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

Overhauling Mesa's GLSL Compiler Performance

Mesa

Published on 12 November 2009 09:33 PM EST
Written by Michael Larabel in Mesa
10 Comments

We like hearing about performance improvements for Linux and also Linux graphics in general, but when there's something about performance improvements for Linux graphics, it certainly gets us excited and garners our interest. This time we get to report on work being done to Mesa's GLSL compiler, which is now running drastically faster in a branch of Mesa that will be published in about a week.

Intel's Ian Romanick has been working on optimizing GLSL IR and reworking the assembly shader (among other things) after ditching his efforts to write a new GLSL compiler, but VMware's Michal Krol has been rewriting the GLSL compiler pre-processor for Mesa as a step towards improving the GL Shading Language support and making it easier to strap in a new syntax parser in the future.

Once Michal wrote the new pre-processor, the existing syntax parser ended up being a huge bottleneck, and while Ian was going to be writing a new syntax parser, Michal ended up writing a new simple one. This new Mesa GLSL compiler syntax parser is similar in functionality to the "current" one, but it's much simpler and it's very fast.

Benchmarking was done of the new pre-processor and syntax parser for the Mesa GLSL compiler by measuring the time it takes to complete the two steps with an advanced shader. Michal's numbers show an impressive 27x speed-up with the new implementation over the old. Even more impressive, if simply measuring the performance of the new syntax parser, it's a 122x improvement over the current code in Mesa's master Git tree!

This code is being initially funneled into a branch of Mesa that will be called glsl-pp-rework-2 and VMware should make it available in about a week. The mailing list message detailing this pre-processor and syntax parsing work for Mesa's GLSL functionality can be found on mesa3d-dev.

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 Articles & Reviews
  1. Ubuntu 15.04 Is The Easy Path To Better Performance On Intel Broadwell
  2. NVIDIA's Latest Maxwell Line-Up Against AMD With Catalyst On Linux
  3. Preliminary Tests Of Intel Sandy Bridge & Ivy Bridge vs. Broadwell
  4. AMD FX-8320E Performance On Linux
  5. Linux Compiler Benchmarks Of LLVM Clang 3.5 vs. LLVM Clang 3.6-rc1
  6. Intel Broadwell HD Graphics 5500: Windows 8.1 vs. Linux
Latest Linux News
  1. LLVM Adds Options To Do Fuzz Testing
  2. Coreboot Now Supports Another Dual-Socket AMD Motherboard
  3. Atomic Mode-Setting/Display Support Progresses In Linux 3.20
  4. NVIDIA 340.76 Brings Three Stable Fixes
  5. Intel Broadwell-U P-State vs. ACPI CPUFreq Scaling Linux Performance
  6. DragonFlyBSD Is Almost To Linux 3.10 Era Intel Graphics Support
  7. New Beta Of Witcher 2 Aims For Greater Performance
  8. NVIDIA Tegra DRM Driver Supports Atomic Mode-Setting In Linux 3.20
  9. Linux "GHOST" Vulnerability Hits Glibc Systems
  10. Linux Game Publishing Remains Offline, Three Years After The CEO Shakeup
Most Viewed News This Week
  1. Windows 10 To Be A Free Upgrade: What Linux Users Need To Know
  2. LibreOffice 4.4 Is Coming Soon With New Features
  3. TraceFS: The Newest Linux File-System
  4. My Initial Intel Broadwell Linux Experience With The ThinkPad X1 Carbon
  5. Broadwell Linux Ultrabook Running MUCH Cooler Than Haswell
  6. LZHAM 1.0 Lossless Data Compression Codec Released
  7. Linux Users Upset By Chromium's Busted HiDPI Support
  8. Interstellar Marines On Linux With Catalyst: Bull S*#@