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

Nouveau Page-Flipping For NV50/Fermi Is Flipped On

Nouveau

Published on 11 February 2011 10:32 AM EST
Written by Michael Larabel in Nouveau
7 Comments

While we are only half-way into the Linux 2.6.38 kernel development cycle with there still being a number of weeks before its formal release, there is already a reason to look forward to the Linux 2.6.39 kernel if you use -- or plan to utilize -- the open-source Nouveau graphics driver for NVIDIA graphics cards. What's there to be excited over is page-flipping being enabled by defaultfor the NVIDIA GeForce 400/500 "Fermi" and GeForce 8/9/100/200/300 "NV50" graphics cards.

Hitting the Git repository this week where the Nouveau DRM (Direct Rendering Manager) code for the Linux kernel is developed are two prominent commits alongside several other NV50 and NVC0 "Fermi" commits. This commit enables Nouveau KMS page-flipping for the NV50 class, which covers lots of hardware currently in use out there. This commit that came in shortly thereafter enables page-flipping for the NVC0/Fermi graphics cards.

There's been kernel mode-setting support for the GeForce 400 "Fermi" graphics cards for a couple of kernel releases now, but it's not until the Linux 2.6.38 kernel that there's actually the necessary support in the DRM driver for supporting 3D acceleration (and also needing the latest Mesa code on the user-space side). For now, this support also requires using external, out-of-tree firmware/microcode for the NVC0/Fermi acceleration. With the Linux 2.6.39 kernel, there's now page-flipping. It wasn't until recently that the open-source ATI driver even had KMS page-flipping in its mainline code-base.

Page flipping, of course, dramatically improves performance. Not only does it improve the performance by just changing the pointer between the front and back buffers rather than copying the entire contents back and forth, but this is also designed to lead to tear-free screen updating.

Ideally, by the time the Linux 2.6.39 kernel merge window opens there will be more advancements for the Nouveau project and the other open-source graphics drivers on Linux.

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. AMD Catalyst 14.6 Does Slightly Better With APITest OpenGL Tests
  2. Updated Source Engine Benchmarks On The Latest AMD/NVIDIA Linux Drivers
  3. Nouveau vs. Radeon vs. Intel Tests On Linux 3.16, Mesa 10.3-devel
  4. KVM Benchmarks On Ubuntu 14.10
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. Debian + radeonsi
  3. Open-source drivers on ATI R7 260X
  4. AMD Athlon 5350 APU On Linux
  5. Linus Torvalds On GCC 4.9: Pure & Utter Crap
  6. Updated and Optimized Ubuntu Free Graphics Drivers
  7. List of Linux friendly Kickstarter projects
  8. Porting Mesa to the Playstation 2