The Anatomy of an Instruction Pipeline Hazard

# Summary The article examines instruction pipeline hazards in Nvidia's B200 GPU by analyzing real hardware behavior through microbenchmarks. The author explains that compilers must accurately model pipeline depths and instruction latencies to avoid "under-stalling" dependencies, which causes silent correctness bugs when consumer instructions read stale register values before producers finish writing results. The hardware doesn't raise exceptions for these violations—it simply executes with incorrect data—making empirical testing on actual silicon essential for validating instruction schedules beyond static analysis.