Hardware Filter Superscalar Processor Core Cycle 1 Instruction 1.1 Instruction 1.2 2 Instruction 2.1 Instruction 2.2 Processor Observation Block Instruction 3.1 Instruction 3.2 3 Instruction 4.1 Instruction 4.2 4 Instruction 1.1 Instruction 2.2 Instruction 2.1 Instruction 4.2 1 2 3 4 Trace Device