Test:
java/lang/Thread/virtual/stress/Skynet.java#id0
java/lang/Thread/virtual/stress/Skynet.java#id1

OS: linux-aarch64-debug,linux-aarch64
Where: 20.0.1+7
Is it a regression: No, Its an intermittent issue
vm options: "-XX:+CreateCoredumpOnCrash -XX:TieredStopAtLevel=3"
Log:

----------System.out:(1233/74746)----------
Result: 499999500000 in 13523 ms
Timeout refired 2400 times
Exception in VM (AttachListener::init) :
java.lang.OutOfMemoryError: Java heap space
Exception in VM (AttachListener::init) :
java.lang.OutOfMemoryError: Java heap space
Exception in VM (AttachListener::init) :
java.lang.OutOfMemoryError: Java heap space
Exception in VM (AttachListener::init) :
java.lang.OutOfMemoryError: Java heap space
Exception in VM (AttachListener::init) :
java.lang.OutOfMemoryError: Java heap space
Exception in VM (AttachListener::init) :
java.lang.OutOfMemoryError: Java heap space
Exception in VM (AttachListener::init) :
java.lang.OutOfMemoryError: Java heap space
Exception in VM (AttachListener::init) :
java.lang.OutOfMemoryError: Java heap space
Exception in VM (AttachListener::init) :
java.lang.OutOfMemoryError: Java heap space
Exception in VM (AttachListener::init) :
java.lang.OutOfMemoryError: Java heap space
Exception in VM (AttachListener::init) :
java.lang.OutOfMemoryError: Java heap space
Exception in VM (AttachListener::init) :
java.lang.OutOfMemoryError: Java heap space
Exception in VM (AttachListener::init) :
java.lang.OutOfMemoryError: Java heap space
Exception in VM (AttachListener::init) :
java.lang.OutOfMemoryError: Java heap space
Exception in VM (AttachListener::init) :
java.lang.OutOfMemoryError: Java heap space
Exception in VM (AttachListener::init) :
java.lang.OutOfMemoryError: Java heap space
Exception in VM (AttachListener::init) :
java.lang.OutOfMemoryError: Java heap space
Exception in VM (AttachListener::init) :
java.lang.OutOfMemoryError: Java heap space
Exception in VM (AttachListener::init) :
java.lang.OutOfMemoryError: Java heap space
Exception in VM (AttachListener::init) :
java.lang.OutOfMemoryError: Java heap space
Exception in VM (AttachListener::init) :
java.lang.OutOfMemoryError: Java heap space
Exception in VM (AttachListener::init) :
java.lang.OutOfMemoryError: Java heap space
Exception in VM (AttachListener::init) :
java.lang.OutOfMemoryError: Java heap space
Exception in VM (AttachListener::init) :
java.lang.OutOfMemoryError: Java heap space
Exception in VM (AttachListener::init) :
java.lang.OutOfMemoryError: Java heap space
Exception in VM (AttachListener::init) :
java.lang.OutOfMemoryError: Java heap space
Exception in VM (AttachListener::init) :
java.lang.OutOfMemoryError: Java heap space
Exception in VM (AttachListener::init) :
java.lang.OutOfMemoryError: Java heap space
Exception in VM (AttachListener::init) :
java.lang.OutOfMemoryError: Java heap space
Exception in VM (AttachListener::init) :
java.lang.OutOfMemoryError: Java heap space
Exception in VM (AttachListener::init) :
java.lang.OutOfMemoryError: Java heap space
Exception in VM (AttachListener::init) :
java.lang.OutOfMemoryError: Java heap space
Exception in VM (AttachListener::init) :
java.lang.OutOfMemoryError: Java heap space
Exception in VM (AttachListener::init) :
java.lang.OutOfMemoryError: Java heap space
Exception in VM (AttachListener::init) :
java.lang.OutOfMemoryError: Java heap space
Exception in VM (AttachListener::init) :
java.lang.OutOfMemoryError: Java heap space
Exception in VM (AttachListener::init) :
java.lang.OutOfMemoryError: Java heap space
Exception in VM (AttachListener::init) :
java.lang.OutOfMemoryError: Java heap space
2023-03-02 06:50:28
Full thread dump Java HotSpot(TM) 64-Bit Server VM (20.0.1+7-27 mixed mode, sharing):

Threads class SMR info:
_java_thread_list=0x0000fffd78000b60, length=10, elements={
0x0000fffde802c010, 0x0000fffde8209af0, 0x0000fffde820b050, 0x0000fffde820ca80,
0x0000fffde820df30, 0x0000fffde820f3d0, 0x0000fffde8210960, 0x0000fffde8237890,
0x0000fffde823cab0, 0x0000fffde8271d50
}

"main" #1 [277847] prio=5 os_prio=0 cpu=30.21ms elapsed=2523.99s tid=0x0000fffde802c010 nid=277847 in Object.wait() [0x0000fffdeec7e000]
   java.lang.Thread.State: WAITING (on object monitor)
at java.lang.Object.wait0(java.base@20.0.1/Native Method)
- waiting on <0x00000000c00010c8> (a java.lang.Thread)
at java.lang.Object.wait(java.base@20.0.1/Object.java:366)
at java.lang.Thread.join(java.base@20.0.1/Thread.java:2115)
- locked <0x00000000c00010c8> (a java.lang.Thread)
at java.lang.Thread.join(java.base@20.0.1/Thread.java:2191)
at com.sun.javatest.regtest.agent.MainWrapper.main(MainWrapper.java:72)