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. Btrfs On 4 x Intel SSDs In RAID 0/1/5/6/10
  2. AMD Radeon R9 290 On Ubuntu 14.10: RadeonSI Gallium3D vs. Catalyst
  3. MSI X99S SLI PLUS On Linux
  4. NVIDIA GeForce GTX 970 Offers Great Linux Performance
Latest Linux Articles
  1. NVIDIA's Linux Driver Can Deliver Better OpenGL Performance Than Windows 8.1
  2. Windows 8.1 vs. Ubuntu 14.10 With Intel HD Graphics
  3. 6-Way Ubuntu 14.10 Radeon Gallium3D vs. Catalyst Driver Comparison
  4. NVIDIA vs. Nouveau Drivers On Ubuntu 14.10
Latest Linux News
  1. AMD On Linux & Systemd Were Very Popular This Month
  2. Wine 1.7.30 Continues Work On DirectWrite & Offers Regedit Fixes
  3. Has The Sky Fallen? Qualcomm Contributes To Freedreno's DRM/KMS Driver
  4. Manjaro Works To Make Calamares A Distribution-Independent Installer
  5. DisplayLink USB 3.0 Support Sounds Like A Mess
  6. PulseAudio Gains A Native Bluetooth Headset Backend
  7. X.Org Foundation Decides On Its Women Outreach Project
  8. GTK+ 3.16's New GtkGLArea Widget Gets Improved
  9. X.Org Server 1.17 ABI Bumped
  10. Fedora 21 Beta To Be Released Next Week
Latest Forum Discussions
  1. Civilization: Beyond Earth Overcoming Linux GPU Driver Problems
  2. How to get rid of Linux
  3. Step by Step install of Latest Nvidia Driver Article Request
  4. Closed source to opensource
  5. What Would You Like To See Next?
  6. Is foolish currently develop in machine code, hexadecimal and assembly?
  7. Reducing The CPU Usage In Mesa To Improve Performance
  8. Help diagnosing problems with a Readon HD 4670 on Mesa 10.3.2-1