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

Intel Driver Is Now Doing Triple-Bufferred Page-Flips

Intel

Published on 12 July 2011 07:48 AM EDT
Written by Michael Larabel in Intel
4 Comments

The Intel Linux X.Org driver is now doing triple-buffered page-flips in the latest attempt to battle imperfect frames with tears or jitters. This is now the default behavior with the next xf86-video-intel release.

Rather than simply page-flipping just between a front and back-buffer, the Intel DDX now has a third buffer. This third buffer, the draw buffer, is supplied immediately upon the front-buffer being flipped so that the application rendering isn't blocked temporarily while waiting for the current front-buffer to be swapped away from the scan-out. This should basically work around jitters by always having a frame ready rather than hitting cases where rendering a new frame may take longer than the frame interval length. Or in other words, the frame-rate being stuck at 30 and/or 60 FPS. The downside is that you just have an extra frame of latency. This triple-buffering on applies to Intel KMS page-flipping.

This triple-bufferred page-flipping was introduced via this commit by Chris Wilson. For anyone wishing to revert to the old behavior, there's now a TripleBuffer xorg.conf option to disable the said functionality.

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. CompuLab Intense-PC2: An Excellent, Fanless, Mini PC Powered By Intel's i7 Haswell
  2. From The Atom 330 To Haswell ULT: Intel Linux Performance Benchmarks
  3. AMD Radeon R9 285 Tonga Performance On Linux
  4. Apotop Wi-Copy
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. Following GCC, Clang Looks To Default To C11
  2. Users/Developers Threatening Fork Of Debian GNU/Linux
  3. Linux 3.18-rc1 Released One Week Early With Many Changes
  4. The VC4 Gallium3D Driver Is Still Moving Along For The Raspberry Pi
  5. Direct3D 9 Support Might Land Within Mainline Mesa 3D Drivers
  6. OpenGL Preview Benchmarks For NVIDIA's GeForce GTX 970
  7. HOPE: The Ease Of Python With The Speed Of C++
  8. Vitesse: Using LLVM To Speed Up Databases
  9. AMD Is Restructuring Again, Losing 7% Of Employees
  10. Linux Testing Of The NVIDIA GeForce GTX 970
Latest Forum Discussions
  1. NVIDIA Presents Its Driver Plans To Support Mir/Wayland & KMS On Linux
  2. AMD Is Restructuring Again, Losing 7% Of Employees
  3. Bye bye BSD, Hello Linux: A Sys Admin's Story
  4. Open-Source AMD Fusion E-350 Support Takes A Dive
  5. Upgrade to Kaveri, very slow VDPAU performance
  6. ChromeOS Drops Support For EXT2/EXT3/EXT4 File-Systems
  7. Lennart Poettering On The Open-Source Community: A Sick Place To Be In
  8. The Slides Announcing The New "AMDGPU" Kernel Driver