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

Testing Out The Major Nouveau libdrm Rewrite

Michael Larabel

Published on 21 April 2012
Written by Michael Larabel
Page 1 of 6 - 7 Comments

Committed to the Mesa and libdrm Git repositories last week for Nouveau, the open-source NVIDIA Linux driver, was the "major libdrm rewrite" designed to step-up this reverse-engineered driver. What impact did these invasive changes have on the Nouveau driver's performance? Here are benchmarks comparing before-and-after as well as how the Nouveau driver compares to the proprietary NVIDIA Linux graphics driver.

For information on the important Nouveau libdrm milestone, read the A Massive Nouveau Code Push Happened Today article from last week. The improvements made to the Nouveau driver facing the DRM library were important as for some tests it's been reported to boost the performance (namely with Nexuiz) and for other workloads can lower the CPU usage. The Nouveau libdrm changes affect how buffer objects are handled with modern GeForce generations under Nouveau. Following this libdrm rewrite is also when the Nouveau Kepler Gallium3D code landed.

With the libdrm rewrite, the Nouveau support is also enabled by default on new libdrm builds compared to having to pass a Nouveau "experimental" build switch for libdrm to provide the Nouveau driver support. This comes at a time when the Nouveau DRM driver has finally left the Linux kernel staging area and the open-source NVIDIA driver is approaching a stable state.

Some quick benchmarks from a Lenovo ThinkPad notebook with an Intel Core i7 720QM processor and NVIDIA Quadro FX880M graphics was used to look at the impact of the Nouveau libdrm changes. From Ubuntu 12.04 LTS x86_64, the NVIDIA graphics performance was compared using the binary driver (NVIDIA 295.40), using the stock Nouveau driver stack in Ubuntu 12.04, using the Git Nouveau driver stack (Linux kernel, xf86-video-nouveau, libdrm, and Mesa) just prior to merging the libdrm changes last week, and then the revised Git stack after the changes hit libdrm, xf86-video-nouveau, and Mesa.

<< Previous Page
1
Latest Linux Hardware Reviews
  1. NVIDIA GeForce GTX 970 Offers Great Linux Performance
  2. CompuLab Intense-PC2: An Excellent, Fanless, Mini PC Powered By Intel's i7 Haswell
  3. From The Atom 330 To Haswell ULT: Intel Linux Performance Benchmarks
  4. AMD Radeon R9 285 Tonga Performance On Linux
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. Ubuntu 16.04 Might Be The Distribution's Last 32-Bit Release
  2. Imagination Releases Full ISA Documentation For PowerVR Rogue GPUs
  3. Features GNOME Developers Want In The Linux Kernel
  4. GTK+ Gains Experimental Overlay Scrollbars
  5. Phoronix Test Suite 5.4 M3 Is Another Hearty Update
  6. GParted 0.20 Improves Btrfs Support
  7. EXT4 In Linux 3.18 Has Clean-ups, Bug Fixes
  8. Emacs 24.4 Has Built-In Web Browser, Improved Multi-Monitor Support
  9. NVIDIA's NVPTX Support For GCC Is Close To Being Merged
  10. KDE's KWin On Wayland Begins Using Libinput
Latest Forum Discussions
  1. Users/Developers Threatening Fork Of Debian GNU/Linux
  2. HOPE: The Ease Of Python With The Speed Of C++
  3. Proof that strlcpy is un-needed
  4. Bye bye BSD, Hello Linux: A Sys Admin's Story
  5. Updated and Optimized Ubuntu Free Graphics Drivers
  6. NVIDIA Presents Its Driver Plans To Support Mir/Wayland & KMS On Linux
  7. AMD Is Restructuring Again, Losing 7% Of Employees
  8. Open-Source AMD Fusion E-350 Support Takes A Dive