[BSD-INDIA] FreeBSD / PMC tools talk by Joseph Koshy - FreeBSD committer

[Arun Sharma]

On Tue, May 19, 2009 at 12:27 AM, Siju George <sgeorge.ml at gmail.com> wrote:

> On Mon, May 18, 2009 at 9:54 PM, Arun Sharma <arun at sharma-home.net> wrote:
> >
> > There is continuing controversy about whether this type of an abstraction
> is
> > a good thing or  raw hardware should be exposed to user space (and
> whether
> > counter scheduling should be managed in userspace).
> >
>
> I think the OpenBSD policy is that raw hardware should not be exposed
> to user space.
>
> http://marc.info/?l=openbsd-misc&m=114738577123893
>

I'm sure OpenBSD leaves some of the hardware scheduling (eg: general purpose
registers) to user space (i.e. the compiler :)

I would expect most sane implementations to restrict system wide profiling
and allow per process profiling more broadly (i.e. you don't have to be a
user with special privileges as long as you're profiling your own stuff).

 -Arun
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