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From: "Keith Packard" <keithp-aN4HjG94KOLQT0dZR+AlfA@public.gmane.org>
To: "Michel Dänzer" <michel-otUistvHUpPR7s880joybQ@public.gmane.org>,
	"Christian König" <christian.koenig-5C7GfCeVMHo@public.gmane.org>,
	"Manasi Navare"
	<manasi.d.navare-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
	"Harry Wentland" <harry.wentland-5C7GfCeVMHo@public.gmane.org>
Cc: "Nicolai Hähnle" <nicolai.haehnle-5C7GfCeVMHo@public.gmane.org>,
	"Daniel Vetter" <daniel.vetter-/w4YWyX8dFk@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>
Subject: Re: RFC for a render API to support adaptive sync and VRR
Date: Tue, 17 Apr 2018 20:58:50 -0700	[thread overview]
Message-ID: <87o9ihyxl1.fsf@keithp.com> (raw)
In-Reply-To: <b75e31f7-ce59-de97-5445-cb4c03ff7336-otUistvHUpPR7s880joybQ@public.gmane.org>


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Michel Dänzer <michel-otUistvHUpPR7s880joybQ@public.gmane.org> writes:

> Time-based presentation seems to be the right approach for preventing
> micro-stutter in games as well, Croteam developers have been researching
> this.

Both the Vulkan GOOGLE_display_timing extension and X11 Present
extension offer the ability to specify the desired display time in
seconds.

Similarly, I'd suggest that the min/max display refresh rate values be
advertised as time between frames rather than frames per second.

I'd also encourage using a single unit for all of these values,
preferably nanoseconds. Absolute times should all be referenced to
CLOCK_MONOTONIC.

-- 
-keith

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  parent reply	other threads:[~2018-04-18  3:58 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 [this message]
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
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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