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

Cross-Device Synchronization For DMA-BUF Still Coming

Linux Kernel

Published on 30 July 2013 04:43 AM EDT
Written by Michael Larabel in Linux Kernel
Comment On This Article

Cross-device synchronization support for DMA-BUF is still being worked on for a future Linux kernel release.

This feature comes down to synchronizing the rendering of multiple devices via DMA-BUF, the buffer sharing mechanism introduced in the Linux kernel for sharing graphics buffers between DRM drivers and other related drivers in the context of ARM SoCs.

As said by Canonical's Maarten Lankhorst for what this new work can provide as an example, "userspace can call page_flip ioctl to display the next frame of graphics after kicking the GPU but while the GPU is still rendering. The display device sharing the buffer with the GPU would attach a callback to get notified when the GPU's rendering-complete IRQ fires, to update the scan-out address of the display, without having to wake up userspace."

The current DMA-BUF cross-device synchronization patch is now up to its 12th revision and can be found on the Linux kernel mailing list.

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. Apple OS X 10.10 vs. Ubuntu 14.10 Performance
  2. Mesa 10.5-devel Brings Some Intel Haswell HD Graphics Changes Over Mesa 10.3
  3. NVIDIA vs. Nouveau Drivers With Linux 3.18 + Mesa 10.4-devel
  4. Is The Open-Source NVIDIA Driver Fast Enough For Steam On Linux Gaming?
Latest Linux News
  1. GCW Zero Starts Seeing New Game Releases
  2. Intel's Cherry Trail Delayed To Next Year
  3. Bq Introduces More Android Devices, But Still No Ubuntu Phones
  4. Qt 5.4 Release Candidate Expected Later This Week
  5. ArrayFire Accelerated Compute Library Open-Sourced
  6. Amazon's Fire TV Stick: A Nice, Affordable Media Center Option
  7. Google Puts Chrome NPAPI Support On Final Countdown
  8. There's New In-Fighting Over The Future Of Compiz
  9. GTK+ Inspector Gains More Features Ahead Of GNOME 3.16
  10. Clang 3.6 Will Hopefully Have OpenMP Support
Latest Forum Discussions
  1. Hurrican SDL Port
  2. Roadmap to Catalyst 14.10 ?
  3. how to configure module phoromatic ?
  4. PulseAudio 6.0 Is Coming & Other Linux Audio Plans For The Future
  5. Debian Developer Resigns From The Systemd Maintainership Team
  6. Updated and Optimized Ubuntu Free Graphics Drivers
  7. Cant get working Kaveri APU - A10-7850k
  8. Script for Fan Speed Control