AMD's Marek Has A Patch Helping To Reduce Gallium3D Input Lag

[phoronix]

Phoronix: AMD's Marek Has A Patch Helping To Reduce Gallium3D Input Lag

In addition to the work this week on exposing EXT_gpu_shader4 / EXT_texture_buffer_object, well known AMD open-source developer Marek Olšák has also been working a patch to help lower the input lag with Mesa...

http://www.phoronix.com/scan.php?page=news_item&px=ST-Mesa-Marek-Lower-Input-Lag

[ernstp]

Cool! This is an area where Mesa has been lagging... (Haha). Could there be tuneables? Metrics that you could turn on?

[davidbepo]

nice to see this, also the fact that it affects all gallium drivers is extra nice

[tildearrow]

Awesome! I really hope it fixes this VSync miscompliance:

[aufkrawall]

Input lag is so terrible, a relief that people in the Linux world care about it.

[ms178]

Input lag is so terrible, a relief that people in the Linux world care about it.

Google's Stadia and the whole Linux gaming crowd are surely interested in any latency / input lag advancements on Linux. And as it gets more popular it should be also getting more attention for optimizations.

[andrei_me]

marek what is input lag in this context? As you cited Unigine Heaven example, is there any input in the sense of moving the camera around with the mouse/cursor, is this kind of input lag the patches tries to fix?

[Jabberwocky]

Thanks, the work here is much appreciated and valued!

I wonder how this would be tested (to validate changes and avoid regressions)

[marek]

marek what is input lag in this context? As you cited Unigine Heaven example, is there any input in the sense of moving the camera around with the mouse/cursor, is this kind of input lag the patches tries to fix?

The lag is the time interval between the time you physically move the mouse with your hand and the time you see the effect on the screen (such as rotation of the camera view in Heaven).

[marek]

AMD has no money for a 4K monitor, weird.
https://lists.freedesktop.org/archiv...il/218481.html

"I don't have a 4K monitor"

I could get 4K if I wanted to. I'm happy with 1440p though.