REPTILES: Repeated Tiles of Sargantana, a RISC-V multicore based on OpenPiton
Abstract
Chip industry continues advancing and expanding modern computing systems, resulting in more complex multi-core processors. Conversely, academic projects face scalability challenges due to limited resources, highlighting the need for open-source frameworks that enable innovation and knowledge sharing. Recently, several open-source proposals have emerged, offering flexible and scalable designs, but fail to meet the performance demands of modern High-Performance Computing (HPC) applications. In this project, we present REPTILES, an open-source RISC-V multicore framework based on OpenPiton\thanks. REPTILES interconnects multiple Sargantana cores with the memory hierarchy of OpenPiton. Moreover, we present the new features incorporated in Sargantana and OpenPiton designs to improve the performance of HPC applications. We demonstrate that REPTILES presents suitable scalability, achieving a speedup of 3.1x on average with 4 cores. Additionally, we show that Sargantana's new features increase the performance of vector addition benchmark in a 9.3x.
Keywords
Cite
@article{arxiv.2605.08229,
title = {REPTILES: Repeated Tiles of Sargantana, a RISC-V multicore based on OpenPiton},
author = {Noelia Oliete-Escuín and Arnau Bigas and Narcís Rodas and Albert Aguilera and Sajjad Ahmad and Jonathan Balkind and Xavier Carril and Max Doblas and Ivan Díaz and Roger Figueras and Alireza Foroodnia and Cesar Fuguet and Ignacio Genovese and Raúl Gilabert and Abbas Haghi and Alexander Kropotov and Neiel Leyva and Oscar Lostes-Cazorla and Lorién López-Villellas and Davy Million and Alireza Monemi and Sérik Pérez and Juan Antonio Rodríguez and Víctor Soria-Pardos and Behzad Salami and Francesc Moll and Oscar Palomar and Miquel Moretó and Lluc Alvarez},
journal= {arXiv preprint arXiv:2605.08229},
year = {2026}
}
Comments
RISC-V Summit Europe, Paris, 12-15th May 2025