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From: Eric Anholt <eric@anholt.net>
To: "Imre Deak" <imre.deak@intel.com>,
	"Daniel Vetter" <daniel.vetter@ffwll.ch>,
	"Chris Wilson" <chris@chris-wilson.co.uk>,
	"Kristian Høgsberg" <krh@bitplanet.net>
Cc: intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org
Subject: Re: [RFC 0/4] drm: add raw monotonic timestamp support
Date: Fri, 05 Oct 2012 16:07:09 -0700	[thread overview]
Message-ID: <87ehlcmsbm.fsf@eliezer.anholt.net> (raw)
In-Reply-To: <1349444222-22274-1-git-send-email-imre.deak@intel.com>


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Imre Deak <imre.deak@intel.com> writes:

> This is needed to make applications depending on vblank/page flip
> timestamps independent of time ajdustments.
>
> I've tested these with an updated intel-gpu-test/flip_test and will send
> the update for that once there's no objection about this patchset.
>
> The patchset is based on danvet's dinq branch with the following
> additional patches from the intel-gfx ML applied: 
>     drm/i915: paper over a pipe-enable vs pageflip race
>     drm/i915: don't frob the vblank ts in finish_page_flip
>     drm/i915: call drm_handle_vblank before finish_page_flip

While people are in pageflip code:

It would be really, really cool for application tracing if we could get
timestamps out of our swaps that used the TIMESTAMP register that is the
timer used for event tracing on the GPU using GL_ARB_timer_query.  Then
you could get decent visualizations of the latency of your rendering.

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  parent reply	other threads:[~2012-10-05 23:07 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-10-05 13:36 [RFC 0/4] drm: add raw monotonic timestamp support Imre Deak
2012-10-05 13:36 ` [RFC 1/4] time: export getnstime_raw_and_real for DRM Imre Deak
2012-10-05 16:14   ` Kristian Høgsberg
2012-10-09 10:25     ` Imre Deak
2012-10-05 13:37 ` [RFC 2/4] drm: make memset/calloc for _vblank_time more robust Imre Deak
2012-10-05 13:37 ` [RFC 3/4] drm: use raw time in drm_calc_vbltimestamp_from_scanoutpos Imre Deak
2012-10-05 13:37 ` [RFC 4/4] drm: add support for raw monotonic vblank timestamps Imre Deak
2012-10-05 13:55   ` Michel Dänzer
2012-10-05 13:59     ` Imre Deak
2012-10-05 14:14       ` Michel Dänzer
2012-10-05 14:21         ` Imre Deak
2012-10-05 22:18   ` Rob Clark
2012-10-05 23:41     ` Imre Deak
2012-10-06  0:09       ` Rob Clark
2012-10-06  0:49         ` Imre Deak
2012-10-07 20:33           ` Daniel Vetter
2012-10-05 23:07 ` Eric Anholt [this message]
2012-10-08 11:22   ` [RFC 0/4] drm: add raw monotonic timestamp support Imre Deak
2012-10-11 10:29 ` Laurent Pinchart
2012-10-11 11:21   ` Imre Deak
2012-10-11 10:32 ` Laurent Pinchart
2012-10-11 11:22   ` Imre Deak
2012-10-23 18:53 ` [PATCH 0/2] drm: add " Imre Deak
2012-10-23 18:53 ` [PATCH 1/2] drm: use monotonic time in drm_calc_vbltimestamp_from_scanoutpos Imre Deak
2012-10-24 23:05   ` Mario Kleiner
2012-10-25 10:28     ` Imre Deak
2012-10-25 19:45       ` Mario Kleiner
2012-10-23 18:53 ` [PATCH 2/2] drm: add support for monotonic vblank timestamps Imre Deak
2012-10-24  8:08   ` Michel Dänzer
2012-10-24 11:40     ` Imre Deak

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