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

R600g Driver Patch That Can 4x The Frame-Rate

Mesa

Published on 31 October 2012 09:32 PM EDT
Written by Michael Larabel in Mesa
40 Comments

Following yesterday's article comparing the AMD Radeon Linux drivers on Ubuntu 12.10, Marek Olšák looked into some of the cases where the open-source Radeon Gallium3D driver was much slower than the proprietary Catalyst driver. Already with one patch that touches only two dozen lines of code, Marek was able to quadruple the open-source driver frame-rate for at least one game.

By forcing some buffers to use the video RAM rather than the GART/GTT system memory, Marek managed the 4x OpenGL performance increase on the R600g driver for the Reaction Quake 3 game.

The patch surfaced today on the Mesa mailing list. "The problem was we set VRAM|GTT for relocations of STATIC resources. Setting just VRAM increases the framerate 4 times on my machine."

For those wondering about other possible performance optimizations for the open-source Mesa/Gallium3D drivers, Alex Deucher of AMD wrote in the forums that better heuristics for better buffer placement and buffer upload/caching can be a win as well as shader compiler improvements, cached and uncached GART memory usage, and better 1D/2D/linear tiling selection heuristics.

Among the missing OpenGL features for Radeon HD 2000 through HD 4000 graphics cards at the moment include geometry shaders, multi-sample textures, uniform buffer objects, and texture buffer objects, wrote Marek in another post.

Latest Linux Hardware Reviews
  1. 13-Way Low-End GPU Comparison With AMD's AM1 Athlon
  2. ASUS AM1I-A: A Mini-ITX Board For Socketed Kabini APUs
  3. Mini-Box M350: A Simple, Affordable Mini-ITX Case
  4. Overclocking The AMD AM1 Athlon & Sempron APUs
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. Wine 1.7.17 Works On Its Task Scheduler, C Run-Time
  2. The Improv ARM Board Still Isn't Shipping; Riding A Dead Horse?
  3. Debian To Maintain 6.0 Squeeze As An LTS Release
  4. Wasteland 2 Is Finally Released For Linux Gamers
  5. FreeBSD Advances For ARM, Bhyve, Clang
  6. Ubuntu 14.04 LTS "Trusty Tahr" Officially Released
  7. Ubuntu 12.04 LTS vs. 14.04 LTS Server Benchmarks
  8. QEMU 2.0 Released With ARM, x86 Enhancements
  9. Running The Unity 8 Preview Session On Ubuntu 14.04 LTS
  10. R600 Gallium3D Disables LLVM Back-End By Default
  11. Fedora 21 Gets GNOME 3.12, PHP 5.6, Mono 3.4
  12. Fedora Workstation Is Making Me Quite Excited
Latest Forum Discussions
  1. Suggestions about how to make a Radeon HD 7790 work decently?
  2. The GNOME Foundation Is Running Short On Money
  3. Updated and Optimized Ubuntu Free Graphics Drivers
  4. Radeon 8000M problematic on Linux?
  5. Linux Kernel Developers Fed Up With Ridiculous Bugs In Systemd
  6. After Jack Keane, RuseSoft will briing Ankh 3 to Linux through Desura
  7. Suspected PHP Proxy Issue
  8. Change installation destination from home directory