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 Benchmarking Platform
Phoromatic Test Orchestration

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.

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. Ubuntu 15.04 Offers Faster OpenGL For AMD Radeon GPUs On Open-Source
  2. Ubuntu 15.04 Brings Some Graphics Performance Improvements For Intel Haswell
  3. Sub-$20 802.11n USB WiFi Adapter That's Linux Friendly
  4. The Lenovo T450s Is Working Beautifully With Linux
  5. Linux 4.0 SSD EXT4 / Btrfs / XFS / F2FS Benchmarks
  6. Linux 4.0 Hard Drive Comparison With Six File-Systems
Latest Linux News
  1. Vivaldi TP3 Browser Adds Native Window Support On Linux
  2. A Brief Update On Fwupd For Linux Firmware Updating Of Devices
  3. Upgrading To KDE Plasma 5.3 On Kubuntu 15.04
  4. Ubuntu 15.10 Plans Being Discussed Next Week
  5. KDE Plasma 5.3 Released: Expands On Widgets, Bluetooth, PM
  6. Making It Easier To Deploy CUDA On Fedora
  7. GCC 4.9.2 vs. GCC 5 Benchmarks On An Intel Xeon Haswell
  8. Intel Haswell/Broadwell Power Use On Linux Still Moving Lower
  9. QEMU 2.3 Officially Released
  10. It's Been Three Years Since The Big Steam Linux Reveal
Most Viewed News This Week
  1. Ubuntu's Desktop-Next Switching From .DEBs To Snappy
  2. Systemd Kills Off Shutdownd
  3. KDBUS Still Hasn't Been Pulled, Might Not Land For Linux 4.1
  4. My Favorite Computer Desk Of The Past Decade For Less Than $100
  5. AMD Open-Sources "Addrlib" From Catalyst
  6. Qt Creator 3.4 Brings C++ Programming Improvements & More
  7. Debian 8.0 Jessie Is Ready For Release This Weekend
  8. GIMP's Porting To GTK3 Continues