Biscuit is a monolithic, POSIX-subset operating system kernel in Go for x86-64 CPUs. It was written to study the performance trade-offs of using a high-level language with garbage collection to implement a kernel with a common style of architecture. You can find the research paper about Biscuit here: https://www.usenix.org/system/files/osdi18-cutler.pdf
Biscuit has some important features for getting good application performance:
- Multicore
- Kernel-supported threads
- Journaled FS with concurrent, deferred, and group commit
- Virtual memory for copy-on-write and lazily mapped anonymous/file pages
- TCP/IP stack
- AHCI SATA disk driver
- Intel 10Gb NIC driver
Biscuit also includes a bootloader, a partial libc ("litc"), and some user space programs, though we could have used GRUB or existing libc implementations, like musl.
This repo is a fork of the Go repo (https://github.com/golang/go). Nearly all of Biscuit's code is in biscuit/.
The root of the repository contains the Go 1.10.1 tools/runtime. Some of Biscuit's code is modifications to the runtime, mostly in src/runtime/os_linux.go.
Biscuit used to build on Linux and OpenBSD, but probably only builds on Linux currently. You must build Biscuit's modified Go runtime before building Biscuit:
( cd src/ && ./make.bash )
then run Biscuit:
( cd biscuit/ && make qemu CPUS=2 )
Biscuit should boot, then you can type a command:
ls