Re: DTrace userland project

On Wed, Sep 1, 2010 at 00:21, Rui Paulo <rpaulo_at_freebsd.org> wrote:
> Hi,
> The DTrace userland project is near completion and you can start using parts of it right away (only on FreeBSD HEAD right now).
>
> For more information on how to use DTrace with userland, please read:
> http://wiki.freebsd.org/DTrace/userland

Hi,

I set this up in a VirtualBox with 9-current r212073 amd64, 4-cores,
amd-v and nested paging enabled.
I tried
dtruss /usr/bin/true
it works but is really slow, it takes ~10s to switch vt.

I tried the pid example as well, if I execute it on ttyv0 I can see lots of
kernel trap 12 with interrupts disabled
messages flying by and inbetween the desired _sleep:entry probes. When
I execute that script on ttyv1 I obviously don't see the kernel trap
messages and the machine kindof locks up (no output at all). I can do
a clean ACPI shutdown though.

 - Marius