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

R600g Gallium3D HyperZ Defeats Developers

AMD

Published on 13 July 2012 02:53 PM EDT
Written by Michael Larabel in AMD
16 Comments

Jerome Glisse has published a new patch to enable HyperZ support for the AMD Radeon (R600g) Gallium3D driver. While this patch could be pushed to Mesa, it's not being enabled by default as it's still causing some GPU lock-ups and developers can't seem to figure out the cause. Jerome is now moving onto other work.

A message hit the Mesa development mailing list today entitled r600g: hyperz, from veteran open-source ATI/AMD contributor Jerome Glisse of Red Hat. He's posted a new R600g HyperZ patch, but it looks like it might be his last.

Jerome says he's been working on the R600g open-source HyperZ enablement for the past seven monthsm but he fails at not making it lock-up. He can't figure out why HyperZ is causing GPU lock-ups on the open-source driver, but he's trying to push it upstream anyhow to avoid rebasing the work constantly.

The French developer went on to say that he would try to match the fglrx (Catalyst) Linux driver's sync and flush pattern, but that would basically mean rewriting the entire r600g driver. He tried just cleaning up the R600g flushing, but that still doesn't avoid lock-ups.

Jerome ends his email with, "So if the feature doesn't lockup you will see on average 5% increase in performance. Anyway off to work on something else."

At the same time, Jerome also released an updated HTILE R600g patch (the mailing list message). The HTILE support patch for R600g is used for the HiZ and HiS support with fast Z/S clears.

For more information on the matter, see Radeon HyperZ In Open-Source On Older Hardware, AMD R600g Still Tackling Hierarchical Z, and An Optimized Open-Source Driver Tries To Compete With AMD Catalyst.

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. Mesa Git Yields Performance Improvements For Newer AMD GPUs
  2. Apple OS X 10.10 vs. Ubuntu 14.10 Performance
  3. Mesa 10.5-devel Brings Some Intel Haswell HD Graphics Changes Over Mesa 10.3
  4. NVIDIA vs. Nouveau Drivers With Linux 3.18 + Mesa 10.4-devel
Latest Linux News
  1. IMP Launches As Another Open-Source Computer Attempt
  2. Git 2.2.0 Released With 550+ Changes
  3. GNOME 3.15.2 Released
  4. Quantum OS Aims For A Linux Desktop With QML, Wayland & Material Design
  5. New Open-Source, Linux Benchmarks To Feast On
  6. FreeBSD Plans For The Next Ten Years
  7. Qt 5.4 Planned For Release On 9 December
  8. Meizu's Ubuntu Phone Not Expected Until Early Next Year
  9. DragonFlyBSD 4.0 Drops i386 Support, Improves Graphics
  10. Expensive "Free/Libre Software Laptop" Uses A NVIDIA GPU
Latest Forum Discussions
  1. Updated and Optimized Ubuntu Free Graphics Drivers
  2. Hurrican SDL Port
  3. Roadmap to Catalyst 14.10 ?
  4. how to configure module phoromatic ?
  5. PulseAudio 6.0 Is Coming & Other Linux Audio Plans For The Future
  6. Debian Developer Resigns From The Systemd Maintainership Team
  7. Cant get working Kaveri APU - A10-7850k
  8. Script for Fan Speed Control