Pipeline conflict caused by unavailable hardware resources.

Pipeline uncertainty caused by branching instructions.

Independent processing unit within a processor.

Access where requested data is absent from the cache.

Arithmetic Logic Unit performing integer arithmetic and logic.

Hardware accelerating AES encryption and decryption.

Fixed-size unit of data transferred between cache levels.

Access where requested data is found in the cache.

Floating-Point Unit performing floating-point calculations.

Hardware accelerating SHA-family hash calculations.