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 Articles & Reviews
  1. Intel Broadwell: GCC 4.9 vs. LLVM Clang 3.5 Compiler Benchmarks
  2. Ubuntu vs. Fedora Linux On Lenovo's X1 Carbon With Core i7 Broadwell
  3. Ubuntu 15.04 Is The Easy Path To Better Performance On Intel Broadwell
  4. NVIDIA's Latest Maxwell Line-Up Against AMD With Catalyst On Linux
  5. Preliminary Tests Of Intel Sandy Bridge & Ivy Bridge vs. Broadwell
  6. AMD FX-8320E Performance On Linux
Latest Linux News
  1. Calamares 1.0 Distribution-Independent Installer Framework Released
  2. Librem 15 Linux Laptop Set To Close At Around $400k USD
  3. Virtual GEM To Increase Mesa's Software Rasterizer Performance
  4. Open Lunchbox: Yet Another Open-Source Laptop Attempt
  5. Wayland/Weston 1.7 Release Candidate
  6. Bugzilla 5.0 Is Coming Soon With New Features
  7. Linux Benchmarking... Even Faster & A Very Interesting February
  8. Does VirtualBox VM Have Much A Future Left?
  9. HAMMER2 File-System Is Still Slowly Coming Together
  10. The Better Looking Window Decorations For GNOME 3.16
Most Viewed News This Week
  1. PlayStation 4 System Compiler Support Landing In LLVM
  2. LibreOffice 4.4 Is Coming Soon With New Features
  3. Linux "GHOST" Vulnerability Hits Glibc Systems
  4. Broadwell Linux Ultrabook Running MUCH Cooler Than Haswell
  5. LZHAM 1.0 Lossless Data Compression Codec Released
  6. Linux Users Upset By Chromium's Busted HiDPI Support
  7. Vivaldi: A New Chromium-Powered, Multi-Platform Browser
  8. LLVM Adds Options To Do Fuzz Testing