Open transPREcision COMPuting


Guaranteed numerical precision of each elementary step in a complex computation has been the mainstay of traditional computing systems for many years. This era, fueled by Moore's law and the constant exponential improvement in computing efficiency, is at its twilight: from tiny nodes of the Internet-of-Things, to large HPC computing centers, sub-picoJoule/ operation energy efficiency is essential for practical realizations. To overcome the “power wall”, a shift from traditional computing paradigms is now mandatory.   OPRECOMP aims at demolishing the ultra-conservative “precise” computing abstraction and replacing it with a more flexible and efficient one, namely transprecision computing. OPRECOMP will investigate the theoretical and practical understanding of the energy efficiency boost obtainable when accuracy requirements on data being processed, stored and communicated can be lifted for intermediate calculations. While approximate computing approaches have been used before, in OPRECOMP for the first time ever, a complete framework for transprecision computing, covering devices, circuits, software tools, and algorithms, along with the mathematical theory and physical foundations of the ideas will be developed that not only will provide error bounds with respect to full precision results, but also will enable major energy efficiency improvements even when there is no freedom to relax end-to-end application quality-of-results.   The mission of OPRECOMP is to demonstrate using physical demonstrators that this idea holds in a huge range of application scenarios in the domains of IoT, Big Data Analytics, Deep Learning, and HPC simulations: from the sub-milliWatt to the MegaWatt range, spanning nine orders of magnitude. In view of industrial exploitation, we will prove the quality and reliability and demonstrate that transprecision computing is the way to think about future systems.

Project details

Unibo Team Leader: Michela Milano

Unibo involved Department/s:
Dipartimento di Informatica - Scienza e Ingegneria

Ibm Research Gmbh(Switzerland)

Other Participants:
GreenWaves Technologies (France)
The Queen'S University Of Belfast (United Kingdom)
Università  degli Studi di PERUGIA (Italy)
Technische Universitaet Kaiserslautern (Germany)
Cea-Commissariat A L'Energie Atomique Et Aux Energies Alternatives (France)
ALMA MATER STUDIORUM - Università di Bologna (Italy)
Universitat Jaume i de Castello (Spain)
Eidgenoessische Technische Hochschule Zurich (Switzerland)
Cineca - Consorzio Interuniversitario (Italy)

Total Eu Contribution: Euro (EUR) 5.990.510,00
Project Duration in months: 48
Start Date: 01/01/2017
End Date: 31/12/2020

Cordis webpage
Project website

Industry, innovation and infrastructure This project contributes to the achievement of the Sustainable Development Goals of the UN 2030 Agenda.

UE flag This project has received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement No 732631