https://github.com/LinShunKang/MyPerf4J,4c0a98d8f0f93733b0fddbb2b4b3dd4edd32470d,MyPerf4J-Base,cn.myperf4j.base.util.concurrent.AtomicIntHashCounterTest.testMultiThread4HighRace/testMultiThread4LowRace

[CaseyPan]

The test is addressed in this issue and has inspired a developer fix at this commit.

1. Test Overview:
   Location: Myperf4j-Base/util/concurrent/AtomicIntHashCounterTest.java
   Test : testMultiThread4HighRace and testMultiThread4LowRace

   The two test are designed to assess the behavior of a multi-threaded scenario with varying levels of contention, and they use random parameters to perform a large number of iterations to test the stability and correctness of the tested code.

2. Reason of flakiness:
   ExecutorService newFixedThreadPool(int nThreads) method creates a thread pool that reuses a fixed number of threads operating off a shared unbounded queue. And it will throw error message IllegalArgumentException if nThreads <= 0.
   The author initially set the threadCnt to availableProcessors() - 2 to maybe avoid occupying too many computing resources. However, when the machine we use has less than 2 processors, an error will arise.

3. Changes:

   • Use 1 as thread count when when the machine we use has less than 2 processors.