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 Benchmarking Platform
Phoromatic Test Orchestration

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 News
  1. Phoronix Turns 11 Years Old Next Week: How Should We Celebrate?
  2. Ubuntu Community Council Reaffirms Its Decision Against Kubuntu's Leader
  3. Future Plans For Changing Fedora's Installer
  4. Confusion Mounts Over Wayland's Actual License
  5. GNOME's Mutter Now Supports Drag-n-Drop To/From Wayland & X11
  6. Wine 1.7.44 Works On More 64-bit ARM Support
  7. Phoronix Test Suite 5.8 Milestone 5 Brings Near Final "Belev" Experience
  8. For AMD Users, Linux 4.2 Will Bring The New AMDGPU Driver & VCE1 For Radeon
  9. Atomic Mode-Setting Still Baking For Samsung's Exynos DRM Driver
  10. Ubuntu Phone Update This Month Brings Many Improvements
Latest Articles & Reviews
  1. Btrfs RAID 0/1/5/6/10 Five-Disk Benchmarks On Linux 4.1
  2. Opening The Gates To Our Daily Open-Source Linux Benchmark Results
  3. The Latest Features For Linux Performance Management + Benchmark Monitoring
  4. Noctua NH-U12DX i4 + NF-F12
Most Viewed News This Week
  1. NVIDIA's Proprietary Driver Is Moving Closer With Kernel Mode-Setting
  2. Zapcc Claims To Be A "Much Faster C++ Compiler"
  3. OpenWRT 15.05 Preparing Improved Security & Better Networking
  4. Features Added To Mesa 10.6 For Open-Source GPU Drivers
  5. Ubuntu's LXD vs. KVM For The Linux Cloud
  6. The Latest Linux Kernel Git Code Fixes The EXT4 RAID0 Corruption Problem
  7. Friction Building Around An Ubuntu Community Council Decision
  8. Fedora 22 Is Being Released Next Tuesday