SafepointALot: Generate a lot of safepoints. This works with GuaranteedSafepointInterval.
HandshakeALot: Generate a lot of handshakes. This works with GuaranteedSafepointInterval.
DeoptimizeALot: Deoptimize at every exit from the runtime system.
ZombieALot: Create zombies (non-entrant) at exit from the runtime system.
WalkStackALot: Trace stack (no print) at every exit from the runtime system.
DeoptimizeObjectsALot: For testing purposes concurrent threads revert optimizations based on escape analysis at intervals given with DeoptimizeObjectsALotInterval=n. The thread count is given with DeoptimizeObjectsALotThreadCountSingle and DeoptimizeObjectsALotThreadCountAll.
DontYieldALot: Throw away obvious excess yield calls.
StringDeduplicationResizeALot: Force more frequent table resizing.
DeoptimizeNMethodBarriersALot: Make nmethod barriers deoptimise a lot.