1. Computers
  2. Display Drivers
  3. Graphics Cards
  4. Memory
  5. Motherboards
  6. Processors
  7. Software
  8. Storage
  9. Operating Systems


Facebook RSS Twitter Twitter Google Plus


Phoronix Test Suite

OpenBenchmarking.org

Gallium3D LLVMpipe Isn't Yet Fit For ARM

Mesa

Published on 05 December 2012 07:15 AM EST
Written by Michael Larabel in Mesa
9 Comments

While OpenGL is becoming a requirement for more of the Linux desktops out there, and ARM open-source graphics drivers aren't yet commonplace, using the Gallium3D LLVMpipe software rasterizer on ARM isn't yet a really viable solution.

LLVMpipe, which allows for running OpenGL on the CPU without the support of GPU and attempts to leverage LLVM for optimizations and taking advantage of multiple processing cores, simply isn't well-optimized yet. With the ARM Cortex-A15 being quite a nice upgrade over the Cortex-A9 ARM SoCs, I decided to build Mesa 9.1-devel Git with LLVM 3.1 on the Samsung Chromebook with its Exynos 5 Dual from Ubuntu 12.10.

While Gallium3D's LLVMpipe driver will run on ARM just as it has in the past, it's not too performant and optimized for this architecture. On x86, LLVMpipe really needs 64-bit support and multiple modern CPU cores (such as those boasting SSE4 and AVX) in order to deliver fairly low performance. On ARM, it just doesn't cut it yet without any ARM-specific optimizations. A modern ARM SoC is fast enough to get a compositing window manager running in software, but not really anything else that's useful.

Gallium3D LLVMpipe Isn't Yet Fit For ARM Gallium3D LLVMpipe Isn't Yet Fit For ARM

There's also other use-cases where LLVMpipe just doesn't cut it, as covered in Not All Linux Users Want To Toke On LLVMpipe.

About The Author
Michael Larabel is the principal author of Phoronix.com and founded the web-site in 2004 with a focus on enriching the Linux hardware experience and being the largest web-site devoted to Linux hardware reviews, particularly for products relevant to Linux gamers and enthusiasts but also commonly reviewing servers/workstations and embedded Linux devices. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics hardware drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated testing software. He can be followed via and or contacted via .
Latest Linux Hardware Reviews
  1. MSI X99S SLI PLUS On Linux
  2. NVIDIA GeForce GTX 970 Offers Great Linux Performance
  3. CompuLab Intense-PC2: An Excellent, Fanless, Mini PC Powered By Intel's i7 Haswell
  4. From The Atom 330 To Haswell ULT: Intel Linux Performance Benchmarks
Latest Linux Articles
  1. RunAbove: A POWER8 Compute Cloud With Offerings Up To 176 Threads
  2. 6-Way Ubuntu 14.10 Linux Desktop Benchmarks
  3. Ubuntu 14.10 XMir System Compositor Benchmarks
  4. Btrfs RAID HDD Testing On Ubuntu Linux 14.10
Latest Linux News
  1. openSUSE Factory & Tumbleweed Are Merging
  2. More Fedora Delays: Fedora 21 Beta Slips
  3. Mono Brings C# To The Unreal Engine 4
  4. Coreboot Now Has Support For Intel Broadwell Hardware
  5. Enlightenment's EFL 1.12 Alpha Has Evas GL-DRM Engine, OpenGL ES 1.1 Support
  6. GTK+ Lands Experimental Backend For Mir Display Server
  7. Ubuntu 14.10 Officially Released
  8. Mesa 10.4 Might Re-Enable HyperZ For R600g/RadeonSI
  9. Intel GVT-g GPU Virtualization Moves Closer
  10. GTK+ 3.16 To Bring Several New Features
Latest Forum Discussions
  1. Ubuntu 16.04 Might Be The Distribution's Last 32-Bit Release
  2. Updated and Optimized Ubuntu Free Graphics Drivers
  3. Linux hacker compares Solaris kernel code:
  4. HOPE: The Ease Of Python With The Speed Of C++
  5. Advertisements On Phoronix
  6. Users/Developers Threatening Fork Of Debian GNU/Linux
  7. AMD Releases UVD Video Decode Support For R600 GPUs
  8. Proof that strlcpy is un-needed