31 * @bug 4892507
32 * @summary Basic Test for MemoryPool.resetPeakUsage()
33 * @author Mandy Chung
34 *
35 * @requires vm.opt.ExplicitGCInvokesConcurrent != "true"
36 * @requires vm.opt.DisableExplicitGC != "true"
37 * @library /lib/testlibrary/ /test/lib
38 * @modules jdk.management
39 *
40 * @build jdk.testlibrary.* ResetPeakMemoryUsage MemoryUtil RunUtil
41 * @build sun.hotspot.WhiteBox
42 * @run driver ClassFileInstaller sun.hotspot.WhiteBox sun.hotspot.WhiteBox$WhiteBoxPermission
43 * @run main/othervm -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -Xbootclasspath/a:. ResetPeakMemoryUsage
44 */
45
46 import java.lang.management.*;
47 import java.lang.ref.WeakReference;
48 import java.util.*;
49
50 import sun.hotspot.code.Compiler;
51
52 public class ResetPeakMemoryUsage {
53 private static MemoryMXBean mbean = ManagementFactory.getMemoryMXBean();
54 // make public so that it can't be optimized away easily
55 public static Object[] obj;
56
57 /**
58 * Run the test multiple times with different GC versions.
59 * First with default command line specified by the framework.
60 * Then with all GC versions specified by the test.
61 */
62 public static void main(String a[]) throws Throwable {
63 final String main = "ResetPeakMemoryUsage$TestMain";
64 final String ms = "-Xms256m";
65 final String mn = "-Xmn8m";
66 if (!Compiler.isGraalEnabled()) { // Graal does not support CMS
67 RunUtil.runTestClearGcOpts(main, ms, mn, "-XX:+UseConcMarkSweepGC");
68 }
69 RunUtil.runTestClearGcOpts(main, ms, mn, "-XX:+UseParallelGC");
70 RunUtil.runTestClearGcOpts(main, ms, mn, "-XX:+UseG1GC", "-XX:G1HeapRegionSize=1m");
71 RunUtil.runTestClearGcOpts(main, ms, mn, "-XX:+UseSerialGC",
72 "-XX:MarkSweepAlwaysCompactCount=1");
73 }
74
75 private static class TestMain {
76 public static void main(String[] argv) {
77 List pools = ManagementFactory.getMemoryPoolMXBeans();
78 ListIterator iter = pools.listIterator();
79 boolean found = false;
80 while (iter.hasNext()) {
81 MemoryPoolMXBean p = (MemoryPoolMXBean) iter.next();
82 // only check heap pools that support usage threshold
83 // this is typically only the old generation space
84 // since the other spaces are expected to get filled up
85 if (p.getType() == MemoryType.HEAP &&
86 p.isUsageThresholdSupported())
87 {
88 found = true;
89 testPool(p);
90 }
91 }
92 if (!found) {
93 throw new RuntimeException("No heap pool found");
94 }
95 }
96 }
97
98 private static void testPool(MemoryPoolMXBean mpool) {
99 System.out.println("Selected memory pool: ");
100 MemoryUtil.printMemoryPool(mpool);
101
102 MemoryUsage usage0 = mpool.getUsage();
103 MemoryUsage peak0 = mpool.getPeakUsage();
104
105 // use a size that is larger than the young generation and G1 regions
106 // to force the array into the old gen
107 int largeArraySize = 9 * 1000 * 1000;
108
109 System.out.println("Before big object array (of size "+largeArraySize+") is allocated: ");
110 printMemoryUsage(usage0, peak0);
111
114
115 MemoryUsage usage1 = mpool.getUsage();
116 MemoryUsage peak1 = mpool.getPeakUsage();
117 System.out.println("After the object is allocated: ");
118 printMemoryUsage(usage1, peak1);
119
120 if (usage1.getUsed() <= usage0.getUsed()) {
121 throw new RuntimeException(
122 formatSize("Before allocation: used", usage0.getUsed()) +
123 " expected to be < " +
124 formatSize("After allocation: used", usage1.getUsed()));
125 }
126
127 if (peak1.getUsed() <= peak0.getUsed()) {
128 throw new RuntimeException(
129 formatSize("Before allocation: peak", peak0.getUsed()) +
130 " expected to be < " +
131 formatSize("After allocation: peak", peak1.getUsed()));
132 }
133
134
135 // The object is now garbage and do a GC
136 // memory usage should drop
137 obj = null;
138
139 //This will cause sure shot GC unlike Runtime.gc() invoked by mbean.gc()
140 while(weakRef.get() != null) {
141 mbean.gc();
142 }
143
144 MemoryUsage usage2 = mpool.getUsage();
145 MemoryUsage peak2 = mpool.getPeakUsage();
146 System.out.println("After GC: ");
147 printMemoryUsage(usage2, peak2);
148
149 if (usage2.getUsed() >= usage1.getUsed()) {
150 throw new RuntimeException(
151 formatSize("Before GC: used", usage1.getUsed()) + " " +
152 " expected to be > " +
153 formatSize("After GC: used", usage2.getUsed()));
154 }
155
156 mpool.resetPeakUsage();
157
158 MemoryUsage usage3 = mpool.getUsage();
159 MemoryUsage peak3 = mpool.getPeakUsage();
160 System.out.println("After resetPeakUsage: ");
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31 * @bug 4892507
32 * @summary Basic Test for MemoryPool.resetPeakUsage()
33 * @author Mandy Chung
34 *
35 * @requires vm.opt.ExplicitGCInvokesConcurrent != "true"
36 * @requires vm.opt.DisableExplicitGC != "true"
37 * @library /lib/testlibrary/ /test/lib
38 * @modules jdk.management
39 *
40 * @build jdk.testlibrary.* ResetPeakMemoryUsage MemoryUtil RunUtil
41 * @build sun.hotspot.WhiteBox
42 * @run driver ClassFileInstaller sun.hotspot.WhiteBox sun.hotspot.WhiteBox$WhiteBoxPermission
43 * @run main/othervm -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -Xbootclasspath/a:. ResetPeakMemoryUsage
44 */
45
46 import java.lang.management.*;
47 import java.lang.ref.WeakReference;
48 import java.util.*;
49
50 import sun.hotspot.code.Compiler;
51 import sun.hotspot.WhiteBox;
52
53 public class ResetPeakMemoryUsage {
54 private static MemoryMXBean mbean = ManagementFactory.getMemoryMXBean();
55 // make public so that it can't be optimized away easily
56 public static Object[] obj;
57
58 /**
59 * Run the test multiple times with different GC versions.
60 * First with default command line specified by the framework.
61 * Then with all GC versions specified by the test.
62 */
63 public static void main(String a[]) throws Throwable {
64 final String main = "ResetPeakMemoryUsage$TestMain";
65 final String ms = "-Xms256m";
66 final String mn = "-Xmn8m";
67 if (!Compiler.isGraalEnabled()) { // Graal does not support CMS
68 RunUtil.runTestClearGcOpts(main, ms, mn, "-XX:+UseConcMarkSweepGC");
69 }
70 RunUtil.runTestClearGcOpts(main, ms, mn, "-XX:+UseParallelGC");
71 RunUtil.runTestClearGcOpts(main, ms, mn, "-XX:+UseG1GC", "-XX:-G1UseLegacyMonitoring",
72 "-XX:G1HeapRegionSize=1m");
73 RunUtil.runTestClearGcOpts(main, ms, mn, "-XX:+UseG1GC", "-XX:+G1UseLegacyMonitoring",
74 "-XX:G1HeapRegionSize=1m");
75 RunUtil.runTestClearGcOpts(main, ms, mn, "-XX:+UseSerialGC",
76 "-XX:MarkSweepAlwaysCompactCount=1");
77 }
78
79 private static class TestMain {
80 public static void main(String[] argv) {
81 List pools = ManagementFactory.getMemoryPoolMXBeans();
82 ListIterator iter = pools.listIterator();
83 boolean found = false;
84 while (iter.hasNext()) {
85 MemoryPoolMXBean p = (MemoryPoolMXBean) iter.next();
86 // Only check heap pools that support a usage threshold.
87 // This is typically only the old generation space
88 // since the other spaces are expected to get filled up.
89 if (p.getType() == MemoryType.HEAP &&
90 p.isUsageThresholdSupported()) {
91 // In all collectors except G1, only the old generation supports a
92 // usage threshold. The G1 legacy mode "G1 Old Gen" also does. In
93 // G1 default mode, both the old space ("G1 Old Space": it's not
94 // really a generation in the non-G1 collector sense) and the
95 // humongous space ("G1 Humongous Space"), support a usage threshold.
96 // So, the following condition is true for all non-G1 old generations,
97 // for the G1 legacy old gen, and for the G1 default humongous space.
98 // It is not true for the G1 default old gen.
99 //
100 // We're allocating humongous objects in this test, so the G1 default
101 // mode "G1 Old Space" occupancy doesn't change, because humongous
102 // objects are allocated in the "G1 Humongous Space". If we allowed
103 // the G1 default mode "G1 Old Space", notification would never
104 // happen because no objects are allocated there.
105 if (!p.getName().equals("G1 Old Space")) {
106 found = true;
107 testPool(p);
108 }
109 }
110 }
111 if (!found) {
112 throw new RuntimeException("No heap pool found");
113 }
114 }
115 }
116
117 private static void testPool(MemoryPoolMXBean mpool) {
118 System.out.println("Selected memory pool: ");
119 MemoryUtil.printMemoryPool(mpool);
120
121 MemoryUsage usage0 = mpool.getUsage();
122 MemoryUsage peak0 = mpool.getPeakUsage();
123
124 // use a size that is larger than the young generation and G1 regions
125 // to force the array into the old gen
126 int largeArraySize = 9 * 1000 * 1000;
127
128 System.out.println("Before big object array (of size "+largeArraySize+") is allocated: ");
129 printMemoryUsage(usage0, peak0);
130
133
134 MemoryUsage usage1 = mpool.getUsage();
135 MemoryUsage peak1 = mpool.getPeakUsage();
136 System.out.println("After the object is allocated: ");
137 printMemoryUsage(usage1, peak1);
138
139 if (usage1.getUsed() <= usage0.getUsed()) {
140 throw new RuntimeException(
141 formatSize("Before allocation: used", usage0.getUsed()) +
142 " expected to be < " +
143 formatSize("After allocation: used", usage1.getUsed()));
144 }
145
146 if (peak1.getUsed() <= peak0.getUsed()) {
147 throw new RuntimeException(
148 formatSize("Before allocation: peak", peak0.getUsed()) +
149 " expected to be < " +
150 formatSize("After allocation: peak", peak1.getUsed()));
151 }
152
153 // The object is now garbage and do a GC. Memory usage should drop.
154 obj = null;
155
156 // This will cause a sure shot GC unlike Runtime.gc() invoked by mbean.gc()
157 while (weakRef.get() != null) {
158 mbean.gc();
159 }
160
161 MemoryUsage usage2 = mpool.getUsage();
162 MemoryUsage peak2 = mpool.getPeakUsage();
163 System.out.println("After GC: ");
164 printMemoryUsage(usage2, peak2);
165
166 if (usage2.getUsed() >= usage1.getUsed()) {
167 throw new RuntimeException(
168 formatSize("Before GC: used", usage1.getUsed()) + " " +
169 " expected to be > " +
170 formatSize("After GC: used", usage2.getUsed()));
171 }
172
173 mpool.resetPeakUsage();
174
175 MemoryUsage usage3 = mpool.getUsage();
176 MemoryUsage peak3 = mpool.getPeakUsage();
177 System.out.println("After resetPeakUsage: ");
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