Performance-Aligned LLMs for Generating Fast Code

• URL: http://arxiv.org/abs/2404.18864v1
• Date: Mon, 29 Apr 2024 16:52:38 GMT
• Title: Performance-Aligned LLMs for Generating Fast Code
• Authors: Daniel Nichols, Pranav Polasam, Harshitha Menon, Aniruddha Marathe, Todd Gamblin, Abhinav Bhatele,
• Abstract summary: We introduce a reinforcement learning based methodology to align the outputs of code LLMs with performance. We demonstrate that our fine-tuned model improves the expected speedup of generated code over base models for a set of benchmark tasks.
• Score: 2.180216161965907
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Optimizing scientific software is a difficult task because codebases are often large and complex, and performance can depend upon several factors including the algorithm, its implementation, and hardware among others. Causes of poor performance can originate from disparate sources and be difficult to diagnose. Recent years have seen a multitude of work that use large language models (LLMs) to assist in software development tasks. However, these tools are trained to model the distribution of code as text, and are not specifically designed to understand performance aspects of code. In this work, we introduce a reinforcement learning based methodology to align the outputs of code LLMs with performance. This allows us to build upon the current code modeling capabilities of LLMs and extend them to generate better performing code. We demonstrate that our fine-tuned model improves the expected speedup of generated code over base models for a set of benchmark tasks from 0.9 to 1.6 for serial code and 1.9 to 4.5 for OpenMP code.

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