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 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. AMD Will Release Mantle Programming Guide, API Reference This Month
  2. Unreal Engine Made Free By Epic Games
  3. Qt 5.5 Alpha Is Getting Close, But Still Behind Schedule
  4. OpenBSD Sponsors Work For Better Browser Security
  5. Improved ODF Reading Support Comes To KDE's Calligra
  6. Another Step Closer On The New Linux Benchmarking Test Farm
  7. Confirmed: Vulkan Is The Next-Gen Graphics API
  8. Kdenlive Ported To Qt5/KF5, Coming To KDE Applications 15.04
  9. HTC & Valve Partnered Up For The Steam VR Headset
  10. 8cc: A Small C11 Compiler
Most Viewed News This Week
  1. Screenshots Of The GNOME 3.16 Changes
  2. More Proof That Allwinner Is Violating The GPL
  3. The Tremendous Features Of Fedora 22
  4. Krita 2.9 Released, Their Biggest Release Ever
  5. A Single UEFI Executable With The Linux Kernel, Initrd & Command Line
  6. Linux 4.0 Doesn't Have The Weirdest Codename
  7. Canonical Comes Up With Its Own FUSE Filesystem For Linux Containers
  8. Firefox 36 Brings Full HTTP/2 Support
%%CLICK_URL_UNESC%%