Baidu Intelligent Testing

Dec 9, 2015 · Fundamentals

Investigation of Query‑Diff Precision Differences Caused by CPU Instruction‑Set Variations (AVX vs SSE)

A detailed case study shows how a 1% precision difference discovered by query‑diff testing was traced to CPU instruction‑set discrepancies (AVX vs SSE), highlighting the impact of hardware‑level floating‑point optimizations on algorithmic results and providing practical debugging and mitigation guidelines.