246 lines
9.5 KiB
Java
246 lines
9.5 KiB
Java
/*
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* Copyright (c) 2019, 2023, 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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package gc.g1.numa;
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/**
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* @test TestG1NUMATouchRegions
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* @summary Ensure the bottom of the given heap regions are properly touched with requested NUMA id.
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* @requires vm.gc.G1
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* @requires os.family == "linux"
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* @library /test/lib
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* @modules java.base/jdk.internal.misc
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* java.management
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* @build jdk.test.whitebox.WhiteBox
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* @run driver jdk.test.lib.helpers.ClassFileInstaller jdk.test.whitebox.WhiteBox
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* @run main/othervm -XX:+UseG1GC -Xbootclasspath/a:. -XX:+UseNUMA
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* -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI
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* gc.g1.numa.TestG1NUMATouchRegions
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*/
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import java.util.LinkedList;
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import jdk.test.lib.process.OutputAnalyzer;
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import jdk.test.lib.process.ProcessTools;
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import jdk.test.whitebox.WhiteBox;
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public class TestG1NUMATouchRegions {
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enum NUMASupportStatus {
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NOT_CHECKED,
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SUPPORT,
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NOT_SUPPORT
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};
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static int G1HeapRegionSize1MB = 1;
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static int G1HeapRegionSize8MB = 8;
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static NUMASupportStatus status = NUMASupportStatus.NOT_CHECKED;
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public static void main(String[] args) throws Exception {
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// 1. Page size < G1HeapRegionSize
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// Test default page with 1MB heap region size
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testMemoryTouch("-XX:-UseLargePages", G1HeapRegionSize1MB);
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// 2. Page size > G1HeapRegionSize
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// Test large page with 1MB heap region size.
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testMemoryTouch("-XX:+UseLargePages", G1HeapRegionSize1MB);
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// 3. Page size < G1HeapRegionSize
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// Test large page with 8MB heap region size.
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testMemoryTouch("-XX:+UseLargePages", G1HeapRegionSize8MB);
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}
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// On Linux, always UseNUMA is enabled if there is multiple active numa nodes.
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static NUMASupportStatus checkNUMAIsEnabled(OutputAnalyzer output) {
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boolean supportNUMA = Boolean.parseBoolean(output.firstMatch("\\bUseNUMA\\b.*?=.*?([a-z]+)", 1));
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System.out.println("supportNUMA=" + supportNUMA);
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return supportNUMA ? NUMASupportStatus.SUPPORT : NUMASupportStatus.NOT_SUPPORT;
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}
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static long parseSizeString(String size) {
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long multiplier = 1;
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if (size.endsWith("B")) {
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multiplier = 1;
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} else if (size.endsWith("K")) {
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multiplier = 1024;
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} else if (size.endsWith("M")) {
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multiplier = 1024 * 1024;
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} else if (size.endsWith("G")) {
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multiplier = 1024 * 1024 * 1024;
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} else {
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throw new IllegalArgumentException("Expected memory string '" + size + "'to end with either of: B, K, M, G");
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}
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long longSize = Long.parseUnsignedLong(size.substring(0, size.length() - 1));
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return longSize * multiplier;
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}
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static long heapPageSize(OutputAnalyzer output) {
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String HeapPageSizePattern = "Heap: .* page_size=(\\d+[BKMG])";
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String str = output.firstMatch(HeapPageSizePattern, 1);
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if (str == null) {
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output.reportDiagnosticSummary();
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throw new RuntimeException("Match from '" + HeapPageSizePattern + "' got 'null'");
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}
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return parseSizeString(str);
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}
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// 1. -UseLargePages: default page, page size < G1HeapRegionSize
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// +UseLargePages: large page size <= G1HeapRegionSize
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//
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// Each 'int' represents a numa id of single G1HeapRegion (bottom page).
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// e.g. 1MB heap region, 2MB page size and 2 NUMA nodes system
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// Check the first set(2 regions)
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// 0| ...omitted..| 0
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// 1| ...omitted..| 1
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static void checkCase1Pattern(OutputAnalyzer output, int index, long g1HeapRegionSize, long actualPageSize, int[] memoryNodeIds) throws Exception {
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StringBuilder sb = new StringBuilder();
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// Append index which means heap region index.
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sb.append(String.format("%6d", index));
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sb.append("| .* | ");
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// Append page node id.
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sb.append(memoryNodeIds[index]);
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output.shouldMatch(sb.toString());
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}
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// 3. +UseLargePages: large page size > G1HeapRegionSize
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//
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// As a OS page is consist of multiple heap regions, log also should be
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// printed multiple times for same numa id.
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// e.g. 1MB heap region, 2MB page size and 2 NUMA nodes system
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// Check the first set(4 regions)
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// 0| ...omitted..| 0
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// 1| ...omitted..| 0
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// 2| ...omitted..| 1
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// 3| ...omitted..| 1
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static void checkCase2Pattern(OutputAnalyzer output, int index, long g1HeapRegionSize, long actualPageSize, int[] memoryNodeIds) throws Exception {
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StringBuilder sb = new StringBuilder();
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// Append page range.
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int lines_to_print = (int)(actualPageSize / g1HeapRegionSize);
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for (int i = 0; i < lines_to_print; i++) {
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// Append index which means heap region index.
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sb.append(String.format("%6d", index * lines_to_print + i));
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sb.append("| .* | ");
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// Append page node id.
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sb.append(memoryNodeIds[index]);
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output.shouldMatch(sb.toString());
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sb.setLength(0);
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}
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}
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static void checkNUMALog(OutputAnalyzer output, int regionSizeInMB) throws Exception {
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WhiteBox wb = WhiteBox.getWhiteBox();
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long g1HeapRegionSize = regionSizeInMB * 1024 * 1024;
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long actualPageSize = heapPageSize(output);
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long defaultPageSize = (long)wb.getVMPageSize();
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int memoryNodeCount = wb.g1ActiveMemoryNodeCount();
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int[] memoryNodeIds = wb.g1MemoryNodeIds();
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System.out.println("node count=" + memoryNodeCount + ", actualPageSize=" + actualPageSize);
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// Check for the first set of active numa nodes.
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for (int index = 0; index < memoryNodeCount; index++) {
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if (actualPageSize <= defaultPageSize) {
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checkCase1Pattern(output, index, g1HeapRegionSize, actualPageSize, memoryNodeIds);
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} else {
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checkCase2Pattern(output, index, g1HeapRegionSize, actualPageSize, memoryNodeIds);
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}
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}
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}
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static void testMemoryTouch(String largePagesSetting, int regionSizeInMB) throws Exception {
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// Skip testing with message.
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if (status == NUMASupportStatus.NOT_SUPPORT) {
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System.out.println("NUMA is not supported");
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return;
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}
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OutputAnalyzer output = ProcessTools.executeLimitedTestJava(
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"-Xbootclasspath/a:.",
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"-Xlog:pagesize,gc+heap+region=trace",
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"-XX:+UseG1GC",
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"-Xmx128m",
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"-Xms128m",
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"-XX:+UnlockDiagnosticVMOptions",
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"-XX:+WhiteBoxAPI",
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"-XX:+PrintFlagsFinal",
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"-XX:+UseNUMA",
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"-XX:+AlwaysPreTouch",
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largePagesSetting,
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"-XX:G1HeapRegionSize=" + regionSizeInMB + "m",
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GCTest.class.getName());
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// Check NUMA availability.
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if (status == NUMASupportStatus.NOT_CHECKED) {
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status = checkNUMAIsEnabled(output);
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}
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if (status == NUMASupportStatus.SUPPORT) {
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checkNUMALog(output, regionSizeInMB);
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} else {
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// Exit with message for the first test.
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System.out.println("NUMA is not supported");
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}
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}
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static class GCTest {
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public static final int M = 1024*1024;
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public static LinkedList<Object> garbageList = new LinkedList<Object>();
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// A large object referenced by a static.
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static int[] filler = new int[10 * M];
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public static void genGarbage() {
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for (int i = 0; i < 32*1024; i++) {
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garbageList.add(new int[100]);
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}
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garbageList.clear();
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}
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public static void main(String[] args) {
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int[] large = new int[M];
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Object ref = large;
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System.out.println("Creating garbage");
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for (int i = 0; i < 100; i++) {
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// A large object that will be reclaimed eagerly.
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large = new int[6*M];
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genGarbage();
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// Make sure that the compiler cannot completely remove
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// the allocation of the large object until here.
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System.out.println(large);
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}
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// Keep the reference to the first object alive.
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System.out.println(ref);
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System.out.println("Done");
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}
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}
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}
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