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

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 Hardware Reviews
  1. NVIDIA GeForce GTX 970 Offers Great Linux Performance
  2. CompuLab Intense-PC2: An Excellent, Fanless, Mini PC Powered By Intel's i7 Haswell
  3. From The Atom 330 To Haswell ULT: Intel Linux Performance Benchmarks
  4. AMD Radeon R9 285 Tonga Performance On Linux
Latest Linux Articles
  1. AMD Moves Forward With Unified Linux Driver Strategy, New Kernel Driver
  2. MSI: Update Your BIOS From The Linux Desktop
  3. NVIDIA vs. AMD 2D Linux Drivers: Catalyst Is Getting Quite Good At 2D
  4. 15-Way GPU Comparison With Mesa 10.3 + Linux 3.17
Latest Linux News
  1. Debian Now Defaults To Xfce On Non-x86 Desktops
  2. Phoenix Is Trying To Be An Open Version Of Apple's Swift
  3. Linux 3.19 To Have Skylake Graphics, PPGTT Enablement
  4. Ubuntu 16.04 Might Be The Distribution's Last 32-Bit Release
  5. Imagination Releases Full ISA Documentation For PowerVR Rogue GPUs
  6. Features GNOME Developers Want In The Linux Kernel
  7. GTK+ Gains Experimental Overlay Scrollbars
  8. Phoronix Test Suite 5.4 M3 Is Another Hearty Update
  9. GParted 0.20 Improves Btrfs Support
  10. EXT4 In Linux 3.18 Has Clean-ups, Bug Fixes
Latest Forum Discussions
  1. Users/Developers Threatening Fork Of Debian GNU/Linux
  2. Proof that strlcpy is un-needed
  3. xbox one tv tuner
  4. HOPE: The Ease Of Python With The Speed Of C++
  5. Bye bye BSD, Hello Linux: A Sys Admin's Story
  6. Updated and Optimized Ubuntu Free Graphics Drivers
  7. NVIDIA Presents Its Driver Plans To Support Mir/Wayland & KMS On Linux
  8. AMD Is Restructuring Again, Losing 7% Of Employees