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. ASRock X99 Extreme3 Is An Affordable Choice For Linux Users
  2. A Walkthrough Of The New 32 System Open-Source Linux Benchmarking Test Farm
  3. Habey MITX-6771: Mini-ITX Board With Quad-Core J1900 Bay Trail
  4. OCZ Vector 150 SSD On Linux
Latest Linux Articles
  1. 17-Way Linux Graphics Card Comparison With Civilization Beyond Earth
  2. AMD Kaveri: Open-Source Radeon Gallium3D vs. Catalyst 14.12 Omega Driver
  3. 12-Way AMD Catalyst 14.12 vs. NVIDIA 346 Series Linux GPU Comparison
  4. AMD Catalyst 14.12 Omega Driver Brings Mixed Results For Linux Users
Latest Linux News
  1. Heterogeneous Memory Management Is Coming Along For The Linux Kernel
  2. NTP Is The Latest Project Struck By Security Issues
  3. LDC 0.15.1 Released For A D Compiler In LLVM
  4. Fedora Doesn't Yet Enable F2FS File-System Support
  5. XZ 5.2 Adds New Multi-Threaded Options
  6. Intel 2.99.917 X.Org Driver Released, 3.0 Release Finally Near
  7. Server-Side XCB Is Being Discussed For The X.Org Server
  8. Adreno A4xx Rendering With Freedreno Takes Shape
  9. Linux 3.19-rc1 Kernel Released Ahead Of Schedule
  10. X.Org Server 1.16.3 Released To Fix Security Issues
Latest Forum Discussions
  1. Need some hand holding with upgrading xserver
  2. Maker3D - create your 3D RPG
  3. FPS capped on Linux (AMD fglrx drivers)
  4. Looking for an nVidia GPU, but not sure how well they are supported.
  5. Speeding up systemd networking service
  6. Major Performance Breakthrough Discovered For Intel's Mesa Driver
  7. Are there an app using HSA ?
  8. The New SuperTuxKart Looks Better, But Can Cause GPU/Driver Problems