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

Gallium3D's LLVMpipe Now Handles Wider Registers

Mesa

Published on 18 July 2012 12:28 AM EDT
Written by Michael Larabel in Mesa
4 Comments

If you have an AVX-enabled processor like Intel's Sandy/Ivy Bridge or AMD's Bulldozer, there's some good news should you be relying upon Mesa's Gallium3D LLVMpipe driver.

Jose Fonseca of VMware has been working on wider registers in LLVMpipe. While this CPU-based software driver now supports SIMD registers wider than 128-bits, Fonseca isn't reporting any improvements as a result.

The lack of performance improvements with this wider register support for the performance-friendly Gallium3D software rasterizer, according to Jose, is namely due to LLVMpipe being dominated by integer SIMD instructions while the current AVX1 instruction set instruments are for handling floating-point instructions. This may even cause some performance overhead.

While there may not be performance gains at the moment out of this CPU-based driver leveraging LLVM, it does provide some architectural benefits.

This code does better stress MC-JIT from LLVM, which should be better improved with the LLVM 3.2 release due out in a few months.

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 Linux Hardware Reviews
  1. AMD Radeon R9 290: Gallium3D vs. Catalyst Drivers
  2. AMD Radeon R9 290 Open-Source Driver Works, But Has A Ways To Go
  3. Trying The Configurable 45 Watt TDP With AMD's A10-7800 / A6-7400K
  4. Sumo's Omni Gets Reloaded
Latest Linux Articles
  1. 20-Way Radeon Comparison With Open-Source Graphics For Steam On Linux Gaming
  2. Preview: OS X 10.10 Yosemite vs. Ubuntu Linux GPU Performance
  3. Radeon Graphics Yield Mixed Results With Linux 3.17 Kernel
  4. AMD's RadeonSI Driver Sped Up A Lot This Summer
Latest Linux News
  1. New Virtual Monitor Software Might End Up On Linux
  2. Company of Heroes 2 Might Be Coming Out For Linux
  3. NIR Still Being Discussed For Mesa, LLVM Gets Brought Up Again
  4. Plasma Active Is Mostly Ported To KDE Frameworks 5
  5. Google Chrome 37 Brings Many Security Fixes
  6. MenuetOS Updated With SMP Threads & Onscreen Keyboard
  7. Mesa Has A New Release Manager
  8. Enlightenment E19 Lands Its New Wayland Compositor Code
  9. Nouveau Turns Into A Mess In Latest Linux 3.17 + Mesa 10.3-dev Tests
  10. New GCC 5.0 Changes, Command-Line Options That Landed So Far
Latest Forum Discussions
  1. Updated and Optimized Ubuntu Free Graphics Drivers
  2. [DB] BIOS - ACPI - data collecting
  3. It's Now Possible To Play Netflix Natively On Linux Without Wine Plug-Ins
  4. AMD Releases UVD Video Decode Support For R600 GPUs
  5. Announcing radeontop, a tool for viewing the GPU usage
  6. Users defect to Linux as OpenBSD removes Lynx from base system
  7. Chinese People Try To Patent Wine On ARM
  8. American Citizens running AMOK for food stamps