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

QXL Gallium3D Wrapper Driver Is Brought Up

Virtualization

Published on 20 March 2013 06:16 AM EDT
Written by Michael Larabel in Virtualization
1 Comment

After a QXL KMS DRM driver was finally published for improving the desktop virtualization experience with Red Hat's Linux virtualization stack in conjunction with SPICE on QEMU, a Gallium3D wrapper driver is now being talked about.

Before getting too excited, however, this wrapper driver is about only optimizing the 3D experience for ultimately passing calls to Gallium3D's Softpipe / LLVMpipe software-based drivers. This isn't about passing calls onto any hardware driver/GPU on the VM's host system for an accelerated experience, as is an option when using VMware's virtualization products or Oracle VirtualBox. This new initiative is just about being more efficient with less overhead in running LLVMpipe when the QXL DRM driver is loaded.

QXL is the virtual GPU for Red Hat's SPICE rendering protocol for use in their virtualization stack. Aside from the new DRM/KMS driver, for basic 2D with X.Org has been the basic QXL DDX driver for some time, but when it comes to QXL 3D there hasn't been much love... However, for a long time there have been real Gallium3D aspirations.

David Airlie of Red Hat wrote about this new QXL wrapper work in a mailing list thread for Mesa developers. "So we have this virtual GPU with nothing approaching a 3D engine, so we are currently running llvmpipe with drisw on it. However this incurs some overheads that now that we have a kernel driver, I believe we can remove. The main overheads are putimage for all rendering from a 3D compositor and getimage calls for all texture-from-pixmap operations. So implementing a dri2 qxl driver that wraps llvmpipe operations using the sw winsys wrapper, seemed like a good idea."

So while this is a step forward for improving the desktop virtualization experience, using LLVMpipe is still a long ways from the GPU-capable VirtualBox and VMware solutions. For the near future at least, VMware's proprietary products are the only serious solution for those needing Linux desktop 3D guest support.

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. NVIDIA GeForce GTX 970 Offers Great Linux Performance
  2. CompuLab Intense-PC2: An Excellent, Fanless, Mini PC Powered By Intel's i7 Haswell
  3. From The Atom 330 To Haswell ULT: Intel Linux Performance Benchmarks
  4. AMD Radeon R9 285 Tonga Performance On Linux
Latest Linux Articles
  1. 6-Way Ubuntu 14.10 Linux Desktop Benchmarks
  2. Ubuntu 14.10 XMir System Compositor Benchmarks
  3. Btrfs RAID HDD Testing On Ubuntu Linux 14.10
  4. Ubuntu 14.10 Linux 32-bit vs. 64-bit Performance
Latest Linux News
  1. Ubuntu 14.10 Officially Released
  2. Mesa 10.4 Might Re-Enable HyperZ For R600g/RadeonSI
  3. Intel GVT-g GPU Virtualization Moves Closer
  4. GTK+ 3.16 To Bring Several New Features
  5. Debian 8.0 Jessie Has Many Multimedia Improvements
  6. What Linux Benchmarks Would You Like To See Next?
  7. Open-Source, Linux Support For Corsair Link Devices Slowly Materializing
  8. Cairo-Dock 3.4 Shows A Lot Of Progress, Works Toward EGL/Wayland Support
  9. Mesa 10.4 Tentatively Planned For Early December
  10. SteamOS Update 145 Brings Compositor, Update Fixes
Latest Forum Discussions
  1. Linux hacker compares Solaris kernel code:
  2. Advertisements On Phoronix
  3. HOPE: The Ease Of Python With The Speed Of C++
  4. Updated and Optimized Ubuntu Free Graphics Drivers
  5. Users/Developers Threatening Fork Of Debian GNU/Linux
  6. Ubuntu 16.04 Might Be The Distribution's Last 32-Bit Release
  7. AMD Releases UVD Video Decode Support For R600 GPUs
  8. Proof that strlcpy is un-needed