RadeonSI Switches To Make Greater Wave64 Use On Navi

[phoronix]

Phoronix: RadeonSI Switches To Make Greater Wave64 Use On Navi

While RDNA/Navi brought Wave32 support, the open-source RadeonSI Gallium3D driver for Linux has decided to switch to make greater use now of Wave64 for more shaders...

http://www.phoronix.com/scan.php?page=news_item&px=RadeonSI-More-Navi-Wave64

[HarlemSquirrel]

Isn't it Wave Race 64?

https://en.m.wikipedia.org/wiki/Wave_Race_64

[schmidtbag]

Isn't it Wave Race 64?
https://en.m.wikipedia.org/wiki/Wave_Race_64

Ah, the theme song to that game was great.

[HarlemSquirrel]

Ah, the theme song to that game was great.

https://youtu.be/e9uvCvvlMn4

[tildearrow]

Isn't it Wave Race 64?
https://en.m.wikipedia.org/wiki/Wave_Race_64

Yeah I think of that game all the time I hear Wave64
Wow you just beat me to it!!!

[andrei_me]

The radeonsi driver is able to switch between Wave32 and Wave64 based on which one of the two options has higher estimated/predicted performance?

Looking at the changes, it seems hardcoded by generation, I forgot what is marek's user here, so I'll ping bridgman instead

[coder]

https://youtu.be/e9uvCvvlMn4

Thanks for sharing, but I find that 64-bit theme to be no match for that of Streets of Rage 2, from the humble Genesis.

OneUp Studios did a very nice arrangement of it, as well as I'm sure many others.

[bridgman]

Looking at the changes, it seems hardcoded by generation, I forgot what is marek's user here, so I'll ping bridgman instead

Navi is the first generation with wave32 support - everything from SI through Vega was wave64 only.

I think Marek's username is "marek".

Is the radeonsi driver able to switch between Wave32 and Wave64 based on which one of the two options has higher estimated/predicted performance?

The current logic can choose wave32 or wave64 for each shader type, ie pixel/fragment can be set differently from vertex, compute etc...

[coder]

Navi is the first generation with wave32 support - everything from SI through Vega was wave64 only.

Has AMD made any commitment to support Wave64 in future generations of consumer/gaming GPUs?

I was under the impression that its inclusion in Navi was merely transitional. Can you say, one way or the other?