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 Benchmarking Platform
Phoromatic Test Orchestration

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 Offers Faster OpenGL For AMD Radeon GPUs On Open-Source
  2. Ubuntu 15.04 Brings Some Graphics Performance Improvements For Intel Haswell
  3. Sub-$20 802.11n USB WiFi Adapter That's Linux Friendly
  4. The Lenovo T450s Is Working Beautifully With Linux
  5. Linux 4.0 SSD EXT4 / Btrfs / XFS / F2FS Benchmarks
  6. Linux 4.0 Hard Drive Comparison With Six File-Systems
Latest Linux News
  1. Vivaldi TP3 Browser Adds Native Window Support On Linux
  2. A Brief Update On Fwupd For Linux Firmware Updating Of Devices
  3. Upgrading To KDE Plasma 5.3 On Kubuntu 15.04
  4. Ubuntu 15.10 Plans Being Discussed Next Week
  5. KDE Plasma 5.3 Released: Expands On Widgets, Bluetooth, PM
  6. Making It Easier To Deploy CUDA On Fedora
  7. GCC 4.9.2 vs. GCC 5 Benchmarks On An Intel Xeon Haswell
  8. Intel Haswell/Broadwell Power Use On Linux Still Moving Lower
  9. QEMU 2.3 Officially Released
  10. It's Been Three Years Since The Big Steam Linux Reveal
Most Viewed News This Week
  1. Ubuntu's Desktop-Next Switching From .DEBs To Snappy
  2. Systemd Kills Off Shutdownd
  3. KDBUS Still Hasn't Been Pulled, Might Not Land For Linux 4.1
  4. My Favorite Computer Desk Of The Past Decade For Less Than $100
  5. AMD Open-Sources "Addrlib" From Catalyst
  6. Qt Creator 3.4 Brings C++ Programming Improvements & More
  7. Debian 8.0 Jessie Is Ready For Release This Weekend
  8. GIMP's Porting To GTK3 Continues