From: Jesse Barnes <jbarnes@virtuousgeek.org>
To: Andrew Lutomirski <luto@mit.edu>
Cc: David Airlie <airlied@linux.ie>,
intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org
Subject: Re: [PATCH] drm: Aggressively disable vblanks
Date: Mon, 20 Dec 2010 20:03:53 -0800 [thread overview]
Message-ID: <20101220200353.12479178@jbarnes-desktop> (raw)
In-Reply-To: <AANLkTimk6RLkr8Lt76cR8ncLW_3kaX6Dqa+=id9_G-8C@mail.gmail.com>
On Mon, 20 Dec 2010 22:55:46 -0500
Andrew Lutomirski <luto@mit.edu> wrote:
> On Mon, Dec 20, 2010 at 10:47 PM, Keith Packard <keithp@keithp.com> wrote:
> > On Mon, 20 Dec 2010 22:34:12 -0500, Andrew Lutomirski <luto@mit.edu> wrote:
> >
> >> But five seconds is a *long* time, and anything short enough that the
> >> interrupt actually gets turned off in normal use risks the same race.
> >
> > Right, so eliminating any race seems like the basic requirement. Can
> > that be done?
>
> I'll give it a shot.
>
> Do you know if there's an existing tool to call drm_wait_vblank from
> userspace for testing? I know approximately nothing about libdrm or
> any userspace graphics stuff whatsoever.
Yeah, libdrm has a test program called vbltest; it should do what you
need.
--
Jesse Barnes, Intel Open Source Technology Center
prev parent reply other threads:[~2010-12-21 4:03 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-12-20 19:00 [PATCH] drm: Aggressively disable vblanks Andy Lutomirski
2010-12-21 3:23 ` Keith Packard
2010-12-21 3:34 ` [Intel-gfx] " Andrew Lutomirski
2010-12-21 3:47 ` Keith Packard
2010-12-21 3:55 ` Andrew Lutomirski
2010-12-21 4:03 ` Jesse Barnes [this message]
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