -XX:+WhiteBoxAPI -XX:+IgnoreUnrecognizedVMOptions -XX:+UseLargePages TestLargePageUseForAuxMemory */ import com.oracle.java.testlibrary.*; import sun.hotspot.WhiteBox; public class TestLargePageUseForAuxMemory { static final int HEAP_REGION_SIZE = 4 * 1024 * 1024; static long largePageSize; static long smallPageSize; static void checkSmallTables(OutputAnalyzer output, long expectedPageSize) throws Exception { output.shouldContain("G1 'Block offset table': pg_sz=" + expectedPageSize); output.shouldContain("G1 'Card counts table': pg_sz=" + expectedPageSize); } static void checkBitmaps(OutputAnalyzer output, long expectedPageSize) throws Exception { output.shouldContain("G1 'Prev Bitmap': pg_sz=" + expectedPageSize); output.shouldContain("G1 'Next Bitmap': pg_sz=" + expectedPageSize); } static void testVM(long heapsize, boolean cardsShouldUseLargePages, boolean bitmapShouldUseLargePages) throws Exception { ProcessBuilder pb; // Test with large page enabled. pb = ProcessTools.createJavaProcessBuilder("-XX:+UseG1GC", "-XX:G1HeapRegionSize=" + HEAP_REGION_SIZE, "-Xms" + 10 * HEAP_REGION_SIZE, "-Xmx" + heapsize, "-XX:+TracePageSizes", "-XX:+UseLargePages", "-XX:+IgnoreUnrecognizedVMOptions", // there is on ObjectAlignmentInBytes in 32 bit builds "-XX:ObjectAlignmentInBytes=8", "-version"); OutputAnalyzer output = new OutputAnalyzer(pb.start()); checkSmallTables(output, (cardsShouldUseLargePages ? largePageSize : smallPageSize)); checkBitmaps(output, (bitmapShouldUseLargePages ? largePageSize : smallPageSize)); output.shouldHaveExitValue(0); // Test with large page disabled. pb = ProcessTools.createJavaProcessBuilder("-XX:+UseG1GC", "-XX:G1HeapRegionSize=" + HEAP_REGION_SIZE, "-Xms" + 10 * HEAP_REGION_SIZE, "-Xmx" + heapsize, "-XX:+TracePageSizes", "-XX:-UseLargePages", "-XX:+IgnoreUnrecognizedVMOptions", // there is on ObjectAlignmentInBytes in 32 bit builds "-XX:ObjectAlignmentInBytes=8", "-version"); output = new OutputAnalyzer(pb.start()); checkSmallTables(output, smallPageSize); checkBitmaps(output, smallPageSize); output.shouldHaveExitValue(0); } public static void main(String[] args) throws Exception { if (!Platform.isDebugBuild()) { System.out.println("Skip tests on non-debug builds because the required option TracePageSizes is a debug-only option."); return; } WhiteBox wb = WhiteBox.getWhiteBox(); smallPageSize = wb.getVMPageSize(); largePageSize = wb.getVMLargePageSize(); if (largePageSize == 0) { System.out.println("Skip tests because large page support does not seem to be available on this platform."); return; } // To get large pages for the card table etc. we need at least a 1G heap (with 4k page size). // 32 bit systems will have problems reserving such an amount of contiguous space, so skip the // test there. if (!Platform.is32bit()) { // Size that a single card covers. final int cardSize = 512; final long heapSizeForCardTableUsingLargePages = largePageSize * cardSize; testVM(heapSizeForCardTableUsingLargePages, true, true); testVM(heapSizeForCardTableUsingLargePages + HEAP_REGION_SIZE, true, true); testVM(heapSizeForCardTableUsingLargePages - HEAP_REGION_SIZE, false, true); } // Minimum heap requirement to get large pages for bitmaps is 128M heap. This seems okay to test // everywhere. final int bitmapTranslationFactor = 8 * 8; // ObjectAlignmentInBytes * BitsPerByte final long heapSizeForBitmapUsingLargePages = largePageSize * bitmapTranslationFactor; testVM(heapSizeForBitmapUsingLargePages, false, true); testVM(heapSizeForBitmapUsingLargePages + HEAP_REGION_SIZE, false, true); testVM(heapSizeForBitmapUsingLargePages - HEAP_REGION_SIZE, false, false); } }