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

Intel Mesa Driver Gets KDE KWin Optimizations

KDE

Published on 01 April 2013 08:55 PM EDT
Written by Michael Larabel in KDE
Comment On This Article

A number of commits to the i965 driver in Mesa today benefit the performance of KDE's KWin window manager for those using Intel Ivy Bridge graphics hardware.

There were a number of commits pertaining to the i965 driver's fragment shared pushed this afternoon (i965/fs). Most notably, this should help Ivy Bridge with KWin when using the scaling-related effects using the OpenGL 2.x renderer.

The bug report relevant to this Intel IVB OpenGL performance regression is covered at FreeDesktop.org. There's several commits relevant to this optimization work. One of the commits by Eric Anholt also mentions a significant performance improvement with one of his GL Shading Language demos.
Like we have done for the VS and for constant-index uniform loads, we use the sampler engine to get caching in front of the L3 to avoid tickling the IVB L3 bug. This is also a bit of a functional change, as we're now loading a vec4 instead of a single dword, though we're not taking advantage of the other 3 components of the vec4 (yet).

With the driver hacked to always take the varying-index path for all uniforms, improves performance of my old GLSL demo by 315% +/- 2% (n=4). This a major fix for some blur shaders in compositors from the varying-index uniforms support I introduced in 9.1.
It also looks like the newly-merged patch series takes care of some Sandy Bridge performance issues too.

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. Scythe Mugen MAX
  2. Intel Core i7 5960X Haswell-E On Linux
  3. Intel 80GB 530 Series M.2 SSD On Linux
  4. With A New Motherboard, The Core i7 5960X Haswell-E Lights Up
Latest Linux Articles
  1. Running Fedora 20 On Intel's Core i7 Haswell-E Platform
  2. A Tour Of The New Phoronix Office
  3. 7-Way Linux Desktop Gaming Comparison On Ubuntu 14.10
  4. Intel P-State vs. CPUFreq Benchmarks On The i7-5960X
Latest Linux News
  1. Counter-Strike: Global Offensive Starts Rolling Out To Linux Users
  2. Trying Out The OpenSUSE 13.2 Beta: The Installer Is Still Lacking
  3. The Gestures Support Of GNOME 3.14
  4. Linux 3.17 Has Basic Support For The Xbox One Controller
  5. openSUSE 13.2 Beta Still Using Btrfs By Default, & KDE Plasma 5 For Testing
  6. GTK+ 3.14 Brings Much Better Wayland Support, Multi-Touch, New Theme
  7. DisplayPort Comes To USB's Type-C Connector
  8. NSS Updated On Ubuntu 12.04/14.04 To Allow Netflix Support
  9. Linux 3.17-rc6 Released; Linux 3.17 Final Might Come In One Week
  10. X.Org Server 1.16.1 Released
Latest Forum Discussions
  1. X.Org Women Outreach Program Only Turns Up Two Applicants So Far
  2. Uselessd: A Stripped Down Version Of Systemd
  3. Updated and Optimized Ubuntu Free Graphics Drivers
  4. State of Nouveau now and in the near future?
  5. Wasteland 2 Officially Launched Today, Including For Linux Gamers
  6. NVIDIA GTX 770/780 -works ?
  7. New stress testing utility for GPU's
  8. How to get Catalyst 14.4 working on Ubuntu 14.04