Re: [igt-dev] [PATCH i-g-t] kms_fence_pin_leak: check for availabile fences

From: "Ville Syrjälä" <ville.syrjala@linux.intel.com>
To: Ramalingam C <ramalingam.c@intel.com>
Cc: igt-dev@lists.freedesktop.org
Subject: Re: [igt-dev] [PATCH i-g-t] kms_fence_pin_leak: check for availabile fences
Date: Fri, 7 Feb 2020 16:08:29 +0200	[thread overview]
Message-ID: <20200207140829.GZ13686@intel.com> (raw)
In-Reply-To: <20200207135605.GC11460@intel.com>

On Fri, Feb 07, 2020 at 07:26:06PM +0530, Ramalingam C wrote:
> On 2020-02-06 at 21:26:52 -0800, Ashutosh Dixit wrote:
> > Need fences to leak fences.
> > 
> > Signed-off-by: Ashutosh Dixit <ashutosh.dixit@intel.com>
> > ---
> >  tests/kms_fence_pin_leak.c | 1 +
> >  1 file changed, 1 insertion(+)
> > 
> > diff --git a/tests/kms_fence_pin_leak.c b/tests/kms_fence_pin_leak.c
> > index 8c9e10a56..1ac65e8a1 100644
> > --- a/tests/kms_fence_pin_leak.c
> > +++ b/tests/kms_fence_pin_leak.c
> > @@ -200,6 +200,7 @@ igt_simple_main
> >  
> >  	data.drm_fd = drm_open_driver_master(DRIVER_INTEL);
> >  	igt_require_gem(data.drm_fd);
> > +	igt_require(gem_available_fences(data.drm_fd) > 0);
> >From documentation, seams this gem_available_fences is Only relevant for pre-gen4.
> after the gen4 we dont use the fences or we can't use this method to get the fence
> count?

These days it just returns the total number of fences, so should work
on everything. There used to be a way userspace could reserve some
fences for itself (I think for UMS). I believe that's what the
documentation  is referring to. That stuff got removed years ago.

-- 
Ville Syrjälä
Intel
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