1. To reproduce with release build on linux-aarch64 server (Running Ubuntu 22.04.4 LTS):

$ make test TEST="serviceability/jvmti/vthread/SuspendResume1/SuspendResume1.java" TEST_VM_OPTS="-XX:TieredStopAtLevel=1"
$ make test TEST="serviceability/jvmti/vthread/SuspendResume2/SuspendResume2.java" TEST_VM_OPTS="-XX:TieredStopAtLevel=1"

Test result: SuspendResume1.java#no-vmcontinuations passes, but SuspendResume1.java#default timeouts. SuspendResume2.java is similar.

2. To reproduce with fastdebug build on linux-aarch64 server (Running Ubuntu 22.04.4 LTS):

$ make test TEST="serviceability/jvmti/vthread/SuspendResume1/SuspendResume1.java"
$ make test TEST="serviceability/jvmti/vthread/SuspendResume2/SuspendResume2.java"

Test result: SuspendResume1.java#no-vmcontinuations passes, but SuspendResume1.java#default timeouts. SuspendResume2.java is similar.

3. Same tests finish very quickly with either release or fastdebug build before JDK-8319447.