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8376885: StressGetTotalGcCpuTimeDuringShutdown.java intermittently timed out

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Reviewed-by: cjplummer, lmesnik, kevinw
This commit is contained in:
SendaoYan 2026-05-13 06:33:49 +00:00
parent 05684dbbc0
commit cbda5317d6
1 changed files with 7 additions and 3 deletions
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10
test/jdk/java/lang/management/MemoryMXBean/StressGetTotalGcCpuTimeDuringShutdown.java
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2025, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2025, 2026, 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
@ -79,6 +79,8 @@ import java.lang.management.ManagementFactory;
import java.lang.management.MemoryMXBean;
import java.lang.management.ThreadMXBean;
import jtreg.SkippedException;
public class StressGetTotalGcCpuTimeDuringShutdown {
static final ThreadMXBean mxThreadBean = ManagementFactory.getThreadMXBean();
static final MemoryMXBean mxMemoryBean = ManagementFactory.getMemoryMXBean();
@ -86,7 +88,7 @@ public class StressGetTotalGcCpuTimeDuringShutdown {
public static void main(String[] args) throws Exception {
try {
if (!mxThreadBean.isThreadCpuTimeEnabled()) {
return;
throw new SkippedException("Thread CPU time is not enabled");
}
} catch (UnsupportedOperationException e) {
if (mxMemoryBean.getTotalGcCpuTime() != -1) {
@ -95,7 +97,8 @@ public class StressGetTotalGcCpuTimeDuringShutdown {
return;
}
final int numberOfThreads = Runtime.getRuntime().availableProcessors() * 8;
final int cpuCount = Runtime.getRuntime().availableProcessors() * 8;
final int numberOfThreads = Math.min(cpuCount, 128);
for (int i = 0; i < numberOfThreads; i++) {
Thread t = new Thread(() -> {
while (true) {
@ -103,6 +106,7 @@ public class StressGetTotalGcCpuTimeDuringShutdown {
if (gcCpuTimeFromThread < -1) {
throw new RuntimeException("GC CPU time should never be less than -1 but was " + gcCpuTimeFromThread);
}
Thread.onSpinWait();
}
});
t.setDaemon(true);