Trap Entry/Exit, Interrupt Priority, and Exception Precision: Step-by-Step Walkthrough

Step-by-step walkthrough

Step-by-Step Walkthrough for Trap Entry/Exit, Interrupt Priority, and Exception Precision is anchored on Worst-case trap-entry cycles, interrupt response jitter, and precise-exception replay success rate under pipeline backpressure.. Convert observations into mechanism-backed decisions with explicit ownership.

1. Define failing workload and acceptance threshold.

2. Capture reproducible metadata and evidence snapshot.

3. Classify dominant mechanism path.

4. Propose minimal reversible change.

5. Validate cross-workload and corner behavior.

6. Document owner and rollout decision.

Reference path

RISC-V PIPELINE DIAGRAM - Trap Entry/Exit, Interrupt Priority, and Exception Precision

PC -> IF -> ID -> EX -> MEM -> WB
      |     |      |      |      |
  i-cache decode  ALU/BR  LSU    regfile write
              \   |
               +-> branch resolve + redirect

Hot paths:
  - branch + load-use dependencies in ID/EX
  - memory latency stretching MEM stage
  - writeback arbitration for integer/vector units

Focus: keep control hazards predictable