RFR: 8367302: New test jdk/jfr/event/profiling/TestCPUTimeSampleQueueAutoSizes.java from JDK-8366082 is failing

[Johannes Bechberger]

On Thu, 18 Sep 2025 01:58:18 GMT, Andrei Pangin <apangin at openjdk.org> wrote:

>> test/jdk/jdk/jfr/event/profiling/TestCPUTimeSampleQueueAutoSizes.java line 154:
>> 
>>> 152:         ThreadMXBean bean = ManagementFactory.getThreadMXBean();
>>> 153:         long start = bean.getCurrentThreadCpuTime();
>>> 154:         while (bean.getCurrentThreadCpuTime() - start < millis * 1_000_000) {
>> 
>> Isn't this method supposed to check CPU time of the passed `thread` rather than current thread?
>
> BTW, is there a specific reason to burn cpu in a separate thread? It can be done in the same `main` thread, isn't it?

> Isn't this method supposed to check CPU time of the passed thread rather than current thread?

You're correct.

> It can be done in the same main thread, isn't it?

You're correct and it makes the code so much easier.

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PR Review Comment: https://git.openjdk.org/jdk/pull/27293#discussion_r2359252129