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Towards Highly Specialized, POSIX-compliant Software Stacks with Unikraft: Work-in-Progress

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  • Sharan Santhanam
  • Simon Kuenzer
  • Felipe Huici
  • Hugo Lefeuvre
  • Alexander Jung
  • Santiago Pagani
  • George-Cristian Muraru
  • Stefano Stabellini
  • Justin He
  • Jonathan Beri
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Abstract

Increasingly, embedded devices are being equipped with ARM processors. Because of ease-of-use and widespread support for drivers and applications, Linux is often used as the OS of choice although it consumes a significant amount of the device’s limited resources. In this paper we propose Unikraft, a fully micro-library operating system and build tool which allows for building specialized OSes and software stacks targeting one application, while removing unneeded functionality. As a proof of concept, we port Unikraft to the Raspberry Pi 3 B+ and to a Xilinx Ultra96-V2. On these boards, Unikraft is able to boot in 88-158 milliseconds, consume only hundreds of KBs of memory when running real-world application such as NGINX while still providing visible reductions in power consumption compared to Linux distributions. Unikraft is an open source project.