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

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 Articles & Reviews
  1. Radeon Linux Benchmarks: Catalyst 15.3 Beta vs. Linux 4.0 + Mesa 10.6-devel
  2. Trying Out The Modern Linux Desktops With 4 Monitors + AMD/NVIDIA Graphics
  3. Turning A Basement Into A Big Linux Server Room
  4. NVIDIA's $1000+ GeForce GTX TITAN X Delivers Maximum Linux Performance
  5. OS X 10.10 vs. Ubuntu 15.04 vs. Fedora 21 Tests: Linux Sweeps The Board
  6. The New Place Where Linux Code Is Constantly Being Benchmarked
Latest Linux News
  1. Debian 8.0 Jessie Gets A Release Date
  2. Firefox 37 Coming Today With Heartbeat, HTTPS Bing
  3. OpenIndiana 2015.03 Updates Its Solaris/Illumos Environment
  4. GNOME 3.16 SDK Runtime Now Available
  5. Initial Intel Braxton Support Might Come To Linux 4.1
  6. Why KDE's KWin Doesn't Integrate Weston/QtCompositor For Wayland Support
  7. Clang Now Supports Targeting The NaCl OS
  8. PC-BSD Updates Its Lumina Desktop (v0.8.3)
  9. Fedora 22 Alpha Now Available For AArch64 & PowerPC64
  10. Systemd Developers Did NOT Fork The Linux Kernel
Most Viewed News This Week
  1. Introducing The Library Operating System For Linux
  2. The Big Features Of The Linux 4.0 Kernel
  3. Improved OpenCL Support For Blender's Cycles Renderer
  4. Open-Source Driver Fans Will Love NVIDIA's New OpenGL Demo
  5. Allwinner Continues Jerking Around The Open-Source Community
  6. GNOME 3.16 Released: It's Their Best Release Yet
  7. Ubuntu 15.04 Final Beta Released
  8. Systemd Change Allows For Stateless Systems With Tmpfs