Nautilus with CARAT CAKE
Creators
- 1. Northwestern University
Description
Nautilus is an example of an Aerokernel, a very thin kernel-layer exposed (much like Unikernel) directly to a runtime system and/or application. An Aerokernel does not, by default, have a user-mode! There are several reasons for this, simplicity and performance among the most important. Furthermore, there are no heavy-weight processes---only threads, all of which share an address space. Therefore, Nautilus is also an example of a single address-space OS (SASOS). The runtime can implement user-mode features or address space isolation if this is required for its execution model.
This version of Nautilus has been modified to accommodate running with a CARAT address space abstraction (CARAT CAKE). CARAT CAKE is an extension of work found in PLDI '20 with the paper describing this work appearing in ASPLOS '22.
The concept of CARAT CAKE is to replace paging with a system that can operate using only physical addresses. Doing this enables the underlying system to have significant energy savings as well as allow new performance minded optimizations in both the micro-architecture and in software.
Files
main[1].zip
Files
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