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

Reclocking Hits For Open-Source NVIDIA Driver

Nouveau

Published on 28 January 2012 11:05 AM EST
Written by Michael Larabel in Nouveau
5 Comments

Committed to the kernel repository for the open-source Nouveau driver for providing reverse-engineered NVIDIA hardware is now the initial GPU core/memory re-clocking support.

A few days back I reported on re-clocking support coming to Nouveau for the newer NVIDIA hardware. Hitting nouveau/linux-2.6 yesterday were a slew of patches that work on the re-clocking code along with support for adjusting the graphics memory timings, among other support work.

In total the Nouveau DRM patches committed yesterday impact around 1,000 lines of code in the kernel driver. This work is mostly for the NV50-class hardware, which is the GeForce 8, 9, 100, 200, and 300 series. Still under development is the GeForce 400/500 "Fermi" hardware support. The NV50 video RAM re-clocking right now is for graphics cards with DDR2/DDR3/GDDR3 memory.

This newly-committed code also allows selecting several power/performance profiles for AC and battery power consumption. A current limitation though of this code is that if multiple displays are connected or a display has a resolution above 1920 x 1200, the highest performance state is always being used now and for the time being it will not re-clock to a lower power state. This is being done to ensure there is sufficient video memory bandwidth for scanning out to the display(s), similar to the Radeon driver's power management / re-clocking limitation in these scenarios.

I'm still going through the patches but will be running new Nouveau tests this weekend and hopefully having some new Nouveau benchmarks out next week of this latest experimental Nouveau DRM paired with Mesa 8.0. My latest results for now were just published earlier this week in Nouveau For A $10 NVIDIA Graphics Card.

Another unrelated change that was also pushed into the Nouveau kernel repository is exposing the color vibrance control for NV50.

This work isn't for the upcoming Linux 3.3 kernel but will be part of the merge for the Linux 3.4 kernel, hopefully with some other changes and ideally some Nouveau improvements for the GeForce 400/500-Fermi graphics processors.

This latest Nouveau work was done by Ben Skeggs and Martin Peres. Martin will also be talking next week about the state of Nouveau and the future of this open-source community driver at FOSDEM 2012.

Latest Linux Hardware Reviews
  1. ASUS AM1I-A: A Mini-ITX Board For Socketed Kabini APUs
  2. Mini-Box M350: A Simple, Affordable Mini-ITX Case
  3. Overclocking The AMD AM1 Athlon & Sempron APUs
  4. AMD Athlon 5350 / 5150 & Sempron 3850 / 2650
Latest Linux Articles
  1. Ubuntu 12.04.4 vs. 13.10 vs. 14.04 LTS Desktop Benchmarks
  2. AMD OpenCL Performance With AM1 Kabini APUs
  3. A Quick Look At GCC 4.9 vs. LLVM Clang 3.5
  4. Are AMD Athlon/Sempron APUs Fast Enough For Steam On Linux?
Latest Linux News
  1. FreeBSD Advances For ARM, Bhyve, Clang
  2. Ubuntu 14.04 LTS "Trusty Tahr" Officially Released
  3. Ubuntu 12.04 LTS vs. 14.04 LTS Server Benchmarks
  4. QEMU 2.0 Released With ARM, x86 Enhancements
  5. Running The Unity 8 Preview Session On Ubuntu 14.04 LTS
  6. R600 Gallium3D Disables LLVM Back-End By Default
  7. Fedora 21 Gets GNOME 3.12, PHP 5.6, Mono 3.4
  8. Fedora Workstation Is Making Me Quite Excited
  9. Maynard: A Lightweight Wayland Desktop
  10. Chromium Browser Going Through Growing Pains In Ubuntu 14.04
  11. KDE 4.13 Is Being Released Today With New Features
  12. Trying Out Radeon R9 290 Graphics On Open-Source
Latest Forum Discussions
  1. The GNOME Foundation Is Running Short On Money
  2. Updated and Optimized Ubuntu Free Graphics Drivers
  3. Radeon 8000M problematic on Linux?
  4. After Jack Keane, RuseSoft will briing Ankh 3 to Linux through Desura
  5. Suspected PHP Proxy Issue
  6. Linux Kernel Developers Fed Up With Ridiculous Bugs In Systemd
  7. Change installation destination from home directory
  8. Bye bye BSD, Hello Linux: A Sys Admin's Story