Join GitHub today
GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together.Sign up
Kitten Lightweight Kernel
Fetching latest commit…
Cannot retrieve the latest commit at this time.
|Type||Name||Latest commit message||Commit time|
|Failed to load latest commit information.|
Quick Start ============ make config (or make menuconfig, choosing all defaults will work) make isoimage qemu-system-x86_64 -cdrom arch/x86_64/boot/image.iso -serial stdio -smp 4 What you should see: A bunch of kernel initialization messages print to the console, followed by: <6>Loading initial user-level task (init_task)... <8>(init_task) Hello, world! <8>(init_task) Arguments: <8>(init_task) argv = init_task <8>(init_task) argv = one <8>(init_task) argv = two <8>(init_task) argv = three <8>(init_task) Environment Variables: <8>(init_task) envp = one=1 <8>(init_task) envp = two=2 <8>(init_task) envp = three=3 [... A bunch of test messages, omitted here] <8>(init_task) Spinning forever... <8>(init_task) main: Meow 0! <8>(init_task) main: Meow 1! <8>(init_task) main: Meow 2! <8>(init_task) main: Meow 3! <8>(init_task) main: Meow 4! <8>(init_task) main: Meow 5! <8>(init_task) main: Meow 6! <8>(init_task) main: Meow 7! <8>(init_task) main: Meow 8! <8>(init_task) main: Meow 9! <8>(init_task) That's all, folks! The source code for the hello world init_task is at user/hello_world/hello_world.c NOTE: If the hello_world output includes a bunch of errors like: [c0-0c1s7n2][init_task.thread_16] SYS_MMAP: ENOMEM (len=134217728, heap_brk=6f5000, mmap_brk=2650000) [c0-0c1s7n2][init_task.thread_16] SYS_MMAP: ENOMEM (len=67108864, heap_brk=6f5000, mmap_brk=2650000) It is likely due to Glibc's malloc implementation using per-thread arenas. This works fine on an OS that uses an allocate on first-touch memory allocation policy. On Kitten this is very wasteful because Kitten allocates all memory up-front at allocation time, even if it is never used/touched. To disable Glibc's per-thread arenas, set the following environment variable: MALLOC_ARENA_MAX=1 This can be passed to the init_task via the Kitten boot command line: init_envp="MALLOC_ARENA_MAX=1" Overview ======== Kitten is a lightweight kernel (LWK) compute node operating system, similar to previous LWKs such as SUNMOS, Puma, Cougar, and Catamount. Kitten distinguishes itself from these prior LWKs by providing a Linux-compatible user environment, a more modern and extendable codebase, and a virtual machine monitor capability via Palacios that allows full-featured guest operating systems to be loaded on-demand. Supported Host (Build) Platforms ================================ The Kitten kernel and user applications are compiled on a standard x86_64 (64-bit only, no 32-bit support) Linux host. The following distributions have been verified to work: * Fedora Core 15 Must install glibc-static and syslinux packages Known Issue: The "mktemp is dangerous" link warnings can be ignored * RedHat Enterprise Linux 6 (RHEL 6) Must install glibc-static, syslinux, and syslinux-devel packages Known Issue: The "mktemp is dangerous" link warnings can be ignored * Ubuntu 10.10 * RedHat Enterprise Linux 5 (RHEL 5) Supported Target (Execution) Platforms ====================================== The Kitten kernel should boot on any x86_64 PC-compatible system. By default, console output is to both the VGA device and COM1 serial port. The following platforms have been verified to work: Emulators: * qemu-system-x86_64 * kvm (running on a 64-bit x86 system) * virtualbox (with a bit of configuration, be sure to enable IO APIC) Real Hardware: * HP ProLiant BL460c G6 BladeSystem with dual-socket quad-core Intel Xeon X5570, 24 GB RAM, no disk * HP ProLiant BL465c G7 BladeSystem with dual-socket 12-core AMD Opteron 6172, 32 GB RAM, no disk * Cray XT4 compute nodes with single-socket quad-core AMD Opteron 1354, 8 GB RAM, SeaStar 2.1 network interface, no disk Instructions for Booting on Real Hardware ========================================= PC-compatible hardware: Do 'make config' and choose: System Architecture ---> PC-compatible (the default) Rebuild, and use the following files: kernel image: ./arch/x86_64/boot/bzImage initrd: ./init_task In order to see any output a console must be specified via the console parameter on the kernel boot command line. Examples: console=vga console=serial console=vga,serial console=serial serial.port=0x2f8 serial.baud=9600 Cray XE and XK hardware: Do 'make config' and choose: System Architecture ---> Cray XE and XK systems Rebuild, and then use the following files: kernel image: ./vmlwk.bin initrd: ./init_task Pass the following kernel command line to setup the console: console=serial serial.baud=115200 Instructions for Building with Palacios VMM Support =================================================== Palacios is a virtual machine monitor (VMM) being developed by the V3VEE project (http://v3vee.org). Palacios is distributed and built separately from Kitten, but can be linked with Kitten as part of the normal Kitten build process. The Kitten+Palacios combination allows full guest operating system images to be launched and managed similarly to native Kitten tasks. Installation Steps: 1. Download the latest Kitten and Palacios releases: http://software.sandia.gov/trac/kitten http://www.v3vee.org/download 2. Unpack them into the same directory: > cd where-id-like-to-build > tar xzvf downloaded-file-location/palacios.tar.gz > tar xzvf downloaded-file-locaiton/kitten.tar.gz 3. Build Palacios: > cd palacios > make config (or make menuconfig, choosing all defaults will work) > make > cd .. 4. Configure Kitten to link with Palacios: > cd kitten > make config (or make menuconfig, choosing all defaults will work) Answer 'Y' when prompted for: "Include Palacios virtual machine monitor:" Specify "../palacios" when prompted for: "Path to pre-built Palacios tree: " Specify the path to the guest image to boot when prompted for: "Path to guest OS image:" NOTE: Palacios previously booted an ISO image directly. It now boots a custom image format that consists of an XML header describing the virtual hardware environment, followed by an ISO image of the guest OS to boot. Instructions for building this image are provided in the Palacios Deverloper Manual available at http://www.v3vee.org/palacios. After an image has been built, the Kitten "Path to guest OS image: " config option should be set to the path of the image. 5. Build Kitten > make isoimage If successful, a bootable ISO image will be located at: kitten/arch/x86_64/boot/image.iso This requires the "syslinux" package to create a bootable ISO image. Most Linux distributions include a syslinux package, but it is usually not part of the standard install. 6. Boot the resulting image: > qemu-system-x86_64 -cdrom kitten/arch/x86_64/boot/image.iso -m 1024 -serial stdio -smp 4 By default the guest OS's console is output to the VGA device and Kitten's console is output to the serial port. If booting Puppy Linux, type "puppy acpi=off pfix=nox" at the boot prompt. This turns ACPI off and disables X windows. Instructions for booting on real hardware are given above.