OKL4 vs L4::Pistachio

[Bryce Cronkite-Ratcliff]

Hi Gernot,

> The moral successor of Pistachio as well as the open-source version of
OKL4 is seL4.

I was not aware that seL4 is open source. If this is so, where is the
source code available?

Thanks!
Bryce


On Tue, Mar 4, 2014 at 11:07 PM, Gernot Heiser <gernot at unsw.edu.au> wrote:

> On 5 Mar 2014, at 14:42 , Taylor Bioniks <zeitue at gmail.com> wrote:
>
> How does OKL4 compare with L4::Pistachio as far as speed, security,
> responsiveness?
>
>
> Note that you're talking about two systems that have been unmaintained
> unmaintained for years: Pistachio has lost it's supporter base and OKL4
> went closed-source. Both were as fast as it gets at their peak (
> http://l4hq.org/docs/performance.php). The moral successor of Pistachio
> as well as the open-source version of OKL4 is seL4.
>
> L4::Pistachio uses kickstart to load it, the core kernel is contained in
> kernel, and the physical memory manager is stored in sigma0, I'm not even
> sure if it has a virtual memory manager.
>
> Does OKL4 have a built in memory manager, and does it handle virtual
> memory?
>
>
> Both handled VM by allowing user level to map PM into address spaces. The
> model differs somewhat. You'll find descriptions of either model in
> week-1/2 slides of vintage editions of our Advanced OS course (
> http://www.cse.unsw.edu.au/~cs9242/).
>
> Gernot
>
>
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