JDK18 b29 SBR the test jdk/jfr/event/gc/stacktrace/TestG1OldAllocationPendingStackTrace.java passes but fails with a test timeout

[487.311s][info][gc,heap,exit ] Heap
[487.311s][info][gc,heap,exit ] garbage-first heap total 119808K, used 48735K [0x00000000f8000000, 0x0000000100000000)
[487.311s][info][gc,heap,exit ] region size 1024K, 9 young (9216K), 2 survivors (2048K)
[487.311s][info][gc,heap,exit ] Metaspace used 6515K, committed 6720K, reserved 1114112K
[487.311s][info][gc,heap,exit ] class space used 648K, committed 768K, reserved 1048576K
----------System.err:(1/16)----------
STATUS:Passed.

test result: Error. Program `c:\ade\mesos\work_dir\jib-master\install\jdk-18+29-2007\windows-x64.jdk\jdk-18\bin\java' timed out (timeout set to 480000ms, elapsed time including timeout handling was 487874ms). Which is 8 minutes, but on heavily loaded system such as SBR run, thread and processes can get "stuck"

Unfortunately the failure handler did not capture jstack to give an indication of where the blockage is.

An addition of /timeout=180 -- add another 4 minutes might solve the problem