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

Linux 3.12 Enables Haswell's Iris eLLC Cache Support

Intel

Published on 02 September 2013 10:53 AM EDT
Written by Michael Larabel in Intel
5 Comments

The Intel Haswell processors with Iris Pro 5200 "GT3e" graphics sports 128MB of embedded DRAM for maximizing the Intel graphics performance. With the Linux 3.12 kernel, this "eLLC cache" is being enabled in full plus other Intel DRM driver changes for benefiting Intel Linux customers.

Unfortunately we still don't have any Iris Pro 5200 benchmarks on Phoronix due to simply not yet having any GT3e hardware, but Daniel Vetter has written on his blog about the Linux 3.12 i915 DRM changes and with that he notes the GT3e hardware has the eLLC cache enabled.

Ben Widawsky enabled the giant eLLC cache while Chris Wilson enabled a write-through scanout buffer-caching mode that benefits hardware with this embedded DRAM package.

Other Intel graphics changes for the Linux 3.12 kernel include enabling PC8+ support as a deeper system sleep state for Haswell ULT platforms, Panel Self Refresh (PSR) support is now in place as another Haswell power-saving feature, and an assortment of other improvements.

Some of the smaller work includes GPU error state reporting via sysfs, HDMI infoframe changes, Fastboot support, and VMA object support for GEM.

More information on the Intel DRM driver changes queued up for merging into the Linux 3.12 kernel as soon as Linux 3.11 has been released can be found on Daniel's blog. You can also read about other great features for the Linux 3.12 kernel on top of the Linux 3.11 features.

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. Fedora 21 Beta & Final Release Slip Further
  2. Mesa 10.3.2 Has A Couple Bug-Fixes
  3. RadeonSI/R600g HyperZ Support Gets Turned Back On
  4. openSUSE Factory & Tumbleweed Are Merging
  5. More Fedora Delays: Fedora 21 Beta Slips
  6. Mono Brings C# To The Unreal Engine 4
  7. Coreboot Now Has Support For Intel Broadwell Hardware
  8. Enlightenment's EFL 1.12 Alpha Has Evas GL-DRM Engine, OpenGL ES 1.1 Support
  9. GTK+ Lands Experimental Backend For Mir Display Server
  10. Ubuntu 14.10 Officially Released
Latest Forum Discussions
  1. AMD Radeon VDPAU Video Performance With Gallium3D
  2. HOPE: The Ease Of Python With The Speed Of C++
  3. Updated and Optimized Ubuntu Free Graphics Drivers
  4. Ubuntu 16.04 Might Be The Distribution's Last 32-Bit Release
  5. Linux hacker compares Solaris kernel code:
  6. Advertisements On Phoronix
  7. Users/Developers Threatening Fork Of Debian GNU/Linux
  8. AMD Releases UVD Video Decode Support For R600 GPUs