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 Articles & Reviews
  1. Samsung 850 EVO SSD Linux Benchmarks
  2. Kubuntu 15.04 Is Turning Out Quite Nice, Good Way To Try Out The Latest KDE
  3. 5-Way Linux Distribution Comparison On The Core i3 NUC
  4. OCZ ARC 100 Linux SSD Benchmarks
  5. Lenovo ThinkPad X1 Carbon Works Great As A Linux Ultrabook
  6. Transcend SSD370 256GB
Latest Linux News
  1. The Khronos Group Filed A Trademark On "Vulkan" API
  2. Mozilla Thunderbird Adoption Climbs, Thunderbird 38 In May
  3. The Most Popular Linux Benchmark Results On OpenBenchmarking.org
  4. Intel's Graphics Driver For Linux 4.1 Will Have More XenGT vGPU Support
  5. PlayOnLinux 4.2.6 Fixes A Number Of Issues
  6. Mesa 10.5-RC3 Now Available To Test Improved GPU Drivers
  7. New Specifications On The Alleged Ubuntu Tablet
  8. LLVM 3.6 Officially Released With Many Compiler Advantages
  9. VLC 2.2 "Weathermax" Brings Better VP9 & H.265 Support
  10. Open-Source .NET On Linux Continues Maturing
Most Viewed News This Week
  1. Linux 4.0-RC1 Tagged, Linux 4.0 Will Bring Many Notable Improvements
  2. Screenshots Of The GNOME 3.16 Changes
  3. More Proof That Allwinner Is Violating The GPL
  4. Linux 4.0 Doesn't Have The Weirdest Codename
  5. Mir Now Depends Upon C++14
  6. GNOME 3.16 Beta Brings Wayland-Based Log-in Screen
  7. Krita 2.9 Released, Their Biggest Release Ever
  8. LLVM Clang Compiling The Linux Kernel Is A Big Topic For 2015
%%CLICK_URL_UNESC%%