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obsidian/phd/weekly-report/25/251130.md

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Objectives

  • Auto LLM inference config tuner

Key Results

  • [7/10] Build the first version auto tuner system
  • [7/10] Check the current situation of parallelism config optimization
  • [4/10] Understand the possibility/challenges in LLM inference compute graph arrangement automatically
  • [0/10] Trace vLLM compute graph and data flow
  • [3/10] Implement a minimal Rust inference framework
  • [1/10] Define the IR for automatic optimization
  • [5/10] Profile different parallelism setup with real trace and analysis their difference
  • [0/10] Meta-analysis for the theory maximum improvement with heterogenous setup [offtrack]

Last Week

  • [KR1] Update workload generator from real workload, not only support different timestamps, but also input_length, output_length and KVCache hit ratio from real workloads. Then benchmark to check whether we can use an abstract spec to replay the similar performance. b0bcfa63~fb1f0848
  • [KR1] Check the root cause of performance gap under different similar workloads. The difference mainly comes from different inference load.

Next Week

  • Update the workload abstraction spec for more precise replayed performance.