Create a stable test group in TEST.groups that facilitate all stable testcases execution in one go!
Initial known stable test groups and sub-directories include

:jdk_core
:jdk_svc
:jdk_beans
:jdk_imageio
:jdk_sound
:jdk_sctp
javax/accessibility
com/sun/java/swing
javax/print
sun/pisces
com/sun/awt

The above groups and sub-directories were tested for OpenJDK.