[FUG-BR] Fw: [FreeBSD-Announce] Foundation DTrace Userland Project Announcement

[Luiz Gustavo]

FYI

Luiz Gustavo - BSD/Linux User
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<=======|=== www.luizgustavo.pro.br ===
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ICQ: 2890831 / MSN: gustavo.bsd em gmail.com


--- On Tue, 6/29/10, Deb Goodkin <deb em freebsdfoundation.org> wrote:

> From: Deb Goodkin <deb em freebsdfoundation.org>
> Subject: [FreeBSD-Announce] Foundation DTrace Userland Project Announcement
> To: freebsd-announce em freebsd.org
> Date: Tuesday, June 29, 2010, 2:40 PM
> Dear FreeBSD Community,
> 
> We are pleased to announce that 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," said FreeBSD developer
> Rui Paulo. He also said, "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."
> 
> The project should be completed by September 2010.
> 
> Sincerely,
> 
> The FreeBSD Foundation
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