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

LunarG Proposes A Shader And Kernel Compiler Stack

Mesa

Published on 18 October 2010 03:41 PM EDT
Written by Michael Larabel in Mesa
20 Comments

LunarG, the consulting company providing professional services for Mesa / Gallium3D that's led by Jens Owens, the founder of Tungsten Graphics, is beginning to commence work on a new project: LunarGLASS. Last year, LunarG wanted to provided better Linux graphics documentation, but this new LunarGLASS initiative is much more ambitious and it's about providing a complete shader and kernel compiler stack.

John Kessenich of LunarG has posted a proposal for LunarGLASS on the mesa-dev mailing list. "LunarG has decided to work on an open source, long-term, highly-functional, and modular shader and kernel compiler stack. Attached is our high-level proposal for this compiler architecture (LunarGLASS). We would like to solicit feedback from the open source community on doing this."

The LunarGLASS proposal is a six-page PDF and some of the takeaway quotes include "The short-term goal is to leverage investments in existing IRs while the long-term goal is to reduce the number of IRs and not require optimization difficulties caused by losing information going through an IR...Although a variety of IRs could be used for this purpose, a major part of this proposal is to base
the IRs on LLVM...Finally, new languages like OpenCL C, as well as ever more complex uses of GLSL, are raising the level of sophistication needed in compiler stacks. This calls for a solution more in line with handling the full-fledged language features and optimizations that LLVM is already prepared for."

There's also a block diagram of what's involved with LunarGLASS.

LunarG Proposes A Shader And Kernel Compiler Stack


What's largely being discussed right now on the mailing list in regards to LunarGLASS is whether LLVM (the Low-Level Virtual Machine) is right for the IR (intermediate representation) or not for both the high and low-level implementations.

Keith Whitwell of VMware / Tungsten Graphics says "I think this is the big question mark with this proposal -- basically can it be done?...At a high level, LLVM is very compelling - there's a lot of work going on for it, a lot of people enhancing it, etc. Now, if it's possible to leverage that for shader compilation, I think that's very interesting."

José Fonseca, also of VMware, says "I also think there are indeed challenges translating LLVM IR to something like TGSI, Mesa IR; and I was skeptical about standardizing on LLVM IR for quite some time, but lately I've been reaching the conclusion that there's so much momentum behind LLVM that the benefits/synergy one gets by leveraging it will most likely exceed the pitfalls."

We'll see how LunarGLASS comes about and will keep you posted. The Low-Level Virtual Machine is already used heavily by Gallium3D's LLVMpipe driver to provide a faster CPU-based, software driven renderer thanks to LLVM's optimizations. LLVM has also been long talked about for being used elsewhere by Linux graphics drivers.

Latest Linux Hardware Reviews
  1. Overclocking The AMD AM1 Athlon & Sempron APUs
  2. AMD Athlon 5350 / 5150 & Sempron 3850 / 2650
  3. Upgraded Kernel & Mesa Yield A Big Boost For Athlon R3 Graphics
  4. AMD Athlon 5350 APU On Linux
Latest Linux Articles
  1. A Quick Look At GCC 4.9 vs. LLVM Clang 3.5
  2. Are AMD Athlon/Sempron APUs Fast Enough For Steam On Linux?
  3. AMD Athlon's R3 Graphics: RadeonSI Gallium3D vs. Catalyst
  4. GCC 4.9 Compiler Optimization Benchmarks For Faster Binaries
Latest Linux News
  1. Fedora Workstation Is Making Me Quite Excited
  2. Maynard: A Lightweight Wayland Desktop
  3. Chromium Browser Going Through Growing Pains In Ubuntu 14.04
  4. KDE 4.13 Is Being Released Today With New Features
  5. Trying Out Radeon R9 290 Graphics On Open-Source
  6. Intel Broadwell GT3 Graphics Have Dual BSD Rings
  7. Early Linux 3.15 Benchmarks Of Intel Core i7 + Radeon
  8. Red Hat Releases Its RHEL 7 Release Candidate
  9. New Features Coming To Xubuntu 14.04 LTS
  10. NVIDIA Officially Releases CUDA 6
  11. Google Releases An AutoFDO Converter For Perf In LLVM
  12. Fedora 21 To Evaluate Remote Journal Logging, 64-bit ARM Emulation
Latest Forum Discussions
  1. The GNOME Foundation Is Running Short On Money
  2. Change installation destination from home directory
  3. After Jack Keane, RuseSoft will briing Ankh 3 to Linux through Desura
  4. Linux Kernel Developers Fed Up With Ridiculous Bugs In Systemd
  5. Bye bye BSD, Hello Linux: A Sys Admin's Story
  6. New tool for undervolt/overclock AMD K8L and K10 processors
  7. How to enable opengl 3.3 on r9 270?
  8. R290x sound problems