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

LLVM Clang Works On Profile-Guided Optimizations

Compiler

Published on 14 January 2014 02:24 AM EST
Written by Michael Larabel in Compiler
Comment On This Article

Profile-Guided Optimization (PGO) support is landing within LLVM's Clang C/C++ compiler in catching up to feature parity with GCC and their never-ending effort to improve performance of compiled binaries.

For those not normally excited by compilers, Profile-Guided Optimizations are a means of profiling a compiled program so that on subsequent compilations the compiler can better optimize the code for improved run-time performance. PGO is very different from traditional source-level optimizations and it's taken some time for Clang to implement the support besides the fact not many utilize this compiler optimization technique due to it being time intensive with requiring multiple compilations plus run-time profiling.

With a code commit that hit Clang mainline last week, there's now the initial instrumentation for Profile Guided Optimizations. While the code is still in early form, proper Clang PGO support will hopefully be a feature of LLVM 3.5.

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. NVIDIA GeForce GTX 970 Offers Great Linux Performance
  2. CompuLab Intense-PC2: An Excellent, Fanless, Mini PC Powered By Intel's i7 Haswell
  3. From The Atom 330 To Haswell ULT: Intel Linux Performance Benchmarks
  4. AMD Radeon R9 285 Tonga Performance On Linux
Latest Linux Articles
  1. 6-Way Ubuntu 14.10 Linux Desktop Benchmarks
  2. Ubuntu 14.10 XMir System Compositor Benchmarks
  3. Btrfs RAID HDD Testing On Ubuntu Linux 14.10
  4. Ubuntu 14.10 Linux 32-bit vs. 64-bit Performance
Latest Linux News
  1. Coreboot Now Has Support For Intel Broadwell Hardware
  2. Enlightenment's EFL 1.12 Alpha Has Evas GL-DRM Engine, OpenGL ES 1.1 Support
  3. GTK+ Lands Experimental Backend For Mir Display Server
  4. Ubuntu 14.10 Officially Released
  5. Mesa 10.4 Might Re-Enable HyperZ For R600g/RadeonSI
  6. Intel GVT-g GPU Virtualization Moves Closer
  7. GTK+ 3.16 To Bring Several New Features
  8. Debian 8.0 Jessie Has Many Multimedia Improvements
  9. What Linux Benchmarks Would You Like To See Next?
  10. Open-Source, Linux Support For Corsair Link Devices Slowly Materializing
Latest Forum Discussions
  1. Linux hacker compares Solaris kernel code:
  2. Advertisements On Phoronix
  3. HOPE: The Ease Of Python With The Speed Of C++
  4. Updated and Optimized Ubuntu Free Graphics Drivers
  5. Users/Developers Threatening Fork Of Debian GNU/Linux
  6. Ubuntu 16.04 Might Be The Distribution's Last 32-Bit Release
  7. AMD Releases UVD Video Decode Support For R600 GPUs
  8. Proof that strlcpy is un-needed