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KAIST develops virtual testbed to verify infrastructure performance without costly AI servers

Researchers at the Korea Advanced Institute of Science and Technology (KAIST) developed a simulator that can verify the performance and efficiency of large AI server infrastructure before it is built. KAIST said the team’s LLM service infrastructure simulator, LLMServingSim 2.0, won the best paper award at ISPASS 2026. The platform supports GPUs and next-generation hardware such as NPUs, PIM and CXL-based memory expansion devices, and is released as open source.