Seminar iz veštačke inteligencije, 9. jun 2021.

Naredni sastanak Seminara biće održan onlajn u sredu, 9. juna 2021. od 19 do 20 časova.

Predavač: dr Saša Misailović, docent na Departmanu za računarske nauke, University of Illinois, Urbana-Champaign, SAD

Naslov predavanja: ACCURACY-AWARE PROGRAMMING SYSTEMS FOR MACHINE LEARNING APPLICATIONS

Apstrakt:
Tradeoffs between accuracy, performance and energy exist in many resource-intensive applications pervasive in machine learning and robotics. Manually optimizing these tradeoffs with flexible accuracy or precision requirements is extremely difficult. I will present our work on programming systems (including languages, compilers, and runtime systems) for accuracy aware optimization of programs. A particular focus of the talk will be on ApproxTuner, a novel automatic framework for accuracy-aware optimization of tensor-based applications that requires only high-level end-to-end quality specifications. ApproxTuner implements and manages approximations in algorithms, system software, and hardware. The key contribution in ApproxTuner is a novel three-phase approach to approximation-tuning that consists of development-time, install-time, and run-time phases. Our approach decouples tuning of hardware-independent and hardware-specific approximations, thus providing retargetability across devices. We evaluate ApproxTuner across 10 convolutional neural networks (CNNs) and a combined CNN and image processing benchmark. For the evaluated CNNs, using only hardware-independent approximation choices we achieve a mean speedup of 2.1x (max 2.7x) on a GPU, and 1.3x mean speedup (max 1.9x) on the CPU, while staying within 1 percentage point of inference accuracy loss. For two different accuracy-prediction models, ApproxTuner speeds up tuning by 12.8x and 20.4x compared to conventional empirical tuning while achieving comparable benefits. In the talk, I will highlight applications from the domains of connected self-driving vehicles and agricultural robotics that can leverage our optimizations.

ApproxTuner is developed on top of HPVM, a new general compiler infrastructure for heterogeneous systems developed at UIUC. This is a joint work with some of the original designers of the LLVM compiler. ApproxTuner has been presented recently at PPoPP 2021 and my previous works are available at
https://misailo.cs.illinois.edu/

Registraciona forma za učešće na Seminaru je dostupna na:
https://miteam.mi.sanu.ac.rs/asset/CW5nJWDSEZDj7p32p

Prenos seminara je dostupan i registrovanim i neregistrovanim korisnicima na sledećem linku:
https://miteam.mi.sanu.ac.rs/asset/4LNW8WtML7rLKojoz


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