GPU Forecasters: Language Models as Selective Surrogates for Kernel Runtime Optimization
Researchers propose using language models as cost-efficient predictors of GPU kernel performance, addressing a critical bottleneck in automated kernel optimization. As LLM-driven search scales and inference costs drop, repeated on-device evaluation becomes prohibitively expensive. This work explores selective surrogate modeling, where LLMs forecast kernel runtime and flag uncertainty to defer costly measurements to hardware. The approach could reshape how deep learning infrastructure is optimized, reducing the feedback loop between kernel design and validation and enabling larger search budgets without proportional hardware costs.
Modelwire context
ExplainerThe key mechanism here is selectivity: the system doesn't just predict runtime, it also estimates its own confidence and decides when to skip the prediction and fall back to real hardware measurement. That uncertainty-aware deferral is what separates this from a simple regression model dressed up with a transformer.
This is largely disconnected from recent activity in our archive, as we have no prior coverage to anchor it to. It belongs to a broader cluster of work on automated kernel optimization and ML-driven compiler search, a space that includes projects like OpenAI Triton, Google's autotuning work in XLA, and Meta's compiler research. The underlying pressure driving this paper is real: as search budgets for kernel design grow, the cost of hardware-in-the-loop evaluation scales badly. Using a learned surrogate to filter candidates before touching silicon is a practical engineering response to that cost curve.
Watch whether any of the major compiler or kernel library teams (Triton, cuBLAS alternatives, or IREE) publish adoption or replication results within the next six months. If the surrogate's uncertainty estimates prove well-calibrated across diverse kernel families beyond the paper's benchmarks, integration into production search pipelines becomes credible.
This analysis is generated by Modelwire’s editorial layer from our archive and the summary above. It is not a substitute for the original reporting. How we write it.
MentionsLLM · GPU kernels · evolutionary search · LLM-driven search
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