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

[zman0900]

Does the amdgpu ddx support this already, or will it be fixed too? Or is there some equivalent to TearFree for the modesetting ddx?

[okias]

video-ati gives better performance (FPS in glxgears), I find DRI2 with EXA to be much smoother and better when vblank is disabled.

Yes, these days numbers which comes out of glxgears has minimal value in term of performance, because it's not benchmark. It's mostly utility to test, that basic driver functionality is working.

[gsedej]

agd5f , bridgman thanks for answers!
Just wanted to mention that the RadeonFeature is great and I was using it in the past, but it's not very well updated for the current models and "market" names...

Where are the biggest differences? According to linux user-space driver r600 (pre-gcn) and radeonsi (gcn) is the biggest. The Vega does not feel so big difference, since the opensource driver was better than -PRO on day1 of release? Also Polaris was quite quick. So the biggest differences were before polaris

so I compiled a list, the info i found on previous posts and the wikipedia, Please correct if not right.

GFX index	Fab	GCN name1	GCN name2	island name	core names	»series«	some models
GFX6	28 nm	GCN1	?	Southern Islands	Oland Cape Verde Pitcairn Tahiti	HD 7000	HD 7770, HD 7990, R7 250, R9 270, R9 370, R7 450 Playstation 4 ? Xbox One ?
GFX7	28 nm	GCN2	GCN 1.2	Sea Islands	Bonaire Hawaii	200	HD 7790, HD 8770, R7 260 R9 290, R7 360, R9 390, R7 455
GFX8	28 nm	GCN3	GCN 1.3	Volcanic Islands	Tonga, Fiji	300	R9 285, R9 380, R9 FURY, R9 nano
GFX9	14 nm	GCN4	?	Arctic Islands	Polaris	400	Polaris 10 (RX 480, RX 470), Polaris 11 (RX 460), polaris 20 (RX 580), polaris 21 (rx 560)
?	14 nm	GCN5	?	Vega	Vega	vega	Vega 64, Vega 56
?	7 nm?	GCN6 ?	?	Navi	N/A	N/A	N/A

[agd5f]

agd5f , bridgman thanks for answers!
Just wanted to mention that the RadeonFeature is great and I was using it in the past, but it's not very well updated for the current models and "market" names...

Where are the biggest differences? According to linux user-space driver r600 (pre-gcn) and radeonsi (gcn) is the biggest. The Vega does not feel so big difference, since the opensource driver was better than -PRO on day1 of release? Also Polaris was quite quick. So the biggest differences were before polaris

so I compiled a list, the info i found on previous posts and the wikipedia, Please correct if not right.

Not quite. maybe something like:

GFX index	Fab	GCN name1	GCN name2	island name	asic names	»series«	some models
GFX6	28 nm	GCN1	GCN 1.0	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	Sea Islands	Bonaire Hawaii	200	HD 7790, HD 8770, R7 260 R9 290, R7 360, R9 390, R7 455
GFX8	28 nm	GCN3	GCN 1.2	Volcanic Islands	Tonga, Fiji	300	R9 285, R9 380, R9 FURY, R9 nano
GFX8	14 nm	GCN4	GCN1.3	Arctic Islands	Polaris	400	Polaris 10 (RX 480, RX 470), Polaris 11 (RX 460), polaris 20 (RX 580), polaris 21 (rx 560)
GFX9	14 nm	GCN5	GCN 1.4	Arctic Islands	Vega	vega	Vega 64, Vega 56

[agd5f]

Does the amdgpu ddx support this already, or will it be fixed too? Or is there some equivalent to TearFree for the modesetting ddx?

amdgpu ddx has the same feature set as radeon. The patches will land there as well. modesetting ddx does not support this feature.

[bridgman]

Where are the biggest differences? According to linux user-space driver r600 (pre-gcn) and radeonsi (gcn) is the biggest. The Vega does not feel so big difference, since the opensource driver was better than -PRO on day1 of release? Also Polaris was quite quick. So the biggest differences were before polaris

The differences in the userspace driver were smaller than the architecture breaks at r600 and GCN, but the differences in the kernel driver were bigger than the userspace changes. Vega was the first chip ever where we started coding and testing Linux drivers on the emulator, months before first silicon - we started earlier and had more people working on the open source drivers than any chip I remember.

IIRC it took ~2 years after r600 launch for initial open source driver support with 3D acceleration, and at least a year after launch for GCN.

[Jumbotron]

Not quite. maybe something like:

GFX index	Fab	GCN name1	GCN name2	island name	asic names	»series«	some models
GFX6	28 nm	GCN1	GCN 1.0	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	Sea Islands	Bonaire Hawaii	200	HD 7790, HD 8770, R7 260 R9 290, R7 360, R9 390, R7 455
GFX8	28 nm	GCN3	GCN 1.2	Volcanic Islands	Tonga, Fiji	300	R9 285, R9 380, R9 FURY, R9 nano
GFX8	14 nm	GCN4	GCN1.3	Arctic Islands	Polaris	400	Polaris 10 (RX 480, RX 470), Polaris 11 (RX 460), polaris 20 (RX 580), polaris 21 (rx 560)
GFX9	14 nm	GCN5	GCN 1.4	Arctic Islands	Vega	vega	Vega 64, Vega 56

Just to update to include AMD APUs


GFX Index FAB GCN Name 1 GCN Name 2 APU Name CPU Architecture Platform

GFX 7 28nm GCN 2 GCN 1.1 Kaveri Steamroller Desktop/Mobile

GFX 8 28nm GCN 3 GCN 1.2 Carrizo Excavator Desktop/Mobile

GFX 8 28nm GCN 3 GCN 1.2 Bristol Ridge Excavator Desktop/Mobile

GFX 9 14nm GCN 5 GCN 1.4 Raven Ridge Zen Desktop/Mobile



GFX 7 28 nm GCN 2 GCN 1.1 Kabini / Tamash Jaguar Ultra Mobile

GFX 7 28 nm GCN 2 GCN 1.1 Beema / Mullins Puma Ultra Mobile

GFX 7 28 nm GCN 2 GCN 1.1 Carrizo-L Puma + Ultra Mobile

GFX 8 28 nm GCN 3 GCN 1.2 Stoney Ridge Excavator Ultra Mobile

[Jumbotron]

Sorry....don't know how to fix the formatting. Hopefully you all can figure the chart out.

[pq1930562]

There's already a thread for the names, see:

https://www.phoronix.com/forums/forum/linux-graphics-x-org-drivers/open-source-amd-linux/943751-gcn-renamed-to-gfx

[MrCooper]

[...] even tho DRI3 on video-ati gives better performance (FPS in glxgears), I find DRI2 with EXA to be much smoother and better when vblank is disabled.

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.