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

Radeon VRAM Optimizations Coming, But Help Is Needed

AMD

Published on 11 January 2014 05:00 PM EST
Written by Lauri Kasanen in AMD
129 Comments

Got a workload that runs badly on the r600g Radeon Gallium3D driver? You can help fix it! Optimizations are coming to the open-source Radeon Linux driver for video memory usage.

I'm currently working on my thesis (Software Engineering), studying the VRAM behavior of radeon. For r600g, much of the remaining gap to fglrx can be explained by less than optimal VRAM use. There's fragmentation, and there's ping-pong of buffers to and from VRAM.

You can help by recording a trace of the app's memory use. If you use Oibaf's PPA, you're set; if you build Mesa yourself, please apply the patches from the stats6 branch.

Run the app with the R600_DEBUG environment variable set to enable tracing (bostats), for example "R600_DEBUG=bostats dota2". The trace will be written to /tmp/bostats.[pid].dota2.

Once a few minutes of gameplay have been captured, exit the game. Please compress this file with XZ, upload somewhere (dropbox, anonfiles, bayfiles, etc) and e-mail me the link to cand at gmx dot com.

Please include a description of the app, settings used, and the version of the app. If it's a private application, please specify that too.

I would really appreciate traces from commercial apps, both native and those used via Wine. I can record most open-source apps myself, but if you have a specific case (for example, Xonotic with specific settings only) that runs badly, please record that.

Notes:

- The machine doesn't have to be the slow one. For example, if WoW is slow on your integrated card, but fast on a discrete, feel free to record on the discrete. The trace will be the same, assuming settings are the same.
- There is nothing confidential in the trace, so any private apps are safe to record.
- If your /tmp is in RAM, a big trace might fill it -- use TMPDIR=/home/foo etc to specify a dir on storage.
- While radeonsi could be used in theory, it has not been tested, and traces from it are incorrect (they lack much of the cpu statistics).

Thanks to Lauri Kasanen for reaching out to us so that Phoronix readers can help him in having a successful thesis and his continued work on improving the open-source Radeon Linux graphics driver. For any questions, please drop by the forums.

Latest Linux Hardware Reviews
  1. NVIDIA GeForce GTX 970 Offers Great Linux Performance
  2. CompuLab Intense-PC2: An Excellent, Fanless, Mini PC Powered By Intel's i7 Haswell
  3. From The Atom 330 To Haswell ULT: Intel Linux Performance Benchmarks
  4. AMD Radeon R9 285 Tonga Performance On Linux
Latest Linux Articles
  1. Ubuntu 14.10 XMir System Compositor Benchmarks
  2. Btrfs RAID HDD Testing On Ubuntu Linux 14.10
  3. Ubuntu 14.10 Linux 32-bit vs. 64-bit Performance
  4. AMD Moves Forward With Unified Linux Driver Strategy, New Kernel Driver
Latest Linux News
  1. Intel GVT-g GPU Virtualization Moves Closer
  2. GTK+ 3.16 To Bring Several New Features
  3. Debian 8.0 Jessie Has Many Multimedia Improvements
  4. What Linux Benchmarks Would You Like To See Next?
  5. Open-Source, Linux Support For Corsair Link Devices Slowly Materializing
  6. Cairo-Dock 3.4 Shows A Lot Of Progress, Works Toward EGL/Wayland Support
  7. Mesa 10.4 Tentatively Planned For Early December
  8. SteamOS Update 145 Brings Compositor, Update Fixes
  9. GStreamer 2014 Conference Videos Posted: Wayland, HTML5, 3D
  10. Nouveau Now Supports DRI3 Without GLAMOR
Latest Forum Discussions
  1. HOPE: The Ease Of Python With The Speed Of C++
  2. Updated and Optimized Ubuntu Free Graphics Drivers
  3. Linux hacker compares Solaris kernel code:
  4. Users/Developers Threatening Fork Of Debian GNU/Linux
  5. Ubuntu 16.04 Might Be The Distribution's Last 32-Bit Release
  6. AMD Releases UVD Video Decode Support For R600 GPUs
  7. Proof that strlcpy is un-needed
  8. xbox one tv tuner