Radeon X.Org Driver Gets Fixed Up To Always Allow Page-Flipping With TearFree

[gsedej]

Everyone thanks for replying and adding info. I added few more things. Maybe I should post this in the thread mentiond by pq1930562 . Would like to get confirmation, before posting...

bridgman thanks for replying. How many people were working on opensource vega driver? By reading phoronix, only few are mentioned regulary (mareko, agd5f, you,...)?

About Playstaion gpu - it should be GCN similar to radeon HD 7870, gcn 1.0. Is this correct? How about PS4-pro and new xbox - I read that microsoft designed much stronger Polaris chip with 40 CU
Also, are AMD people restricted talking about chips that are made for parthers (xbox/ps)?


Anyway the new table.

GFX index	Fab	GCN name1	GCN name2	short Name	island name	asic names	»series«	some models	APU / CPU
GFX6	28 nm	GCN1	GCN 1.0	SI	Southern Islands	Oland Cape Verde Pitcairn Tahiti	HD 7000	HD 7770, HD 7990, R7 250, R9 270, R9 370, R7 450
GFX7	28 nm	GCN2	GCN 1.1	CIK	Sea Islands	Bonaire Hawaii	200	HD 7790, HD 8770, R7 260 R9 290, R7 360, R9 390, R7 455	Kaveri / Steamroller
GFX8	28 nm	GCN3	GCN 1.2	VI	Volcanic Islands	Tonga, Fiji, Bonarie, Kabini	300	R9 285, R9 380, R9 FURY, R9 nano	Carrizo / Excavator
GFX8	14 nm	GCN4	GCN 1.3		Arctic Islands	Polaris (10, 11, 20, 21)	400	Polaris 10 (RX 480, RX 470), Polaris 11 (RX 460), polaris 20 (RX 580), polaris 21 (rx 560)	Bristol Ridge / Excavator
GFX9	14 nm	GCN5	GCN 1.4		Arctic Islands	Vega, Raven	vega	Vega 64, Vega 56	Raven Ridge / Zen

[leipero]

Without more information about what you're doing that's "smoother and better", my guess would be it's because with EXA you only get horizontal tearing, whereas with glamor you get diagonal one, which is much more noticeable and annoying.

However, no tearing at all is even better than horizontal tearing. That's where TearFree comes in.

To be honest I do not mind tearing at all, especially at above 85Hz, it doesn't bother me, what does bother me is "microstutter", and all those techniques introduce it. For example, when you use vblank, and watch 23-30FPS video on 85+Hz display, you (or at least me lol) can notice that not all frames are presented with "same latency", so maybe 10 frames, or even 280 frames would be presented in similar latency between them, but every so often there would be a frame that would get maybe double the latency of "normal continuity" of other frames, that is something that for some reason brutally annoys me, I can't even describe how much it annoys me , and that is not teh case only on specific GPU's, CPU's and OS's, it's everywhere. So, solution is to disable vblank and just accept tear line appearing from time to time.

Hope I did not managed to confuse you even more, but did clarify what i mean by "smoother and better", I might try TearFree again, but there's anotehr reason why i use DRI2, it's not X.Org related, but mutter related .

[bridgman]

and does this effort pay out for amd?

I think so. Getting started earlier allowed us to have drivers upstream before launch despite the size of the work required, and that in turn put us in better shape for Raven.

Testing on the emulator also helped us to be ready for silicon bringup and find HW issues during the narrow window between A0 silicon back and design freeze for A1 silicon (which is what actually shipped).

We didn't get far enough on the emulator with Vega10 to find and fix HW issues before A0 taped out, but I am trying to do that for the chips being worked on now.

[Jumbotron]

Everyone thanks for replying and adding info. I added few more things. Maybe I should post this in the thread mentiond by pq1930562 . Would like to get confirmation, before posting...

bridgman thanks for replying. How many people were working on opensource vega driver? By reading phoronix, only few are mentioned regulary (mareko, agd5f, you,...)?

About Playstaion gpu - it should be GCN similar to radeon HD 7870, gcn 1.0. Is this correct? How about PS4-pro and new xbox - I read that microsoft designed much stronger Polaris chip with 40 CU
Also, are AMD people restricted talking about chips that are made for parthers (xbox/ps)?


Anyway the new table.

GFX index	Fab	GCN name1	GCN name2	short Name	island name	asic names	»series«	some models	APU / CPU
GFX6	28 nm	GCN1	GCN 1.0	SI	Southern Islands	Oland Cape Verde Pitcairn Tahiti	HD 7000	HD 7770, HD 7990, R7 250, R9 270, R9 370, R7 450
GFX7	28 nm	GCN2	GCN 1.1	CIK	Sea Islands	Bonaire Hawaii	200	HD 7790, HD 8770, R7 260 R9 290, R7 360, R9 390, R7 455	Kaveri / Steamroller
GFX8	28 nm	GCN3	GCN 1.2	VI	Volcanic Islands	Tonga, Fiji, Bonarie, Kabini	300	R9 285, R9 380, R9 FURY, R9 nano	Carrizo / Excavator
GFX8	14 nm	GCN4	GCN 1.3		Arctic Islands	Polaris (10, 11, 20, 21)	400	Polaris 10 (RX 480, RX 470), Polaris 11 (RX 460), polaris 20 (RX 580), polaris 21 (rx 560)	Bristol Ridge / Excavator
GFX9	14 nm	GCN5	GCN 1.4		Arctic Islands	Vega, Raven	vega	Vega 64, Vega 56	Raven Ridge / Zen

Thanks for making the APU generation matchup clearer than mine. But one correction I believe. The Bristol Ridge APU which is the process upgrade of Carrizo is a GCN 1.2 part NOT GCN 1.3. In other words....the integrated GPU in Bristol Ridge has some elements of Volcanic Islands' Tonga and Fiji. To the best of my knowledge ( and Bridgman can better confirm this ) Polaris tech GCN 1.3 is NOT part of Bristol Ridge. Bristol Ridge is just a process upgrade in order to get higher speeds but better power maintenance. Simply put it is a turbo charged Carrizo. Also...it is NOT a 14nm part but 28 nm same as Carrizo. Raven Ridge is the first 14nm APU based on Zen of course.

Also...it seems that AMD is going to fill out its CPU lineup this fall and winter by re-releasing Bristol Ridge APU's specifically for Desktops. I've got an HP desktop with a Bristol Ridge APU and it is VERY zippy ! So is my Lenovo Ideapad Laptop with a Bristol Ridge APU.

[bridgman]

Thanks for making the APU generation matchup clearer than mine. But one correction I believe. The Bristol Ridge APU which is the process upgrade of Carrizo is a GCN 1.2 part NOT GCN 1.3. In other words....the integrated GPU in Bristol Ridge has some elements of Volcanic Islands' Tonga and Fiji.

Correct - Bristol Ridge / Excavator should be up a row, along with Stoney Ridge.

BTW gsedej the GCN 1.x terminology started fading out after 1.2 IIRC, don't think it was used much after that, so GCN 1.3 / 1.4 should probably be blanked or greyed or N/A'ed...

Also Kabini, Mullins/Beema and Carrizo-L are GFX7 APUs - Kabini is currently in the GFX8 area of your table. Probably makes the most sense to merge your APU/CPU column contents into the "asic names" column, since Kaveri / Bristol etc.. are chip names while the product names are more like A10-7850.

Finally the whole "islands" thing gets blurry once we get into Vega territory - in most cases AI refers to Polaris but not to Vega.

[franglais125]

Everyone thanks for replying and adding info. I added few more things.

Thanks a LOT for this. I have been trying to have a concise way of visualize it to have a better understanding. Bookmarked .

[bridgman]

About Playstaion gpu - it should be GCN similar to radeon HD 7870, gcn 1.0. Is this correct? How about PS4-pro and new xbox - I read that microsoft designed much stronger Polaris chip with 40 CU

Please see answer to next question.

Also, are AMD people restricted talking about chips that are made for parthers (xbox/ps)?

Yes, not only outside the company but even inside engineering we have hard NDA walls around semi-custom partner projects. Everything is code-named and most people outside the NDA wall don't even hear the code names.

So no, I won't be answering any game console questions here. And no we will not be publicly releasing Linux drivers for them either

[faph]

gsedej franglais125 bridgman guys, ever heard of Wikipedia? There is
List of AMD graphics processing units
and
List of AMD accelerated processing unit microprocessors

hth...

[franglais125]

guys, ever heard of Wikipedia? There is
List of AMD graphics processing units
and
List of AMD accelerated processing unit microprocessors

hth...

Yes, i tried this before. But, as I said in a previous comment, what I like about that table is that it's **concise**. If I had to print out the wikipedia article, it would take 10+ pages.

[pq1930562]

About Playstaion gpu - it should be GCN similar to radeon HD 7870, gcn 1.0. Is this correct?

According to the video in http://www.phoronix.com/scan.php?pag...Radeon-G3D-PS4 , it's "Bonaire".

So no, I won't be answering any game console questions here. And no we will not be publicly releasing Linux drivers for them either

Looks like you already have:

http://www.phoronix.com/scan.php?page=news_item&px=PlayStation4-Vulkan-AMDGPU

?