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

OpenACC Still Not Loved By Open Compilers

Compiler

Published on 04 December 2012 08:17 PM EST
Written by Michael Larabel in Compiler
3 Comments

While an open industry standard, the leading open-source compilers still lack support for the OpenACC parallel programming standard.

The OpenACC 1.0 API has been public for more than one year as an open standard to simplify parallel programming on CPUs and GPUs, but to this point it's basically only backed by commercial compilers. OpenACC is similar to OpenMP in terms of using PRAGMA compiler directives and special functions for tapping multiple CPU cores in an easy and straight-forward manner with C/C++ and Fortran code, but unlike OpenMP, OpenACC is also aware of GPUs.

The main compilers supporting OpenACC 1.0 are PGI, Cray, and CAPS/HMPP. Even with the forthcoming releases of GCC 4.8 and LLVM/Clang 3.2, there's still no OpenACC support. (LLVM/Clang is also still lacking mainline support for OpenMP.)

Introduced last month at the Super Computing '12 conference in Salt Lake City, a draft version of OpenACC 2.0 was also made public for review. OpenACC introduces new controls for handling data movement, better handling of unstructured data, improvements in dealing with non-contiguous memory, support for explicit function calls, and other new functionality to make happy HPC programmers. The tentative OpenACC 2.0 specification can be found on the standard's website.

Hopefully in 2013 we will begin to see open-source compilers like LLVM/Clang and GCC beginning to support OpenACC for exposing new parallel computing capabilities. On a semi-related note, last month Intel showcased Shevlin Park, an effort to make Microsoft's C++ AMP (Accelerated Massive Parallelism) multi-platform by porting it to LLVM/Clang.

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. 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. Open-Source Radeon 2D Performance Is Better With Ubuntu 14.10
  2. RunAbove: A POWER8 Compute Cloud With Offerings Up To 176 Threads
  3. 6-Way Ubuntu 14.10 Linux Desktop Benchmarks
  4. Ubuntu 14.10 XMir System Compositor Benchmarks
Latest Linux News
  1. Fedora 21 Beta & Final Release Slip Further
  2. Mesa 10.3.2 Has A Couple Bug-Fixes
  3. RadeonSI/R600g HyperZ Support Gets Turned Back On
  4. openSUSE Factory & Tumbleweed Are Merging
  5. More Fedora Delays: Fedora 21 Beta Slips
  6. Mono Brings C# To The Unreal Engine 4
  7. Coreboot Now Has Support For Intel Broadwell Hardware
  8. Enlightenment's EFL 1.12 Alpha Has Evas GL-DRM Engine, OpenGL ES 1.1 Support
  9. GTK+ Lands Experimental Backend For Mir Display Server
  10. Ubuntu 14.10 Officially Released
Latest Forum Discussions
  1. AMD Radeon VDPAU Video Performance With Gallium3D
  2. HOPE: The Ease Of Python With The Speed Of C++
  3. Updated and Optimized Ubuntu Free Graphics Drivers
  4. Ubuntu 16.04 Might Be The Distribution's Last 32-Bit Release
  5. Linux hacker compares Solaris kernel code:
  6. Advertisements On Phoronix
  7. Users/Developers Threatening Fork Of Debian GNU/Linux
  8. AMD Releases UVD Video Decode Support For R600 GPUs