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boot Issue #223: Add support for multiboot Dec 11, 2018
builder Fix for #276 and #278 Jan 25, 2019
examples Feature/issue#318 May 21, 2019
rtl Feature/issue#318 May 21, 2019
tests Issue #240: Add ring buffer for debugging May 2, 2019
.gitignore Issue 27 and 37: Rename tests to examples and move build to builder Oct 29, 2017
.travis.yml Add Mar 20, 2019
COPYING Issue #160: add license Feb 8, 2018 Feature/issue#318 May 21, 2019

Toro Kernel


Toro is a kernel that allows the user to dedicate a whole kernel to run a single application. Toro is a set of libraries that compiles together with the user application. This results in a image that can run on top of a hypervisor, e.g., KVM, Xen, VirtualBox, or baremetal. To know more about Toro, visit the blog and the wiki.


  • Support to x86-64 architecture
  • Support up to 512GB of RAM
  • Support to KVM, Xen, HyperV, VirtualBox and Qemu-Lite
  • Cooperative Scheduler
  • Virtual FileSystem
  • Network Stack
  • Network drivers:
    • Virtio-net, E1000, NE2000
  • Disk drivers:
    • Virtio-blk, ATA
  • FileSystem drivers:
    • Ext2, Fat, VirtioFS
  • Fast boot up
  • Tiny image


The repository of Toro includes examples that show basic functionalities of the kernel. These examples are in the examples directory. Each example contains the instruction to compile it and run it on QEMU-KVM. We recommend to start with the HelloWorld example. Before go to the example, you need to install Lazarus and QEMU-KVM:

apt-get install lazarus

sudo apt-get install qemu-kvm libvirt-bin ubuntu-vm-builder bridge-utils virtinst

To try Toro, you can follow a simple tutorial here that aims at running a static web server inside a docker image.


To contribute to Toro project, go here




[0] Matias Vara. A Dedicated Kernel named Toro. FOSDEM 2015.

[1] Matias Vara. Reducing CPU usage of a Toro Appliance. FOSDEM 2018.

[2] Matias Vara, Cesar Bernardini. Toro, a Dedicated Kernel for Microservices. Open Source Summit Europe 2018.

[3] Matias Vara. Speeding Up the Booting Time of a Toro Appliance. FOSDEM 2019.

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