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 Benchmarking Platform
Phoromatic Test Orchestration

GLAMOR Radeon Shows 2D Acceleration Promise

AMD

Published on 12 July 2012 07:06 AM EDT
Written by Michael Larabel in AMD
48 Comments

It looks like, thanks in part to an existing shoddy EXA 2D acceleration implementation, that the GLAMOR-based Radeon acceleration support for xf86-video-ati may work out quite well.

Chris Wilson (of Intel) decided to check out the GLAMOR performance for the open-source Radeon driver under Cairo, his pet project. As shared a few days ago, AMD will be using GLAMOR as the means of 2D acceleration for the Radeon HD 7000 series. While HD 7000 series is the current target, this GLAMOR acceleration code should work on previous generations of Radeon hardware since GLAMOR is basically piping the 2D code over OpenGL.

Right now for the Radeon HD 7000 series, the default means of 2D acceleration is still using "ShadowFB" since the RadeonSI Gallium3D driver isn't even into shape yet for handling GLAMOR. ShadowFB is just using a shadow frame-buffer with the CPU.

Up to this point, GLAMOR was just being used with Intel's hardware/driver. On the Intel side, however, for Sandy Bridge and Ivy Bridge at least I've found the other experimental 2D acceleration option -- SNA -- to easily beat GLAMOR in terms of stability, reliability, and performance.

Anyhow, Chris Wilson's results for GLAMOR Radeon are quite interesting and can be found on his blog. Below is the main takeaway:
Perhaps the first thing that we notice is the raw power of the discrete graphics as exposed by using OpenGL directly from within cairo. Secondly, we notice the lack luster performance of the existing EXA driver for the Radeon chipset – remember everything below the lines implies that the GPU driver in Xorg is behaving worse than could be achieved just through client-side sowftware rendering, that using RENDER acceleration is nothing of the sort. And then our attention turns to the newcomer, glamor on radeon. It is still notably much slower than both the CPU and using OpenGL directly. However, it is of very similar performance to the existing EXA driver, sometimes slower, sometimes faster (if you look at the relative x11perf, then it reveals some areas where the EXA driver could do major improvements).
Phoronix tests of GLAMOR Radeon acceleration will be conducted once I'm back to America from Nicaragua.

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 News
  1. Linux Mint 17.2 Officially Released With Cinnamon/MATE Flavors
  2. Fedora For MIPS Is Now Out In Testing, Supports The Creator CI20
  3. KDE Plasma 5.3.2 Fixes Shutdown Scripts, Few Dozen Other Bugs
  4. KDE Marks Four Years In Its Process Of Porting To Wayland
  5. Btrfs In Linux 4.2 Brings Quota Updates, Many Fixes
  6. Latest Rumor Pegs Microsoft Wanting To Buy AMD
  7. The Next-Gen Phoronix Site Experience Is Almost Ready
  8. Exciting Features Merged So Far For The Linux 4.2 Kernel
  9. Mesa 10.6.1 Brings A Bug-Fix For Dota 2 Reborn
  10. DragonFlyBSD 4.2 Released: Brings Improved Graphics & New Compiler
Latest Articles & Reviews
  1. How KDE VDG Is Trying To Make Open-Source Software Beautiful
  2. Attempting To Try Out BCache On The Linux 4.1 Kernel
  3. CompuLab's Fitlet Is A Very Tiny, Fanless, Linux PC With AMD A10 Micro
  4. AMD A10-7870K Godavari: RadeonSI Gallium3D vs. Catalyst Linux Drivers
Most Viewed News This Week
  1. Kubuntu 15.10 Could Be The End Of The Road
  2. Linus Is Looking Forward To Merging KDBUS, But Not Convinced By Performance
  3. NVIDIA Starts Supplying Open-Source Hardware Reference Headers
  4. KDBUS Won't Be Pushed Until The Linux 4.3 Kernel
  5. Linux 4.2 Kernel Gets Port To New Processor Architecture
  6. The Staging Pull For Linux 4.2: "Big, Really Big"
  7. SteamOS "Brewmaster" Is Valve's New Debian 8.1 Based Version
  8. Jonathan Riddell Steps Down From The Kubuntu Council