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

More Performance Comes Out Of Intel Linux SNB

Intel

Published on 22 March 2011 11:04 AM EDT
Written by Michael Larabel in Intel
5 Comments

Near the beginning of this month I talked about an important Sandy Bridge performance fix landing in Mesa that with 13 lines of changed code resulted in a huge performance improvement for those using the new integrated graphics found on the Sandy Bridge CPUs. This performance boost was quite dramatic and made the open-source Intel Linux driver comparable to Intel's closed-source Windows driver, but the performance tuning is not done yet. There's DRM patches arriving this morning that squeeze more performance out of Intel Sandy Bridge graphics under Linux.

Chris Wilson has published a new patch series for using LLC cache on Sandy Bridge / "Gen 6" graphics. The LLC work was started by Eric Anholt, but Chris Wilson has continued on with various Intel SNB improvements.

As far as what the LLC caching on Sandy Bridge CPUs means for graphics performance, the Sandy Bridge graphics performance goes up by an additional 10% with the OpenArena game, for example.
This provided a 10.4% +/- 1.5% (n=3) performance improvement on openarena on my laptop. We have more room to improve with doing LLC caching for display using GFDT, and in doing LLC+MLC caching, but this was an easy performance win and incremental improvement toward those two.

The patch-set is currently sitting on the Intel-gfx mailing list. Though unless this is pushed into the DRM tree in the next few days, it's unlikely it will land prior to the Linux 2.6.40 kernel. The Linux 2.6.39 kernel is already looking to be quite interesting without this work, in particular due to major Nouveau performance wins, but this set of 15 patches to the Intel DRM driver will probably not land there. Hitting 2.6.39 wouldn't mean much for most Linux desktop users anyways since Ubuntu 11.04 and Fedora 15 are already set to ship with the Linux 2.6.38 kernel.

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. MSI X99S SLI PLUS On Linux
  2. NVIDIA GeForce GTX 970 Offers Great Linux Performance
  3. CompuLab Intense-PC2: An Excellent, Fanless, Mini PC Powered By Intel's i7 Haswell
  4. From The Atom 330 To Haswell ULT: Intel Linux Performance Benchmarks
Latest Linux Articles
  1. RunAbove: A POWER8 Compute Cloud With Offerings Up To 176 Threads
  2. 6-Way Ubuntu 14.10 Linux Desktop Benchmarks
  3. Ubuntu 14.10 XMir System Compositor Benchmarks
  4. Btrfs RAID HDD Testing On Ubuntu Linux 14.10
Latest Linux News
  1. openSUSE Factory & Tumbleweed Are Merging
  2. More Fedora Delays: Fedora 21 Beta Slips
  3. Mono Brings C# To The Unreal Engine 4
  4. Coreboot Now Has Support For Intel Broadwell Hardware
  5. Enlightenment's EFL 1.12 Alpha Has Evas GL-DRM Engine, OpenGL ES 1.1 Support
  6. GTK+ Lands Experimental Backend For Mir Display Server
  7. Ubuntu 14.10 Officially Released
  8. Mesa 10.4 Might Re-Enable HyperZ For R600g/RadeonSI
  9. Intel GVT-g GPU Virtualization Moves Closer
  10. GTK+ 3.16 To Bring Several New Features
Latest Forum Discussions
  1. Ubuntu 16.04 Might Be The Distribution's Last 32-Bit Release
  2. Updated and Optimized Ubuntu Free Graphics Drivers
  3. Linux hacker compares Solaris kernel code:
  4. HOPE: The Ease Of Python With The Speed Of C++
  5. Advertisements On Phoronix
  6. Users/Developers Threatening Fork Of Debian GNU/Linux
  7. AMD Releases UVD Video Decode Support For R600 GPUs
  8. Proof that strlcpy is un-needed