R600/Radeon TGSI Shader Cache Gets Closer To Merging

[gsedej]

@tarceri thanks supporting old r600 driver!

Do you think you could also check this r600 issue? It looks like shader color issue on r600. radeonsi (rx480) works fine.

https://bugs.freedesktop.org/show_bug.cgi?id=94008

http://steamcommunity.com/profiles/76561198052496864/screenshots/?appid=323320&sort=newestfirst&browsefilter=myfiles&view=imagewall

[pal666]

What about R600?

i guess its compiler is faster

[duby229]

Yeah I just got my hands on a 5830, I believe it has support for compute shaders in hardware. I'm working on setting up a gentoo build for it now so I will be looking at these patches while I'm at it. Thanks!

EDIT: Despite the low third digit in the model number, it actually performs pretty decent compared to other cards in the 5XXX series.

[Azrael5]

@tarceri thanks supporting old r600 driver!

Do you think you could also check this r600 issue? It looks like shader color issue on r600. radeonsi (rx480) works fine.

https://bugs.freedesktop.org/show_bug.cgi?id=94008

http://steamcommunity.com/profiles/7...view=imagewall

consider that these devices support opengl up to 4.4... so not so old than it is conceivable

[andrei_me]

tarceri will end up spending more time answering questions about the shader cache here instead of working on it haha

[tarceri]

What about R600?

R600 lacks an in memory cache so it's a lot more work. Someone from the community could work on it, but unfortunately that wont be me. On the up side Marek said that the tgsi->binary stage of compilation is fairly fast on r600 so hopefully a tgsi cache will be mostly good enough.

[tarceri]

tarceri will shader cache help with stutters in dota2? Now on radeonsi i have heavy stutters when first loading into the game and sometimes when some skills used first time, etc. Do those stutters mean shaders are compiling/loading?

Users have reported it helping dota2, so yes it should help

[tarceri]

@tarceri thanks supporting old r600 driver!

Do you think you could also check this r600 issue? It looks like shader color issue on r600. radeonsi (rx480) works fine.

https://bugs.freedesktop.org/show_bug.cgi?id=94008

http://steamcommunity.com/profiles/7...view=imagewall

Sorry, I'm not really working on r600. The tgsi cache just happened to be really easy to enable on r600.

[Hi-Angel]

R600 lacks an in memory cache so it's a lot more work.

Please, could you elaborate on this? When a game introduces a shader, r600 compiles it, and keeps in RAM (VRAM?) until the game exits. Or doesn't it? Do I misunderstand something?

[log0]

Please, could you elaborate on this? When a game introduces a shader, r600 compiles it, and keeps in RAM (VRAM?) until the game exits. Or doesn't it? Do I misunderstand something?

RadeonSI memory cache handles shader variants, caches parts that don't change.