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

DMA-BUF Cross-Device Synchronization Still Baking

Linux Kernel

Published on 17 February 2014 11:05 AM EST
Written by Michael Larabel in Linux Kernel
7 Comments

One of the features that multi-GPU (Optimus/PRIME) owners and other DMA_BUF-using Linux users have been waiting on is cross-device synchronization support. Patches are still flowing for this missing feature and with some luck maybe we will finally see it ready for the Linux 3.15 kernel.

Maarten Lankhorst of Canonical has sent out his latest patch series that adds fence and poll support to DMA_BUF for providing cross-device synchronization support. The DMA-BUF sync support is now up to its 17th patch revision. These latest patches were published this morning and can be found on the dri-devel mailing list.

This work has been ongoing for several months and can lead to reduce tearing and other improvements with being able to synchronize the buffer sharing process between GPU DRM drivers. There's also use-cases in the ARM SoC world too for those using DMA-BUF for sharing of buffers between drivers. It's way too late to see DMA_BUF synchronization for Linux 3.14, but hopefully it will finally be ready in time for the Linux 3.15 kernel in a couple months.

Latest Linux Hardware Reviews
  1. Mini-Box M350: A Simple, Affordable Mini-ITX Case
  2. Overclocking The AMD AM1 Athlon & Sempron APUs
  3. AMD Athlon 5350 / 5150 & Sempron 3850 / 2650
  4. Upgraded Kernel & Mesa Yield A Big Boost For Athlon R3 Graphics
Latest Linux Articles
  1. AMD OpenCL Performance With AM1 Kabini APUs
  2. A Quick Look At GCC 4.9 vs. LLVM Clang 3.5
  3. Are AMD Athlon/Sempron APUs Fast Enough For Steam On Linux?
  4. AMD Athlon's R3 Graphics: RadeonSI Gallium3D vs. Catalyst
Latest Linux News
  1. R600 Gallium3D Disables LLVM Back-End By Default
  2. Fedora 21 Gets GNOME 3.12, PHP 5.6, Mono 3.4
  3. Fedora Workstation Is Making Me Quite Excited
  4. Maynard: A Lightweight Wayland Desktop
  5. Chromium Browser Going Through Growing Pains In Ubuntu 14.04
  6. KDE 4.13 Is Being Released Today With New Features
  7. Trying Out Radeon R9 290 Graphics On Open-Source
  8. Intel Broadwell GT3 Graphics Have Dual BSD Rings
  9. Early Linux 3.15 Benchmarks Of Intel Core i7 + Radeon
  10. Red Hat Releases Its RHEL 7 Release Candidate
  11. New Features Coming To Xubuntu 14.04 LTS
  12. NVIDIA Officially Releases CUDA 6
Latest Forum Discussions
  1. Change installation destination from home directory
  2. Updated and Optimized Ubuntu Free Graphics Drivers
  3. The GNOME Foundation Is Running Short On Money
  4. Linux Kernel Developers Fed Up With Ridiculous Bugs In Systemd
  5. After Jack Keane, RuseSoft will briing Ankh 3 to Linux through Desura
  6. Bye bye BSD, Hello Linux: A Sys Admin's Story
  7. New tool for undervolt/overclock AMD K8L and K10 processors
  8. How to enable opengl 3.3 on r9 270?