arXiv subjects

Emanuele Del Sozzo

Publications and source records attributed to Emanuele Del Sozzo.

3 recordsLinked to original sources

arXiv2026

How Much Progress Has There Been in NVIDIA Datacenter GPUs?

As the role of modern Graphics Processing Units (GPUs) becomes increasingly essential for several computing tasks, analyzing their past and current progress is paramount for determining future constraints on scientific research. This is particularly compelling in the Artificial Intelligence (AI) domain, where rapid technological advancements and fierce global competition have led the United States to recently implement export control regulations limiting international access to advanced AI chips. Consequently, this paper examines technical progress in NVIDIA datacenter GPUs from the mid-2000s through 2025. Our main results identify doubling times of 1.43 and 1.67 years for FP16 and FP32 dense operations, while FP64 doubling times range from 2.05 to 3.79 years. Off-chip memory size and bandwidth have grown at slower rates than computing performance, doubling every 3.29 to 3.41 years, whereas the release prices and power consumption roughly doubled every 5.03 and 15 years, respectively. Moreover, our cross-vendor comparison of the top-performing GPUs per year shows that NVIDIA's performance advantage is narrowing, but not enough to compel a major market shift. Finally, we quantify the potential implications of current U.S. export control regulations and the consequent performance gaps, which the recently proposed policy changes could shrink from 23.6X to 3.54X.

cs.AR↗

arXiv2018

Tiramisu: A Polyhedral Compiler for Expressing Fast and Portable Code

This paper introduces Tiramisu, a polyhedral framework designed to generate high performance code for multiple platforms including multicores, GPUs, and distributed machines. Tiramisu introduces a scheduling language with novel extensions to explicitly manage the complexities that arise when targeting these systems. The framework is designed for the areas of image processing, stencils, linear algebra and deep learning. Tiramisu has two main features: it relies on a flexible representation based on the polyhedral model and it has a rich scheduling language allowing fine-grained control of optimizations. Tiramisu uses a four-level intermediate representation that allows full separation between the algorithms, loop transformations, data layouts, and communication. This separation simplifies targeting multiple hardware architectures with the same algorithm. We evaluate Tiramisu by writing a set of image processing, deep learning, and linear algebra benchmarks and compare them with state-of-the-art compilers and hand-tuned libraries. We show that Tiramisu matches or outperforms existing compilers and libraries on different hardware architectures, including multicore CPUs, GPUs, and distributed machines.

cs.PL↗

arXiv2018

Technical Report about Tiramisu: a Three-Layered Abstraction for Hiding Hardware Complexity from DSL Compilers

High-performance DSL developers work hard to take advantage of modern hardware. The DSL compilers have to build their own complex middle-ends before they can target a common back-end such as LLVM, which only handles single instruction streams with SIMD instructions. We introduce Tiramisu, a common middle-end that can generate efficient code for modern processors and accelerators such as multicores, GPUs, FPGAs and distributed clusters. Tiramisu introduces a novel three-level IR that separates the algorithm, how that algorithm is executed, and where intermediate data are stored. This separation simplifies optimization and makes targeting multiple hardware architectures from the same algorithm easier. As a result, DSL compilers can be made considerably less complex with no loss of performance while immediately targeting multiple hardware or hardware combinations such as distributed nodes with both CPUs and GPUs. We evaluated Tiramisu by creating a new middle-end for the Halide and Julia compilers. We show that Tiramisu extends Halide and Julia with many new capabilities including the ability to: express new algorithms (such as recurrent filters and non-rectangular iteration spaces), perform new complex loop nest transformations (such as wavefront parallelization, loop shifting and loop fusion) and generate efficient code for more architectures (such as combinations of distributed clusters, multicores, GPUs and FPGAs). Finally, we demonstrate that Tiramisu can generate very efficient code that matches the highly optimized Intel MKL gemm (generalized matrix multiplication) implementation, we also show speedups reaching 4X in Halide and 16X in Julia due to optimizations enabled by Tiramisu.

cs.PL↗