Title: AI Breakthrough: Permutation Invariant Transformation (PIT) for Dynamic Sparsity Optimization
Introduction
Recently, deep learning research has made significant progress in optimizing models for dynamic sparsity. This has led to a major breakthrough in addressing the challenge of efficient computation when sparsity patterns are only known at runtime. The solution, called Permutation Invariant Transformation (PIT), was showcased at the 29th ACM Symposium on Operating Systems Principles.
What is Permutation Invariant Transformation (PIT)?
Traditionally, sparsity-aware deep learning solutions struggled with predefined, static sparsity patterns, making it difficult to handle dynamic sparsity patterns known only at runtime. PIT leverages a mathematically proven property, allowing it to balance high GPU utilization and minimal coverage waste. It identifies feasible PIT rules for all operators within a given model, creating efficient GPU kernels tailored to specific requirements of dynamic sparsity.
How Does PIT Work?
PIT uses two critical primitives – SRead and SWrite – to execute PIT rules rapidly, supporting dynamic sparsity online. Its online sparsity detection and transformation mechanisms, as well as the Permutation Invariant Transformation, allow PIT to construct computation-efficient dense tiles from micro-tiles, aligning with GPU-friendly configurations.
Results and Impact
In extensive testing, PIT accelerated dynamic sparsity computation by up to 5.9 times compared to state-of-the-art compilers. It extends to sparse training scenarios, solidifying its position as a versatile and robust solution. This research lays the foundation for transformative advancements in dynamic sparsity adaptation, positioning PIT as a pivotal player in the ever-evolving landscape of deep learning optimization.
Conclusion
The groundbreaking dynamic sparsity optimization tool, Permutation Invariant Transformation (PIT), addresses the challenge of aligning GPU-friendly tile configurations with sparsity-aware tile shapes. With its remarkable acceleration of computation efficiency, versatility in handling diverse models, and potential applications in sparse training scenarios, PIT is a pivotal player in the ever-evolving landscape of deep learning optimization.
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