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 Over OpenMP Proposed For GCC Compiler

Compiler

Published on 07 November 2013 12:19 AM EST
Written by Michael Larabel in Compiler
5 Comments

As some more interesting GCC compiler news this week besides the integration of Intel Cilk Plus support and C11 _Atomic support being ready is a new competing implementation of the OpenACC parallel programming standard for the GNU Compiler Collection.

Back in September was a proposal out of Samsung for OpenACC in GCC with GPU support. That support hasn't been merged yet but now CodeSourcery is out with another implementation.

OpenACC is the parallel programming standard backed by Cray and NVIDIA and other firms to simplify CPU/GPU programming. The OpenACC approach is similar to OpenMP and this standard supports the C, C++, and Fortran languages. The big deal with OpenACC over OpenMP is support for GPU acceleration.

The approach done by Samsung in September had the OpenACC code being morphed into OpenCL 1.1 code for GPGPU execution since GCC doesn't have GPU support like in LLVM/Clang. The Samsung approach also targeted OpenACC 1.0 rather than OpenACC 2.0.

Now announced on Wednesday by Thomas Schwinge of CodeSourcery is an alternative implementation. This new implementation doesn't have any GPU side support, but it does have OpenACC 2.0 support and this implementation is all based off of GOMP, the GCC OpenMP support. With OpenMP and OpenACC being similar on the CPU side, CodeSourcery is leveraging the GOMP code-base. The OpenACC support ends up being embedded within the OpenMP infrastructure and passes. This implementation right now is still in early development form and only supports C while C++ and Fortran are to be forthcoming. There might also be some possibility for front/middle-end code sharing between the two OpenACC implementations for this open-source compiler.

Those interested in seeing this new GCC OpenACC work can visit the GCC mailing list. In the spirit of open-source, the best implementation shall win.

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. A Walkthrough Of The New 32 System Open-Source Linux Benchmarking Test Farm
  2. Habey MITX-6771: Mini-ITX Board With Quad-Core J1900 Bay Trail
  3. OCZ Vector 150 SSD On Linux
  4. Noctua i4 CPU Cooler: Great For Cooling High-End LGA-2011v3 CPUs
Latest Linux Articles
  1. AMD Kaveri: Open-Source Radeon Gallium3D vs. Catalyst 14.12 Omega Driver
  2. 12-Way AMD Catalyst 14.12 vs. NVIDIA 346 Series Linux GPU Comparison
  3. AMD Catalyst 14.12 Omega Driver Brings Mixed Results For Linux Users
  4. 6-Way Winter 2014 Linux Distribution Comparison
Latest Linux News
  1. FSF's High Priority Project List Now Has A Committee
  2. Details On Using OpenACC & GPUs With GCC
  3. Ubuntu 15.04 Alpha 1 For Its Various Flavors
  4. Git 2.2.1 Released To Fix Critical Security Issue
  5. WTFTW: A Tiling Window Manager Written In Rust
  6. Jolla's Sailfish OS Update 10 Is Now Available
  7. HP To Launch Linux++ Operating System Next Year
  8. Civilization: Beyond Earth Launches For Linux
  9. NIR Has Been Revised As A New IR For Mesa
  10. New 64-bit Linux Kernel Vulnerabilities Disclosed This Week
Latest Forum Discussions
  1. XLennart: A Game For Systemd Haters With Nothing Better To Do
  2. Debian init discussion in Phoenix Wright format
  3. Bench specific mount point
  4. Tool for measuring FPS in games
  5. Need some hand holding with upgrading xserver
  6. Ubuntu Developers Still Thinking What To Do About Adobe Flash Support
  7. Microsoft buying Mojang
  8. Updated and Optimized Ubuntu Free Graphics Drivers