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From: Daniel Stone <daniel-rLtY4a/8tF1rovVCs/uTlw@public.gmane.org>
To: Manasi Navare <manasi.d.navare-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Cc: "Keith Packard" <keithp-aN4HjG94KOLQT0dZR+AlfA@public.gmane.org>,
	"Nicolai Hähnle" <nicolai.haehnle-5C7GfCeVMHo@public.gmane.org>,
	"Daniel Vetter" <daniel.vetter-/w4YWyX8dFk@public.gmane.org>,
	"Michel Dänzer" <michel-otUistvHUpPR7s880joybQ@public.gmane.org>,
	"Michel Dänzer" <michel.daenzer-5C7GfCeVMHo@public.gmane.org>,
	dri-devel
	<dri-devel-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org>,
	"amd-gfx mailing list"
	<amd-gfx-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org>,
	"Deucher,
	Alexander" <Alexander.Deucher-5C7GfCeVMHo@public.gmane.org>,
	"Christian König" <christian.koenig-5C7GfCeVMHo@public.gmane.org>
Subject: Re: RFC for a render API to support adaptive sync and VRR
Date: Sat, 21 Apr 2018 11:30:00 +0100	[thread overview]
Message-ID: <CAPj87rOgShQ1P0OP=0apgZ10oyXHT68JOP+o2XWpctQnnkmM_g@mail.gmail.com> (raw)
In-Reply-To: <20180420203240.GA9472-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>

Hi,

On 20 April 2018 at 21:32, Manasi Navare <manasi.d.navare@intel.com> wrote:
> On Wed, Apr 18, 2018 at 09:39:02AM +0200, Daniel Vetter wrote:
>> On Wed, Apr 18, 2018 at 5:58 AM, Keith Packard <keithp@keithp.com> wrote:
>> > I'd also encourage using a single unit for all of these values,
>> > preferably nanoseconds. Absolute times should all be referenced to
>> > CLOCK_MONOTONIC.
>>
>> +1 on everything Keith said. I got somehow dragged in khr vk
>> discussions around preventing micro-stuttering, and consensus seems to
>> be that timestamps for scheduling frames is the way to go, most likely
>> absolute ones (not everything is running Linux unfortunately, so can't
>> go outright and claim it's guaranteed to be CLOCK_MONOTONIC).
>
> And yes I also got consensus from Mesa and media folks about using the
> absolute timestamp for scheduling the frames and then the driver will
> modify the vblank logic to "present no earlier than the timestamp"

Whilst we're all piling in, here's another AOL. We didn't yet
implement this for Wayland because of the fun involved in adding a
FIFO mode to a very mailbox window system, but at some point we'll
have to suck it up and push it.

Cheers,
Daniel
_______________________________________________
amd-gfx mailing list
amd-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/amd-gfx

  parent reply	other threads:[~2018-04-21 10:30 UTC|newest]

Thread overview: 43+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-04-09 19:56 RFC for a render API to support adaptive sync and VRR Harry Wentland
     [not found] ` <c79421ce-9408-5cd6-5de3-0fa521146e4b-5C7GfCeVMHo@public.gmane.org>
2018-04-09 20:00   ` Harry Wentland
     [not found]     ` <435ebd04-0435-5a6a-9f1e-e4c4fc629aa9-5C7GfCeVMHo@public.gmane.org>
2018-04-09 21:45       ` Manasi Navare
     [not found]         ` <20180409214554.GB13967-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2018-04-10  6:45           ` Christian König
2018-04-10  7:37             ` Michel Dänzer
     [not found]               ` <b75e31f7-ce59-de97-5445-cb4c03ff7336-otUistvHUpPR7s880joybQ@public.gmane.org>
2018-04-10 15:08                 ` Harry Wentland
     [not found]                   ` <ae9992e5-43ab-9636-13e1-8a5c692480b5-5C7GfCeVMHo@public.gmane.org>
2018-04-10 15:28                     ` Christian König
2018-04-10 15:35                     ` Cyr, Aric
2018-04-10 15:43                       ` Christian König
     [not found]                         ` <fc53ce53-f02c-891d-4aa5-e9a11cbe3007-5C7GfCeVMHo@public.gmane.org>
2018-04-10 16:26                           ` Cyr, Aric
     [not found]                             ` <MWHPR12MB1837488A047C03E955282A4182BE0-Gy0DoCVfaSXe1Hf+mWOIywdYzm3356FpvxpqHgZTriW3zl9H0oFU5g@public.gmane.org>
2018-04-10 16:37                               ` Nicolai Hähnle
     [not found]                                 ` <54baa87e-33a9-bd69-a309-d61176eb4e8d-5C7GfCeVMHo@public.gmane.org>
2018-04-10 17:52                                   ` Harry Wentland
     [not found]                             ` <063d6dff-2b97-ef01-12bb-8a24125a58ec@daenzer.net>
2018-04-10 17:13                               ` Cyr, Aric
     [not found]                                 ` <65006f34-39b9-5aca-e0c0-77a591b69c3a@daenzer.net>
     [not found]                                   ` <65006f34-39b9-5aca-e0c0-77a591b69c3a-otUistvHUpPR7s880joybQ@public.gmane.org>
2018-04-10 17:25                                     ` Cyr, Aric
     [not found]                                       ` <f85e3590-b283-843b-12d0-5f6f0c4c0952@amd.com>
2018-04-10 21:45                                         ` Cyr, Aric
2018-04-11  6:57                                           ` Nicolai Hähnle
     [not found]                                             ` <72c1d357-db72-b181-9421-04f99b3bbf2f-5C7GfCeVMHo@public.gmane.org>
2018-04-11  9:50                                               ` Michel Dänzer
     [not found]                                                 ` <2005817c-09c0-aebe-bb96-9e22d6f16df5-otUistvHUpPR7s880joybQ@public.gmane.org>
2018-04-11 23:30                                                   ` Cyr, Aric
     [not found]                                                     ` <MWHPR12MB1837F8120B126FA3A4CE899982BD0-Gy0DoCVfaSXe1Hf+mWOIywdYzm3356FpvxpqHgZTriW3zl9H0oFU5g@public.gmane.org>
2018-04-12  8:48                                                       ` Michel Dänzer
2018-04-12 11:39                                                     ` Nicolai Hähnle
     [not found]                                                       ` <a5b5c31f-e7c5-8ae0-1239-06bfa86b939b-5C7GfCeVMHo@public.gmane.org>
2018-04-12 14:57                                                         ` Michel Dänzer
2018-04-12 17:39                                                         ` Harry Wentland
2018-04-11 10:28                                       ` Michel Dänzer
2018-04-11 15:45                             ` Michel Dänzer
     [not found]                       ` <MWHPR12MB1837C57016A470A5199E855282BE0-Gy0DoCVfaSXe1Hf+mWOIywdYzm3356FpvxpqHgZTriW3zl9H0oFU5g@public.gmane.org>
2018-04-10 17:13                         ` Michel Dänzer
2018-04-12 21:38                 ` Stéphane Marchesin
2018-04-13 19:24                   ` Harry Wentland
2018-04-18  3:58                 ` Keith Packard
2018-04-18  7:39                   ` Daniel Vetter
2018-04-20 20:32                     ` Manasi Navare
     [not found]                       ` <20180420203240.GA9472-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2018-04-21 10:30                         ` Daniel Stone [this message]
2018-04-23 14:40                         ` Harry Wentland
2018-04-23 21:19                           ` Manasi Navare
     [not found]                             ` <20180423211944.GC9472-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2018-04-24 12:09                               ` Daniel Vetter
2018-04-24 14:20                                 ` Cyr, Aric
     [not found]                                 ` <20180424120946.GW31310-dv86pmgwkMBes7Z6vYuT8azUEOm+Xw19@public.gmane.org>
2018-04-24 14:28                                   ` Harry Wentland
     [not found]                                     ` <b9c33eeb-1db8-f782-cfbe-411d94fecb67-5C7GfCeVMHo@public.gmane.org>
2018-04-24 21:57                                       ` Daniel Vetter
     [not found]                                         ` <CAKMK7uHzLRUwZSFbMb4qDzXBODVSQVTTw6BxgmvJdES4gJmBDg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2018-08-17 10:20                                           ` Ernst Sjöstrand
2018-04-10 15:03           ` Harry Wentland
2018-04-10 21:36             ` Manasi Navare
2018-04-10 22:00               ` Cyr, Aric
2018-04-13 16:04       ` Daniel Vetter
     [not found]         ` <20180413160453.GC31310-dv86pmgwkMBes7Z6vYuT8azUEOm+Xw19@public.gmane.org>
2018-04-13 19:20           ` Harry Wentland

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