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

DRI2 Sync & Swap For ATI Finally Comes About

AMD

Published on 07 May 2010 12:06 PM EDT
Written by Michael Larabel in AMD
38 Comments

Last year a new set of DRI2 extensions came about for sync and swap support of display buffers to better reduce potential "tearing" that may appear on displays in some composited environments. This work that's exposed to the client through OpenGL/GLX extensions also can lead to improved performance, video memory savings, and other benefits as talked about extensively on the Composite Swap Wiki page. A new GLX swap event extension also came about out of expressed needs by the Clutter/Mutter developers.

Benefiting from this new code requires recent graphics packages, like X.Org Server 1.8, newer dri2proto / glproto / libdrm, and Mesa 7.8. The hardware drivers have also needed to be updated to implement these capabilities. Up to this point only the Intel Linux driver has provided this sync and swap support, since from the onset this code was developed by the Intel OSTC developers and as such their driver was the one targeted for the reference implementation. Fortunately, the ATI driver is now picking up the support.

Red Hat's Jerome Glisse has been porting the sync and swap extension support to the ATI kernel mode-setting driver. This morning Jerome put out a single, 500-line patch that implements this useful functionality. This patch goes against the latest xf86-video-ati DDX driver Git code-base and it also requires a change (for querying the hardware CRTC ID) to the Radeon DRM code found within the Linux kernel, which can be found in a separate patch that was recently published by Jerome.

Jerome reports that so far his testing has been favorable and now he's looking for the community to engage in testing out this sync and swap support for ATI hardware on the open-source stack. It will require very up-to-date components of the Linux graphics stack, as mentioned above, and hopefully the needed DRM change(s) will make it into the Linux 2.6.35 kernel and the DDX alterations will make it into the next xf86-video-ati release.

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. Even With Re-Clocking, Nouveau Remains Behind NVIDIA's Proprietary Linux Driver
  2. The Power Consumption & Efficiency Of Open-Source GPU Drivers
  3. AMD R600g/RadeonSI Performance On Linux 3.16 With Mesa 10.3-devel
  4. Intel Pentium G3258 On Linux
Latest Linux Articles
  1. Updated Source Engine Benchmarks On The Latest AMD/NVIDIA Linux Drivers
  2. Nouveau vs. Radeon vs. Intel Tests On Linux 3.16, Mesa 10.3-devel
  3. KVM Benchmarks On Ubuntu 14.10
  4. X.Org Server 1.16 Officially Released With Terrific Features
Latest Linux News
  1. Builder: A New Development IDE Being Built For GNOME
  2. GDB 7.8 Betters Python Scripting, Adds Guile Support
  3. GNOME's GTK+ Is Still Striving For A Scene Graph, Canvas API
  4. Unreal Tournament Looks Great For Team Deathmatch
  5. LibreOffice 4.3 Released With Many Exciting Changes
  6. GNOME/GTK On Wayland Gains Focus At GUADEC
  7. GNOME Stakeholders Take Issue With Groupon Over their Gnome
  8. GStreamer VA-API Plug-In Update Adds New Features
  9. Qt 5.4 Going Into Feature Freeze Next Week With Exciting Changes
  10. OpenSUSE Factory Turns Into Rolling Release Distribution
Latest Forum Discussions
  1. Grand Theft Auto Running On Direct3D Natively On Linux Shows Gallium3D Potential
  2. Open-source drivers on ATI R7 260X
  3. AMD Athlon 5350 APU On Linux
  4. Linus Torvalds On GCC 4.9: Pure & Utter Crap
  5. Updated and Optimized Ubuntu Free Graphics Drivers
  6. Debian + radeonsi
  7. List of Linux friendly Kickstarter projects
  8. Porting Mesa to the Playstation 2