mcQEMU - Time-Accurate Simulation of Multi-core platforms using QEMU

Humberto Carvalho, Geoffrey Nelissen, Pavel Zaykov

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Abstract

Full-system emulators allow the execution of guest operating systems and applications without the need of having access to the real target hardware. For many applications, besides the correct functional modeling, the full-system emulator shall also be time-Accurate. In this paper, we present a new full-system multi-core simulator that delivers time-Accurate execution and preserves the functional correctness of guest application. The proposed solution is based on QEMU. We enriched QEMU with various time models of multi-core platforms. We call this new full-system simulator mcQEMU. mcQEMU supports guest CPUs with out-of-order and in-order architectures.We validated mcQEMU by emulating multi-core ARM processors in system mode. The time accuracy of mcQEMU is evaluated with the TACLeBench benchmark suite. From a timing prediction viewpoint, mcQEMU achieves an estimation error of only 15% in average when emulating the out-of-order i.MX6Quad processor by NXP. For full-system simulation, mcQEMU runs at 35 Mips for in-order architectures and 25 Mips for out-of-order ones. In user-mode simulation, mcQEMU can achieve up to 65 Mips.

Original languageEnglish
Title of host publicationProceedings - Euromicro Conference on Digital System Design, DSD 2020
EditorsAndrej Trost, Andrej Zemva, Amund Skavhaug
PublisherInstitute of Electrical and Electronics Engineers
Pages81-88
Number of pages8
ISBN (Electronic)978-1-7281-9535-3
ISBN (Print)978-1-7281-9536-0
DOIs
Publication statusPublished - Aug 2020
Event2020 23rd Euromicro Conference on Digital System Design (DSD) - Kranj, Slovenia
Duration: 26 Aug 202028 Aug 2020

Conference

Conference2020 23rd Euromicro Conference on Digital System Design (DSD)
CountrySlovenia
CityKranj
Period26/08/2028/08/20

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