FreeBSD Foundation funded projects (Jail, DTrace)

One of the ways the FreeBSD Foundation supports FreeBSD, is by funding FreeBSD development (e.g. the Jail based virtualisation project). The Foundation has agreed to fund two more projects:

I Resource Containers Project

This project will be undertaken by Edward Tomasz Napierala. “Unlike Solaris zones, the current implementation of FreeBSD Jails does not provide per-jail resource limits. As a result, users are often forced to replace jails with other virtualization mechanisms. The goal of this project is to create a single, unified framework for controlling resource utilisation, and to use that framework to implement per-jail resource limits. In the future, the same framework might be used to implement more sophisticated resource controls, such as Hierarchical Resource Limits, or to implement mechanisms similar to AIX WLM. It could also be used to provide precise resource usage accounting for administrative or billing purposes.”

“It’s great that the Foundation decided to fund this project. It will make jail-based virtualization a much better choice in many scenarios, for example for Virtual Private Server providers.”

Edward noted.

II DTrace Userland Project

Rui Paulo has been awarded a grant to add DTrace userland support to FreeBSD.

DTrace is a general purpose and lightweight tracing framework that allows administrators, developers and users to investigate causes of system failure or performance bottlenecks. The FreeBSD operating system has had support for kernel-only DTrace since FreeBSD 8.0, but DTrace userland support was missing. Having userland support in DTrace allows inspection of userland software itself and its correlation with the kernel, thus allowing a much better picture of what exactly is going on behind the scenes.

This project will first concentrate on adding libproc support for symbol to address mapping, address to symbol mapping, breakpoint setup and the rtld interactions with DTrace. Next it will focus on DTrace process control, importing the pid provider and adapting it to FreeBSD and porting the userland statically defined probe provider (usdt). Finally it will bring in the plockstat provider.

“By having userland DTrace support, companies can make their products perform much better on FreeBSD due to the fact that they now have access to this amazing tool. When we mix the userland support with the kernel side DTrace support, we can also make FreeBSD a better operating system because we can investigate performance bottlenecks much easier.”

said FreeBSD developer Rui Paul

Well done to Rui and Edward. We’re looking forward to testing the results of their work at the end of the year. If you wish to see more of these sort of projects, you can donate to the FreeBSD Foundation.

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