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. Intel Xeon E5-1680 v3 & E5-2687W v3 Compared To The Core i7 5960X On Linux
  2. Intel 120GB 530 Series SSD Linux Performance
  3. Btrfs/EXT4/XFS/F2FS RAID 0/1/5/6/10 Linux Benchmarks On Four SSDs
  4. AMD's Windows Catalyst Driver Remains Largely Faster Than Linux Drivers
Latest Linux Articles
  1. NVIDIA vs. Nouveau Drivers With Linux 3.18 + Mesa 10.4-devel
  2. Is The Open-Source NVIDIA Driver Fast Enough For Steam On Linux Gaming?
  3. Linux 3.18 File-System Performance Minimally Changed But Possible Regressions
  4. AMD Radeon Gallium3D Is Catching Up & Sometimes Beating Catalyst On Linux
Latest Linux News
  1. Linux 3.18 Kernel: Not Much Change With Intel Haswell Performance
  2. More File-System Tests Of The Linux 3.18 Kernel
  3. Using NVIDIA's NVENC On Linux With FFmpeg
  4. There's Talk Again About An "Open To The Core" Ubuntu Laptop
  5. PowerVR SGX Driver Code Gets Leaked
  6. V2 Of KDBUS Published For Linux Kernel Review
  7. VirtualBox 4.3.20 Arrives, Still No Sign Of VirtualBox 4.4
  8. Scientific Linux 6.6 vs. Scientific Linux 7.0 Benchmarks
  9. Qualcomm Looks To Get Into The ARM Server Business
  10. HHVM 3.4 Adds New Features, Support
Latest Forum Discussions
  1. Roadmap to Catalyst 14.10 ?
  2. Updated and Optimized Ubuntu Free Graphics Drivers
  3. Cant get working Kaveri APU - A10-7850k
  4. Debian Developer Resigns From The Systemd Maintainership Team
  5. Script for Fan Speed Control
  6. Debian Init System Coupling Vote Results
  7. The Slides Announcing The New "AMDGPU" Kernel Driver
  8. Ubuntu Developers Still Thinking What To Do About Adobe Flash Support