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 Benchmarking Platform
Phoromatic Test Orchestration

Unified Parallel C (UPC) Comes To LLVM/Clang

Compiler

Published on 30 November 2012 10:19 AM EST
Written by Michael Larabel in Compiler
2 Comments

Clang UPC has been announced, which is a Unified Parallel C implementation targeting the LLVM/Clang compiler stack. Unified Parallel C is a C99 extension targeting high-performance computing on parallel machines.

Unified Parallel C is coming to GCC after its support was living separately from mainline GCC for some time. Now, developers have announced an initial implementation of Unified Parallel C for LLVM's Clang compiler. Clang UPC is this initial implementation.

Aside from needing the separate Clang UPC code-base, for now a special version of LLVM is required. This branched version of LLVM has a few minor changes necessary for supporting Unified Parallel C that aren't yet in the mainline code-base.

UPC is described as "an extension of the C programming language designed for high-performance computing on large-scale parallel machines, including those with a common global address space (SMP and NUMA) and those with distributed memory (e.g. clusters). The programmer is presented with a single shared, partitioned address space, where variables may be directly read and written by any processor, but each variable is physically associated with a single processor. UPC uses a Single Program Multiple Data (SPMD) model of computation in which the amount of parallelism is fixed at program startup time, typically with a single thread of execution per processor."

Eventually there is a plan to merge Clang UPC into the main Clang/LLVM code-base. In addition, there is a desire to develop a UPC-to-C source translator based upon Clang UPC. This work though is too late for the LLVM/Clang 3.2 release that will happen in December.

For more details on the Clang UPC announcement, see the Clang mailing list.

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 News
  1. Mandriva Linux Was Allegedly Brought Down By Employee Lawsuits
  2. GNOME 3.17.2 Is Released As The Latest Look Towards GNOME 3.18
  3. Phoronix Turns 11 Years Old Next Week: How Should We Celebrate?
  4. Ubuntu Community Council Reaffirms Its Decision Against Kubuntu's Leader
  5. Future Plans For Changing Fedora's Installer
  6. Confusion Mounts Over Wayland's Actual License
  7. GNOME's Mutter Now Supports Drag-n-Drop To/From Wayland & X11
  8. Wine 1.7.44 Works On More 64-bit ARM Support
  9. Phoronix Test Suite 5.8 Milestone 5 Brings Near Final "Belev" Experience
  10. For AMD Users, Linux 4.2 Will Bring The New AMDGPU Driver & VCE1 For Radeon
Latest Articles & Reviews
  1. Btrfs RAID 0/1/5/6/10 Five-Disk Benchmarks On Linux 4.1
  2. Opening The Gates To Our Daily Open-Source Linux Benchmark Results
  3. The Latest Features For Linux Performance Management + Benchmark Monitoring
  4. Noctua NH-U12DX i4 + NF-F12
Most Viewed News This Week
  1. NVIDIA's Proprietary Driver Is Moving Closer With Kernel Mode-Setting
  2. Zapcc Claims To Be A "Much Faster C++ Compiler"
  3. OpenWRT 15.05 Preparing Improved Security & Better Networking
  4. Features Added To Mesa 10.6 For Open-Source GPU Drivers
  5. Ubuntu's LXD vs. KVM For The Linux Cloud
  6. Friction Building Around An Ubuntu Community Council Decision
  7. The Latest Linux Kernel Git Code Fixes The EXT4 RAID0 Corruption Problem
  8. Fedora 22 Is Being Released Next Tuesday