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

GCC 4.6 Compiler Performance With AVX On Sandy Bridge

Michael Larabel

Published on 7 February 2011
Written by Michael Larabel
Page 2 of 6 - 16 Comments

When starting out with the PostgreSQL test, the results were quite shaky. GCC 4.4.5 was faster than GCC 4.3.5, but the database performance regressed when built by GCC 4.5.2 and dropped even further with GCC 4.6.0. When using the corei2 march/mtune flags for building the compiler and open-source Linux benchmarks via the Phoronix Test Suite, there was a definitive improvement over GCC 4.6.0 without the flags. However, when switching from the core2 to corei7 tuning, the performance actually dropped. When enabling the corei7-avx support, as should be for this Sandy Bridge CPU, the number of PostgreSQL transactions per second peaked for being on GCC 4.6 but still was not as fast as found in GCC 4.4.5 or GCC 4.5.2 Enabling the AVX floating-point math library support was of no benefit.

When running the Apache web-server, using the core2/corei7-avx options were of no benefit but actually led to a drop in the number of requests per second being handled. Enabling the AVX floating-point math support did improve the performance, but it still was behind that of a vanilla GCC 4.6.0 build or the numbers from GCC 4.3/4.4/4.5.

When using the respective GCC release to build the Apache web server, however, using the mtune and march optimizations led to a great decrease in the time required to build the open-source software. There was not, however, any build speed-up attributed to using the corei7/corei7-avx options for Apache but using just the core2 flag had squeezed as much as it could out of the system.

Latest Articles & Reviews
  1. Samsung 850 EVO SSD Linux Benchmarks
  2. Kubuntu 15.04 Is Turning Out Quite Nice, Good Way To Try Out The Latest KDE
  3. 5-Way Linux Distribution Comparison On The Core i3 NUC
  4. OCZ ARC 100 Linux SSD Benchmarks
  5. Lenovo ThinkPad X1 Carbon Works Great As A Linux Ultrabook
  6. Transcend SSD370 256GB
Latest Linux News
  1. The Khronos Group Filed A Trademark On "Vulkan" API
  2. Mozilla Thunderbird Adoption Climbs, Thunderbird 38 In May
  3. The Most Popular Linux Benchmark Results On OpenBenchmarking.org
  4. Intel's Graphics Driver For Linux 4.1 Will Have More XenGT vGPU Support
  5. PlayOnLinux 4.2.6 Fixes A Number Of Issues
  6. Mesa 10.5-RC3 Now Available To Test Improved GPU Drivers
  7. New Specifications On The Alleged Ubuntu Tablet
  8. LLVM 3.6 Officially Released With Many Compiler Advantages
  9. VLC 2.2 "Weathermax" Brings Better VP9 & H.265 Support
  10. Open-Source .NET On Linux Continues Maturing
Most Viewed News This Week
  1. Linux 4.0-RC1 Tagged, Linux 4.0 Will Bring Many Notable Improvements
  2. Screenshots Of The GNOME 3.16 Changes
  3. More Proof That Allwinner Is Violating The GPL
  4. Linux 4.0 Doesn't Have The Weirdest Codename
  5. Mir Now Depends Upon C++14
  6. GNOME 3.16 Beta Brings Wayland-Based Log-in Screen
  7. Krita 2.9 Released, Their Biggest Release Ever
  8. LLVM Clang Compiling The Linux Kernel Is A Big Topic For 2015
%%CLICK_URL_UNESC%%