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. AMD's New Athlon/Semprons Give Old Phenom CPUs A Big Run For The Money
  2. 13-Way Low-End GPU Comparison With AMD's AM1 Athlon
  3. ASUS AM1I-A: A Mini-ITX Board For Socketed Kabini APUs
  4. Mini-Box M350: A Simple, Affordable Mini-ITX Case
Latest Linux Articles
  1. How Much Video RAM Is Needed For Catalyst R3 Graphics?
  2. Ubuntu 12.04 LTS vs. 14.04 LTS Cloud Benchmarks
  3. Ubuntu 12.04.4 vs. 13.10 vs. 14.04 LTS Desktop Benchmarks
  4. AMD OpenCL Performance With AM1 Kabini APUs
Latest Linux News
  1. Oracle Linux 6.5 vs. Oracle Linux 7.0 Beta Benchmarks
  2. Easter Yields The Linux 3.15-rc2 Kernel Release
  3. The Most Amazing OpenGL Tech Demo In 64kb
  4. Packard Bell LM85 Now Supported By Coreboot
  5. AmazonBasics External USB 2.0 DVD Writer For Linux
  6. TP-LINK TG-3468: A $12 Linux PCI-E Gigabit Network Adapter
  7. Linux 3.15 Lands Some DRM Graphics Driver Fixes
  8. AMD Is Disabling DPM Support For RV770 GPUs
  9. ReactOS Working On A Community Windows OS
  10. eRacks Keeps Pushing Linux, Open-Source Systems After 15 Years
  11. Borderlands Is Being Considered For Linux
  12. Mesa 10.0 & 10.1 Stable Get Updated
Latest Forum Discussions
  1. The GNOME Foundation Is Running Short On Money
  2. Updated and Optimized Ubuntu Free Graphics Drivers
  3. Catalyst 14.3 Beta
  4. Suggestions about how to make a Radeon HD 7790 work decently?
  5. Radeon 8000M problematic on Linux?
  6. Linux Kernel Developers Fed Up With Ridiculous Bugs In Systemd
  7. After Jack Keane, RuseSoft will briing Ankh 3 to Linux through Desura
  8. Suspected PHP Proxy Issue