Intel Iris Gallium3D Picks Up More Game Performance Optimizations For Mesa 19.1

[phoronix]

Phoronix: Intel Iris Gallium3D Picks Up More Game Performance Optimizations For Mesa 19.1

There is just one week to go until the Mesa 19.1 feature freeze and branching for this next quarterly feature update to these open-source OpenGL/Vulkan Linux drivers. Notable this round is the introduction of the Intel "Iris" Gallium3D driver for supporting Broadwell graphics and newer atop this next-gen OpenGL driver ahead of next year's Xe Graphics dGPU launch. With days to go until the Mesa 19.1 feature freeze, more performance optimizations have landed...

http://www.phoronix.com/scan.php?page=news_item&px=More-Iris-Perf-Before-19.1

[tildearrow]

Typo:

in the case of Shadow of Mordor the peak FPS imprves by as much as 83%.

[oibaf]

This commit message is likely wrong, as the max of first two games are bigger than their average...: https://cgit.freedesktop.org/mesa/me...9d0cf1bbecdd46

-----------------------------------------------
| DiRT Rally | +25% (avg) | +17% (max) |
| Bioshock Infinite | +22% (avg) | +11% (max) |
| Shadow of Mordor | +27% (avg) | +83% (max) |
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[leonmaxx]

-----------------------------------------------
| DiRT Rally | +25% (avg) | +17% (max) |
-----------------------------------------------

Avg. FPS improved by 25%, and Max FPS improved by 17%, it's correct.

[andrei_me]

This commit message is likely wrong, as the max of first two games are bigger than their average...: https://cgit.freedesktop.org/mesa/me...9d0cf1bbecdd46

-----------------------------------------------
| DiRT Rally | +25% (avg) | +17% (max) |
| Bioshock Infinite | +22% (avg) | +11% (max) |
| Shadow of Mordor | +27% (avg) | +83% (max) |
-----------------------------------------------

It is like the following:

40 avg, 60 max => 50 avg, 70 max

[Kayden]

Yeah, normally I only mention the % improvement in the average FPS from the game's benchmark mode. But in a few cases, like Shadow of Mordor, it was clearly removing a bottleneck from certain scenes, allowing the maximum to increase a lot. So I included both.

[oibaf]

Thanks for the clarification!

[smitty3268]

Kayden, is iris in good condition for general use at this point, or is it still considered experimental? Does it pass piglit and conformance tests?

[oibaf]

And you should also add iris to features.txt :

https://cgit.freedesktop.org/mesa/mesa/tree/docs/features.txt

[Kayden]

Kayden, is iris in good condition for general use at this point, or is it still considered experimental? Does it pass piglit and conformance tests?

A lot of people have been asking me about this lately, so I tried to write up some stuff here:
Iris Status (Gitlab)

TL;DR

We're passing most of the tests (but not fully conformant yet), and a lot of games are working well. Performance is pretty decent - a bunch of things are 15% faster than i965, but other things are still slower. Some minor features are missing still. It's pretty usable if you're an adventurous user, and I would be happy to take bug reports on Bugzilla (Drivers/Gallium/Iris). I would not advise shipping it by default yet.