[Intel-gfx] [PATCH i-g-t 1/3] lib/igt_aux: Export statistics of signal helper.

[Daniel Vetter]

On Mon, Aug 07, 2017 at 10:59:55AM +0100, Chris Wilson wrote:
> Quoting Maarten Lankhorst (2017-08-07 10:45:38)
> > Op 04-08-17 om 09:50 schreef Chris Wilson:
> > > Quoting Maarten Lankhorst (2017-08-02 11:29:17)
> > >> Export 2 functions, igt_signal_helper_get_num and
> > >> igt_signal_helper_get_hz.
> > >>
> > >> This will allow tests to measure how much time in a test was spent
> > >> in a uninterruptible state, which is useful when testing whether
> > >> certain ioctl's can be interrupted or not.
> > > Use sig_ioctl, the purpose of that wrapper is to measure whether or not it
> > > was interrupted. Refine it to suit your purposes, it is the surgical
> > > scalpel compared to the shotgun of signal_helper.
> > > -Chris
> > 
> > I've been using the igt display helpers now so I don't have to worry about the ioctl's. Using sig_ioctl would mean having to perform the ioctl's myself, and that makes the code a lot more verbose..
> 
> You know that we igt uses igt_ioctl so that we can switch the ioctl
> wrapper. What you have here is sig_ioctl so rather than painting the
> shotgun signal helper a different colour, use the interface that
> actually supports what you have in mind.

Might be good to spicy the docs up a bit to make this clearer, maybe even
with an example and some links between the different bits? Mika/Maarten?
-Daniel
-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch