LLM Agentic Explainable Control =============================== This section compares and explains the reasoning and control behavior of two LLMs—Llama 3.1 and Qwen 3-8B—in a liquid cooling control scenario. .. image:: ../images/choice.PNG :scale: 60% :alt: Agentic LLM System Overview :align: center Executive Summary Comparison ---------------------------- - **Llama 3.1:** The cooling system is currently maintaining a stable operating temperature across all five CDUs. Active cooling is provided by tower units, while cabinet valves regulate temperature precisely. - **Qwen 3-8B:** The system shows stable temperature deviations with minimal fluctuations. However, the cooling tower is operating at very low capacity (`action 0`), which may be causing reduced cooling efficiency. Cabinet 5 has a significant temperature deviation of **-13.62K**. Cooling Assessment ------------------ - **Llama 3.1:** The control goal is to **maintain current temperature levels** without further action. - **Qwen 3-8B:** Extremely low tower cooling action may **reduce overall system cooling capacity**, possibly affecting effectiveness in high-load scenarios. Short-Term Recommendation -------------------------- - **Llama 3.1:** Monitor temperature and workload distributions. Adjust valve positions if necessary. - **Qwen 3-8B:** Increase tower operation to a **moderate level** to improve heat rejection and **reduce overcooling** risks. Qwen 3-8B: Short Explanation ---------------------------- **Explanation:** The system adjusted valve positions across all cabinets to balance cooling performance and energy efficiency. Tower cooling was set low due to stable temperature trends. - **Temperature impact:** - All temperatures are within normal range with minor deviations. - Very low tower cooling may limit fine control. - **Energy efficiency:** - Low tower usage contributes to **moderate energy savings**. - **Inference time:** 1.11 seconds Qwen 3-8B: Detailed Explanation ------------------------------- **Executive Summary:** Qwen 3-8B keeps system temperatures stable and emphasizes energy efficiency. - **Temperature stability:** - Most cabinets operate within expected norms. - **Cabinet 5 shows abnormal deviation** (-13.62K), possibly due to overcooling. - **Valve actions:** - Even valve distribution across cabinets and blade groups. - Cooling tower set to low (`action 0`), improving efficiency but reducing capacity. - **Cabinet temperature:** - Cabinet 5's deviation may indicate inefficiency or control imbalance. - **Energy efficiency:** - Considered **moderate**. - Low tower usage reduces energy cost, but system responsiveness may suffer. - **Action rationale:** - Control decisions were based on observed temperature ranges. - While performance is good, overcooling risk should be monitored. - **Inference time:** 4.91 seconds