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test/hotspot/jtreg/gc/z/TestGarbageCollectorMXBean.java
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@@ -32,17 +32,24 @@
import java.lang.management.ManagementFactory;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.atomic.AtomicLong;
import javax.management.Notification;
-import javax.management.NotificationBroadcaster;
+import javax.management.NotificationEmitter;
import javax.management.NotificationListener;
import javax.management.openmbean.CompositeData;
import com.sun.management.GarbageCollectionNotificationInfo;
public class TestGarbageCollectorMXBean {
+ private static final long startTime = System.nanoTime();
+
+ private static void log(String msg) {
+ final String elapsedSeconds = String.format("%.3fs", (System.nanoTime() - startTime) / 1_000_000_000.0);
+ System.out.println("[" + elapsedSeconds + "] (" + Thread.currentThread().getName() + ") " + msg);
+ }
+
public static void main(String[] args) throws Exception {
final long M = 1024 * 1024;
final long initialCapacity = Long.parseLong(args[0]) * M;
final long maxCapacity = Long.parseLong(args[1]) * M;
final AtomicInteger cycles = new AtomicInteger();
@@ -65,103 +72,106 @@
final var endTime = info.getGcInfo().getEndTime();
final var duration = info.getGcInfo().getDuration();
final var memoryUsageBeforeGC = info.getGcInfo().getMemoryUsageBeforeGc().get("ZHeap");
final var memoryUsageAfterGC = info.getGcInfo().getMemoryUsageAfterGc().get("ZHeap");
- System.out.println(name + " (" + type + ")");
- System.out.println(" Id: " + id);
- System.out.println(" Action: " + action);
- System.out.println(" Cause: " + cause);
- System.out.println(" StartTime: " + startTime);
- System.out.println(" EndTime: " + endTime);
- System.out.println(" Duration: " + duration);
- System.out.println(" MemoryUsageBeforeGC: " + memoryUsageBeforeGC);
- System.out.println(" MemoryUsageAfterGC: " + memoryUsageAfterGC);
- System.out.println();
+ log(name + " (" + type + ")");
+ log(" Id: " + id);
+ log(" Action: " + action);
+ log(" Cause: " + cause);
+ log(" StartTime: " + startTime);
+ log(" EndTime: " + endTime);
+ log(" Duration: " + duration);
+ log(" MemoryUsageBeforeGC: " + memoryUsageBeforeGC);
+ log(" MemoryUsageAfterGC: " + memoryUsageAfterGC);
+ log("");
if (name.equals("ZGC")) {
cycles.incrementAndGet();
} else {
- System.out.println("ERROR: Name");
+ log("ERROR: Name");
errors.incrementAndGet();
}
if (!action.equals("end of major GC")) {
- System.out.println("ERROR: Action");
+ log("ERROR: Action");
errors.incrementAndGet();
}
if (memoryUsageBeforeGC.getInit() != initialCapacity) {
- System.out.println("ERROR: MemoryUsageBeforeGC.init");
+ log("ERROR: MemoryUsageBeforeGC.init");
errors.incrementAndGet();
}
if (memoryUsageBeforeGC.getUsed() > initialCapacity) {
- System.out.println("ERROR: MemoryUsageBeforeGC.used");
+ log("ERROR: MemoryUsageBeforeGC.used");
errors.incrementAndGet();
}
if (memoryUsageBeforeGC.getCommitted() != initialCapacity) {
- System.out.println("ERROR: MemoryUsageBeforeGC.committed");
+ log("ERROR: MemoryUsageBeforeGC.committed");
errors.incrementAndGet();
}
if (memoryUsageBeforeGC.getMax() != maxCapacity) {
- System.out.println("ERROR: MemoryUsageBeforeGC.max");
+ log("ERROR: MemoryUsageBeforeGC.max");
errors.incrementAndGet();
}
if (!cause.equals("System.gc()")) {
- System.out.println("ERROR: Cause");
+ log("ERROR: Cause");
errors.incrementAndGet();
}
if (startTime > endTime) {
- System.out.println("ERROR: StartTime");
+ log("ERROR: StartTime");
errors.incrementAndGet();
}
if (endTime - startTime != duration) {
- System.out.println("ERROR: Duration");
+ log("ERROR: Duration");
errors.incrementAndGet();
}
};
// Collect garbage created at startup
System.gc();
// Register GC event listener
for (final var collector : ManagementFactory.getGarbageCollectorMXBeans()) {
- final NotificationBroadcaster broadcaster = (NotificationBroadcaster)collector;
- broadcaster.addNotificationListener(listener, null, null);
+ final NotificationEmitter emitter = (NotificationEmitter)collector;
+ emitter.addNotificationListener(listener, null, null);
}
final int minCycles = 5;
// Run GCs
for (int i = 0; i < minCycles; i++) {
+ log("Starting GC " + i);
System.gc();
}
- // Wait at most 60 seconds
- for (int i = 0; i < 60; i++) {
+ // Wait at most 90 seconds
+ for (int i = 0; i < 90; i++) {
+ log("Waiting...");
Thread.sleep(1000);
+
if (cycles.get() >= minCycles) {
- // All events received
+ log("All events received!");
break;
}
}
final int actualCycles = cycles.get();
final int actualErrors = errors.get();
- System.out.println(" minCycles: " + minCycles);
- System.out.println("actualCycles: " + actualCycles);
- System.out.println("actualErrors: " + actualErrors);
+ log(" minCycles: " + minCycles);
+ log("actualCycles: " + actualCycles);
+ log("actualErrors: " + actualErrors);
// Verify number of cycle events
- if (cycles.get() < minCycles) {
+ if (actualCycles < minCycles) {
throw new Exception("Unexpected cycles");
}
// Verify number of errors
if (actualErrors != 0) {
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