OpenSWR Improvements Land In Mesa

[phoronix]

Phoronix: OpenSWR Improvements Land In Mesa

OpenSWR, the new high performance software rasterizer developed by Intel and leveraging LLVM within Mesa, saw a slew of commits today...

http://www.phoronix.com/scan.php?page=news_item&px=OpenSWR-Improvements-Mesa

[Pontostroy]

[FONT=monospace][COLOR=#000000]OpenGL vendor string: Intel Corporation [/COLOR]
OpenGL renderer string: Gallium 0.4 on SWR
OpenGL core profile version string: 3.3 (Core Profile) Mesa 11.3.0-devel (git-8683d54 pontostroy:X11)
OpenGL core profile shading language version string: 3.30
OpenGL core profile context flags: (none)
OpenGL core profile profile mask: core profile[/FONT]

glxinfo and glxgears work fine, but any other applications won't start

[gsedej]

Please benchmark swrast, llvmpipe, openswr
on different cpus:
-raspberry1 singlecore
-raspberry3 4core
-core2duo 2core
-i5 2core +2 threads
-i7 many cores and threads

[Kemosabe]

Please benchmark swrast, llvmpipe, openswr
on different cpus:
-raspberry1 singlecore
-raspberry3 4core
-core2duo 2core
-i5 2core +2 threads
-i7 many cores and threads

Lol, raspberry vs Intel ... Michael, replace it with AMD please.

[Tomin]

Please benchmark swrast, llvmpipe, openswr
on different cpus:
-raspberry1 singlecore
-raspberry3 4core

I suspect that OpenSWR doesn't run on anything else than x86 CPUs, because it depends on some instructions (SSE and/or AVX(2), I think) that aren't available on other ISAs. The others are probably working though, but they are painfully slow on those platforms.

[Michael]

Please benchmark swrast, llvmpipe, openswr
on different cpus:
-raspberry1 singlecore
-raspberry3 4core
-core2duo 2core
-i5 2core +2 threads
-i7 many cores and threads

Benchmarking LLVMpipe/swrast/SWR on any Raspberry Pi is the silliest thing I've heard all week. You can barely run any OpenGL games/apps with LLVMpipe on an x86 CPU as is.

[fuzz]

Yet again Intel duplicating work... do they not have the capability of improving llvmpipe? NIH syndrome?

[fuzz]

And do they even test their stuff on non-Intel processors? lol

[Tomin]

Yet again Intel duplicating work... do they not have the capability of improving llvmpipe? NIH syndrome?

OpenSWR is not a general purpose rasterizer and it has different goals than the previous ones.
See: https://lists.freedesktop.org/archiv...er/097816.html

Good question, given there are already three (swrast, softpipe, llvmpipe) in the Mesa3D tree. Two important reasons for this:

• Architecture - given our focus on scientific visualization, our workloads are much different than the typical game; we have heavy vertex load and relatively simple shaders. In addition, the core counts of machines we run on are much higher. These parameters led to design decisions much different than llvmpipe.
• Historical - Intel had developed a high performance software graphics stack for internal purposes. Later we adapted this graphics stack for use in visualization and decided to move forward with Mesa3D to provide a high quality API layer while at the same time benefiting from the excellent performance the software rasterizerizer gives us.

[fuzz]

OpenSWR is not a general purpose rasterizer and it has different goals than the previous ones.
See: https://lists.freedesktop.org/archiv...er/097816.html

Ahh, thank you. Makes a lot of sense.

So in a way it's not even worth comparing to llvmpipe, for example? I can see the team doesn't really have a reason to care about generic game-oriented performance.