1 /*
2 * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24 /*
25 * @test TestPLABPromotion
26 * @bug 8141278
27 * @summary Test PLAB promotion
28 * @requires vm.gc=="G1" | vm.gc=="null"
29 * @requires vm.opt.FlightRecorder != true
30 * @library /testlibrary /../../test/lib /
31 * @modules java.management
32 * @build ClassFileInstaller
33 * sun.hotspot.WhiteBox
34 * gc.g1.plab.lib.MemoryConsumer
35 * gc.g1.plab.lib.LogParser
36 * gc.g1.plab.lib.AppPLABPromotion
37 * @run main ClassFileInstaller sun.hotspot.WhiteBox
38 * sun.hotspot.WhiteBox$WhiteBoxPermission
39 * @run main/timeout=240 gc.g1.plab.TestPLABPromotion
40 */
41 package gc.g1.plab;
42
43 import java.util.List;
44 import java.util.Map;
45 import java.util.Arrays;
46 import java.io.PrintStream;
47
48 import gc.g1.plab.lib.AppPLABPromotion;
49 import gc.g1.plab.lib.LogParser;
50 import gc.g1.plab.lib.PLABUtils;
51
52 import jdk.test.lib.OutputAnalyzer;
53 import jdk.test.lib.ProcessTools;
54 import jdk.test.lib.Platform;
55
56 /**
57 * Test checks PLAB promotion of different size objects.
58 */
59 public class TestPLABPromotion {
60
61 // GC ID with survivor PLAB statistics
62 private final static long GC_ID_SURVIVOR_STATS = 1l;
63 // GC ID with old PLAB statistics
64 private final static long GC_ID_OLD_STATS = 2l;
65
66 // Allowable difference for memory consumption (percentage)
67 private final static long MEM_DIFFERENCE_PCT = 5;
68
69 private static final int PLAB_SIZE_SMALL = 1024;
70 private static final int PLAB_SIZE_MEDIUM = 4096;
71 private static final int PLAB_SIZE_HIGH = 65536;
72 private static final int OBJECT_SIZE_SMALL = 10;
73 private static final int OBJECT_SIZE_MEDIUM = 100;
74 private static final int OBJECT_SIZE_HIGH = 1000;
75 private static final int GC_NUM_SMALL = 1;
76 private static final int GC_NUM_MEDIUM = 3;
77 private static final int GC_NUM_HIGH = 7;
78 private static final int WASTE_PCT_SMALL = 10;
79 private static final int WASTE_PCT_MEDIUM = 20;
80 private static final int WASTE_PCT_HIGH = 30;
81 private static final int YOUNG_SIZE_LOW = 16;
82 private static final int YOUNG_SIZE_HIGH = 64;
83 private static final boolean PLAB_FIXED = true;
84 private static final boolean PLAB_DYNAMIC = false;
85
86 private final static TestCase[] TEST_CASES = {
87 // Test cases for unreachable object, PLAB size is fixed
88 new TestCase(WASTE_PCT_SMALL, PLAB_SIZE_SMALL, OBJECT_SIZE_MEDIUM, GC_NUM_SMALL, YOUNG_SIZE_LOW, PLAB_FIXED, false, false),
89 new TestCase(WASTE_PCT_HIGH, PLAB_SIZE_MEDIUM, OBJECT_SIZE_SMALL, GC_NUM_HIGH, YOUNG_SIZE_HIGH, PLAB_FIXED, false, false),
90 // Test cases for reachable objects, PLAB size is fixed
91 new TestCase(WASTE_PCT_SMALL, PLAB_SIZE_SMALL, OBJECT_SIZE_SMALL, GC_NUM_HIGH, YOUNG_SIZE_HIGH, PLAB_FIXED, true, true),
92 new TestCase(WASTE_PCT_SMALL, PLAB_SIZE_MEDIUM, OBJECT_SIZE_MEDIUM, GC_NUM_SMALL, YOUNG_SIZE_LOW, PLAB_FIXED, true, true),
93 new TestCase(WASTE_PCT_SMALL, PLAB_SIZE_SMALL, OBJECT_SIZE_HIGH, GC_NUM_MEDIUM, YOUNG_SIZE_LOW, PLAB_FIXED, true, false),
94 new TestCase(WASTE_PCT_MEDIUM, PLAB_SIZE_HIGH, OBJECT_SIZE_SMALL, GC_NUM_HIGH, YOUNG_SIZE_HIGH, PLAB_FIXED, true, true),
95 new TestCase(WASTE_PCT_MEDIUM, PLAB_SIZE_SMALL, OBJECT_SIZE_MEDIUM, GC_NUM_SMALL, YOUNG_SIZE_LOW, PLAB_FIXED, true, true),
96 new TestCase(WASTE_PCT_MEDIUM, PLAB_SIZE_MEDIUM, OBJECT_SIZE_HIGH, GC_NUM_MEDIUM, YOUNG_SIZE_LOW, PLAB_FIXED, true, true),
97 new TestCase(WASTE_PCT_HIGH, PLAB_SIZE_SMALL, OBJECT_SIZE_SMALL, GC_NUM_HIGH, YOUNG_SIZE_HIGH, PLAB_FIXED, true, true),
98 new TestCase(WASTE_PCT_HIGH, PLAB_SIZE_HIGH, OBJECT_SIZE_MEDIUM, GC_NUM_SMALL, YOUNG_SIZE_LOW, PLAB_FIXED, true, true),
99 new TestCase(WASTE_PCT_HIGH, PLAB_SIZE_SMALL, OBJECT_SIZE_HIGH, GC_NUM_MEDIUM, YOUNG_SIZE_HIGH, PLAB_FIXED, true, false),
100 // Test cases for unreachable object, PLAB size is not fixed
101 new TestCase(WASTE_PCT_MEDIUM, PLAB_SIZE_MEDIUM, OBJECT_SIZE_SMALL, GC_NUM_HIGH, YOUNG_SIZE_LOW, PLAB_DYNAMIC, false, false),
102 // Test cases for reachable objects, PLAB size is not fixed
103 new TestCase(WASTE_PCT_SMALL, PLAB_SIZE_HIGH, OBJECT_SIZE_SMALL, GC_NUM_HIGH, YOUNG_SIZE_HIGH, PLAB_DYNAMIC, true, true),
104 new TestCase(WASTE_PCT_MEDIUM, PLAB_SIZE_MEDIUM, OBJECT_SIZE_SMALL, GC_NUM_SMALL, YOUNG_SIZE_LOW, PLAB_DYNAMIC, true, true),
105 new TestCase(WASTE_PCT_SMALL, PLAB_SIZE_MEDIUM, OBJECT_SIZE_HIGH, GC_NUM_HIGH, YOUNG_SIZE_HIGH, PLAB_DYNAMIC, true, false),
106 new TestCase(WASTE_PCT_MEDIUM, PLAB_SIZE_SMALL, OBJECT_SIZE_MEDIUM, GC_NUM_MEDIUM, YOUNG_SIZE_LOW, PLAB_DYNAMIC, true, true),
107 new TestCase(WASTE_PCT_HIGH, PLAB_SIZE_HIGH, OBJECT_SIZE_MEDIUM, GC_NUM_SMALL, YOUNG_SIZE_HIGH, PLAB_DYNAMIC, true, true),
108 new TestCase(WASTE_PCT_HIGH, PLAB_SIZE_HIGH, OBJECT_SIZE_SMALL, GC_NUM_HIGH, YOUNG_SIZE_LOW, PLAB_DYNAMIC, true, true)
109 };
110
111 public static void main(String[] args) throws Throwable {
112
113 for (TestCase testCase : TEST_CASES) {
114 // What we going to check.
115 testCase.print(System.out);
116 List<String> options = PLABUtils.prepareOptions(testCase.toOptions());
117 options.add(AppPLABPromotion.class.getName());
118 OutputAnalyzer out = ProcessTools.executeTestJvm(options.toArray(new String[options.size()]));
119 if (out.getExitValue() != 0) {
120 System.out.println(out.getOutput());
121 throw new RuntimeException("Expect exit code 0.");
122 }
123 checkResults(out.getOutput(), testCase);
124 }
125 }
126
127 private static void checkResults(String output, TestCase testCase) {
128 long plabAllocatedSurvivor;
129 long directAllocatedSurvivor;
130 long plabAllocatedOld;
131 long directAllocatedOld;
132 long memAllocated = testCase.getMemToFill();
133 long wordSize = Platform.is32bit() ? 4l : 8l;
134 LogParser logParser = new LogParser(output);
135
136 Map<String, Long> survivorStats = getPlabStats(logParser, LogParser.ReportType.SURVIVOR_STATS, GC_ID_SURVIVOR_STATS);
137 Map<String, Long> oldStats = getPlabStats(logParser, LogParser.ReportType.OLD_STATS, GC_ID_OLD_STATS);
138
139 plabAllocatedSurvivor = wordSize * survivorStats.get("used");
140 directAllocatedSurvivor = wordSize * survivorStats.get("direct_allocated");
141 plabAllocatedOld = wordSize * oldStats.get("used");
142 directAllocatedOld = wordSize * oldStats.get("direct_allocated");
143
144 System.out.printf("Survivor PLAB allocated:%17d Direct allocated: %17d Mem consumed:%17d%n", plabAllocatedSurvivor, directAllocatedSurvivor, memAllocated);
145 System.out.printf("Old PLAB allocated:%17d Direct allocated: %17d Mem consumed:%17d%n", plabAllocatedOld, directAllocatedOld, memAllocated);
146
147 // Unreachable objects case
148 if (testCase.isDeadObjectCase()) {
149 // No dead objects should be promoted
150 if (!(checkRatio(plabAllocatedSurvivor, memAllocated) && checkRatio(directAllocatedSurvivor, memAllocated))) {
151 System.out.println(output);
152 throw new RuntimeException("Unreachable objects should not be allocated using PLAB or direct allocated to Survivor");
153 }
154 if (!(checkRatio(plabAllocatedOld, memAllocated) && checkRatio(directAllocatedOld, memAllocated))) {
155 System.out.println(output);
156 throw new RuntimeException("Unreachable objects should not be allocated using PLAB or direct allocated to Old");
157 }
158 } else {
159 // Live objects case
160 if (testCase.isPromotedByPLAB()) {
161 // All live small objects should be promoted using PLAB
162 if (!checkDifferenceRatio(plabAllocatedSurvivor, memAllocated)) {
163 System.out.println(output);
164 throw new RuntimeException("Expect that Survivor PLAB allocation are similar to all mem consumed");
165 }
166 if (!checkDifferenceRatio(plabAllocatedOld, memAllocated)) {
167 System.out.println(output);
168 throw new RuntimeException("Expect that Old PLAB allocation are similar to all mem consumed");
169 }
170 } else {
171 // All big objects should be directly allocated
172 if (!checkDifferenceRatio(directAllocatedSurvivor, memAllocated)) {
173 System.out.println(output);
174 throw new RuntimeException("Test fails. Expect that Survivor direct allocation are similar to all mem consumed");
175 }
176 if (!checkDifferenceRatio(directAllocatedOld, memAllocated)) {
177 System.out.println(output);
178 throw new RuntimeException("Test fails. Expect that Old direct allocation are similar to all mem consumed");
179 }
180 }
181
182 // All promoted objects size should be similar to all consumed memory
183 if (!checkDifferenceRatio(plabAllocatedSurvivor + directAllocatedSurvivor, memAllocated)) {
184 System.out.println(output);
185 throw new RuntimeException("Test fails. Expect that Survivor gen total allocation are similar to all mem consumed");
186 }
187 if (!checkDifferenceRatio(plabAllocatedOld + directAllocatedOld, memAllocated)) {
188 System.out.println(output);
189 throw new RuntimeException("Test fails. Expect that Old gen total allocation are similar to all mem consumed");
190 }
191 }
192 System.out.println("Test passed!");
193 }
194
195 private static boolean checkRatio(long checkedValue, long controlValue) {
196 return (Math.abs(checkedValue) / controlValue) * 100L < MEM_DIFFERENCE_PCT;
197 }
198
199 private static boolean checkDifferenceRatio(long checkedValue, long controlValue) {
200 return (Math.abs(checkedValue - controlValue) / controlValue) * 100L < MEM_DIFFERENCE_PCT;
201 }
202
203 private static Map<String, Long> getPlabStats(LogParser logParser, LogParser.ReportType type, long gc_id) {
204
205 Map<String, Long> survivorStats = logParser.getEntries()
206 .get(gc_id)
207 .get(type);
208 return survivorStats;
209 }
210
211 /**
212 * Description of one test case.
213 */
214 private static class TestCase {
215
216 private final int wastePct;
217 private final int plabSize;
218 private final int chunkSize;
219 private final int parGCThreads;
220 private final int edenSize;
221 private final boolean plabIsFixed;
222 private final boolean objectsAreReachable;
223 private final boolean promotedByPLAB;
224
225 /**
226 * @param wastePct
227 * ParallelGCBufferWastePct
228 * @param plabSize
229 * -XX:OldPLABSize and -XX:YoungPLABSize
230 * @param chunkSize
231 * requested object size for memory consumption
232 * @param parGCThreads
233 * -XX:ParallelGCThreads
234 * @param edenSize
235 * NewSize and MaxNewSize
236 * @param plabIsFixed
237 * Use dynamic PLAB or fixed size PLAB
238 * @param objectsAreReachable
239 * true - allocate live objects
240 * false - allocate unreachable objects
241 * @param promotedByPLAB
242 * true - we expect to see PLAB allocation during promotion
243 * false - objects will be directly allocated during promotion
244 */
245 public TestCase(int wastePct,
246 int plabSize,
247 int chunkSize,
248 int parGCThreads,
249 int edenSize,
250 boolean plabIsFixed,
251 boolean objectsAreReachable,
252 boolean promotedByPLAB
253 ) {
254 if (wastePct == 0 || plabSize == 0 || chunkSize == 0 || parGCThreads == 0 || edenSize == 0) {
255 throw new IllegalArgumentException("Parameters should not be 0");
256 }
257 this.wastePct = wastePct;
258 this.plabSize = plabSize;
259 this.chunkSize = chunkSize;
260 this.parGCThreads = parGCThreads;
261 this.edenSize = edenSize;
262 this.plabIsFixed = plabIsFixed;
263 this.objectsAreReachable = objectsAreReachable;
264 this.promotedByPLAB = promotedByPLAB;
265 }
266
267 /**
268 * Convert current TestCase to List of options.
269 * Assume test will fill half of existed eden.
270 *
271 * @return
272 * List of options
273 */
274 public List<String> toOptions() {
275 return Arrays.asList("-XX:ParallelGCThreads=" + parGCThreads,
276 "-XX:ParallelGCBufferWastePct=" + wastePct,
277 "-XX:OldPLABSize=" + plabSize,
278 "-XX:YoungPLABSize=" + plabSize,
279 "-XX:" + (plabIsFixed ? "-" : "+") + "ResizePLAB",
280 "-Dchunk.size=" + chunkSize,
281 "-Dreachable=" + objectsAreReachable,
282 "-XX:NewSize=" + edenSize + "m",
283 "-XX:MaxNewSize=" + edenSize + "m",
284 "-Dmem.to.fill=" + getMemToFill()
285 );
286 }
287
288 /**
289 * Print details about test case.
290 */
291 public void print(PrintStream out) {
292 boolean expectPLABAllocation = promotedByPLAB && objectsAreReachable;
293 boolean expectDirectAllocation = (!promotedByPLAB) && objectsAreReachable;
294
295 out.println("Test case details:");
296 out.println(" Young gen size : " + edenSize + "M");
297 out.println(" Predefined PLAB size : " + plabSize);
298 out.println(" Parallel GC buffer waste pct : " + wastePct);
299 out.println(" Chunk size : " + chunkSize);
300 out.println(" Parallel GC threads : " + parGCThreads);
301 out.println(" Objects are created : " + (objectsAreReachable ? "reachable" : "unreachable"));
302 out.println(" PLAB size is fixed: " + (plabIsFixed ? "yes" : "no"));
303 out.println("Test expectations:");
304 out.println(" PLAB allocation : " + (expectPLABAllocation ? "expected" : "unexpected"));
305 out.println(" Direct allocation : " + (expectDirectAllocation ? "expected" : "unexpected"));
306 }
307
308 /**
309 * @return
310 * true if we expect PLAB allocation
311 * false if no
312 */
313 public boolean isPromotedByPLAB() {
314 return promotedByPLAB;
315 }
316
317 /**
318 * @return
319 * true if it is test case for unreachable objects
320 * false for live objects
321 */
322 public boolean isDeadObjectCase() {
323 return !objectsAreReachable;
324 }
325
326 /**
327 * Returns amount of memory to fill
328 *
329 * @return amount of memory
330 */
331 public long getMemToFill() {
332 return (long) (edenSize) * 1024l * 1024l / 2;
333 }
334 }
335 }