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

Benchmarking LLVM's Clang OpenMP Support Against GCC

Michael Larabel

Published on 29 May 2014
Written by Michael Larabel
Page 1 of 3 - 7 Comments

With it looking like LLVM Clang 3.5 might finally have OpenMP support, I tested out Intel's latest out-of-tree LLVM/Clang OpenMP code to see how the performance compares to GCC for this multi-processing API. Overall, the Clang results increase the level of competition against GCC.

This past weekend following word that it looks like LLVM/Clang 3.5 might finally have OpenMP support, I tested Intel's current code (clang-omp) by using their latest Git code of LLVM, Compiler-RT, and Clang as of Sunday (25 May). I also installed the latest version of Intel's OpenMP Runtime Library. With Intel's Clang-OMP code I compared it to the stock LLVM Clang 3.4 as packaged for Ubuntu 14.04 LTS and then against GCC 4.9.0 to see the OpenMP support currently offered by the latest version of the GNU Compiler Collection.

A range of Phoronix Test Suite tests that utilize OpenMP as their multi-threading interface were used to gauge the performance against GCC. It's also important to note that GCC 4.9.0 introduced OpenMP 4.0 support while LLVM Clang right now with the clang-omp branch supports just OpenMP 3.1 but OMP 4.0 support is currently being addressed for a later introduction. All of the testing happened from an ASUS Zenbook Prime UX32VDA laptop/ultrabook with Intel Core i7 3517U processor; other Clang OpenMP tests from systems with greater cores will come in due course, this is just some testing I did over the past weekend.

<< Previous Page
1
Latest Linux Hardware Reviews
  1. MSI X99S SLI PLUS On Linux
  2. NVIDIA GeForce GTX 970 Offers Great Linux Performance
  3. CompuLab Intense-PC2: An Excellent, Fanless, Mini PC Powered By Intel's i7 Haswell
  4. From The Atom 330 To Haswell ULT: Intel Linux Performance Benchmarks
Latest Linux Articles
  1. RunAbove: A POWER8 Compute Cloud With Offerings Up To 176 Threads
  2. 6-Way Ubuntu 14.10 Linux Desktop Benchmarks
  3. Ubuntu 14.10 XMir System Compositor Benchmarks
  4. Btrfs RAID HDD Testing On Ubuntu Linux 14.10
Latest Linux News
  1. openSUSE Factory & Tumbleweed Are Merging
  2. More Fedora Delays: Fedora 21 Beta Slips
  3. Mono Brings C# To The Unreal Engine 4
  4. Coreboot Now Has Support For Intel Broadwell Hardware
  5. Enlightenment's EFL 1.12 Alpha Has Evas GL-DRM Engine, OpenGL ES 1.1 Support
  6. GTK+ Lands Experimental Backend For Mir Display Server
  7. Ubuntu 14.10 Officially Released
  8. Mesa 10.4 Might Re-Enable HyperZ For R600g/RadeonSI
  9. Intel GVT-g GPU Virtualization Moves Closer
  10. GTK+ 3.16 To Bring Several New Features
Latest Forum Discussions
  1. Updated and Optimized Ubuntu Free Graphics Drivers
  2. Ubuntu 16.04 Might Be The Distribution's Last 32-Bit Release
  3. Linux hacker compares Solaris kernel code:
  4. HOPE: The Ease Of Python With The Speed Of C++
  5. Advertisements On Phoronix
  6. Users/Developers Threatening Fork Of Debian GNU/Linux
  7. AMD Releases UVD Video Decode Support For R600 GPUs
  8. Proof that strlcpy is un-needed