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

DRM KMS Locking Rework Readied For Linux 3.9

Linux Kernel

Published on 21 January 2013 01:13 AM EST
Written by Michael Larabel in Linux Kernel
3 Comments

The DRM KMS locking re-work patch series is ready and has been queued up for merging into the Linux 3.9 kernel.

From the branch merge into drm-next:
The aim of this locking rework is that ioctls which a compositor should be might call for every frame (set_cursor, page_flip, addfb, rmfb and getfb/create_handle) should not be able to block on kms background activities like output detection. And since each EDID read takes about 25ms (in the best case), that always means we'll drop at least one frame.

The solution is to add per-crtc locking for these ioctls, and restrict background activities to only use the global lock. Change-the-world type of events (modeset, dpms, ...) need to grab all locks.
The Linux 3.9 kernel will also present improved HDA Intel audio driver support, Intel graphics improvements, deprecates Radeon UMS, and various other work to be talked about in Phoronix articles over the coming weeks.

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. NVIDIA vs. Nouveau Drivers With Linux 3.18 + Mesa 10.4-devel
  2. Is The Open-Source NVIDIA Driver Fast Enough For Steam On Linux Gaming?
  3. Linux 3.18 File-System Performance Minimally Changed But Possible Regressions
  4. AMD Radeon Gallium3D Is Catching Up & Sometimes Beating Catalyst On Linux
Latest Linux News
  1. Linux 3.18-rc6 Released, A Worrisome Regression Remains
  2. HandBrake 0.10 Brings H.265 & VP8 Encoders
  3. Gngr: A New Web Browser Focused On Privacy
  4. Linux 3.18 Kernel: Not Much Change With Intel Haswell Performance
  5. More File-System Tests Of The Linux 3.18 Kernel
  6. Using NVIDIA's NVENC On Linux With FFmpeg
  7. There's Talk Again About An "Open To The Core" Ubuntu Laptop
  8. PowerVR SGX Driver Code Gets Leaked
  9. V2 Of KDBUS Published For Linux Kernel Review
  10. VirtualBox 4.3.20 Arrives, Still No Sign Of VirtualBox 4.4
Latest Forum Discussions
  1. PulseAudio 6.0 Is Coming & Other Linux Audio Plans For The Future
  2. Debian Developer Resigns From The Systemd Maintainership Team
  3. Roadmap to Catalyst 14.10 ?
  4. Updated and Optimized Ubuntu Free Graphics Drivers
  5. Cant get working Kaveri APU - A10-7850k
  6. Script for Fan Speed Control
  7. Debian Init System Coupling Vote Results
  8. The Slides Announcing The New "AMDGPU" Kernel Driver