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cTuning CC is a free, open source compiler collection that combines multiple tools and techniques including MILEPOST GCC, ICI, CCC framework, cTuning web-services and Collective Optimization Database and cBench as the first practical step toward self-tuning, adaptive computing systems based on industrial tools, empirical techniques, transparent collective optimization, statistical analysis and machine learning.
It may not always be visible to the IT users, but developing and optimizing computing systems using available over-complicated technology is too time consuming and costly often resulting in underperforming, power-hungry and inefficient computers and programs. Novel cTuning technology attempts to overcome the complexity of computing system by automating architecture, code and dataset analysis, characterization and multi- objective optimization (currently execution time, code size and compilation time) and enabling portable optimization using
- continuous parameterization of all components of a computing system (from architecture to operating system, compiler and code),
- continuous empirical collective optimization space exploration distributed among multiple users,
- continuous profiling and characterization of applications (extraction of program and architecture features), run-time behavior and resources,
- continuous sharing of analysis and optimization information in the Collective Optimization Database
- continuous refining and adaptation of performance models and optimization prediction based on standard statistical and machine learning techniques.
cTuning CC includes:
- New cTuning compiler wrapper to transparently extract program structure and features (using MILEPOST GCC), communicate with cTuning web services to share optimization data and predict optimizations, and invoke any other user compiler (GCC, LLVM, Open64, ICC, XL, ROSE, etc)
- MILEPOST GCC 4.4.x (self-tuning, adaptive, machine-learning based compiler) with ICI (plugin framework) v2.05 and MILEPOST feature extractor V2.1
- New Continuous Collective Compilation framework
- Collective Benchmark
- New plugins and web-services for multi-objective optimizations(balancing execution time, code size, compilation time)
We are developing cTuning infrastructure as a very simple, modular and portable tool so that users could easily download, install and use it to compile, execute, characterize and optimize their programs or share optimization knowledge. Our users managed to optimize some large industrial applications such as BerkeleyDB (1.4 speedup over GCC 4.4.0 -O3 on several
Intel Xeon machines), some audio and video codecs, multiple standard benchmarks, Linux kernel, etc.
Please, note that this is an on-going, evolving project driven by the cTuning community, so please be patient or join the project and help to improve cTuning infrastructure.
- FAQs - Does cTuning CC/MILEPOST GCC solve all optimization problems? How similar is it ACOVEA tool? etc...
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- 2010.June.9 - Finally, we recovered all cTuning website and services after physical hard drive failure. However, if you still experience some problems or abnormal behavior, please report that to the cTuning discussions mailing list! Thanks and sorry for any inconvenience!
- 2010.May.22 - Pre-release of cTuning CC V2.5 is now available. cTuning CC is a free, open source compiler collection that combines multiple tools and techniques including MILEPOST GCC, ICI, CCC framework, cTuning web-services and Collective Optimization Database and cBench as the first practical step toward self-tuning, adaptive computing systems based on industrial tools, empirical techniques, transparent collective optimization, statistical analysis and machine learning.
- 2010.April.28 - List of all projects accepted for Google Summer of Code 2010 is now available on-line. There are many projects related to GCC, LLVM, MONO, etc.
Discussion page about GCC as a research compiler has been updated.
Diego Novillo started a proposal to modularize GCC.
- 2010.April.14 - Long awaited GCC 4.5 has been released! It features new plugin framework with some parts of ICI to continue GCC modularization and parametrization, simplify pass manipulation and reordering, and enable better integration with cTuning/MILEPOST tools to automate optimization space exploration and prediction of profitable combinations of program transformations during multi-objective optimizations (balancing execution time, code size, compilation time, etc) for a given program/dataset/architecture.
- 2010.March.17 - We pre-released all tools including MILEPOST GCC, CCC framework, cBench and cDatabase. It's a major update of cTuning tools including support of transparent optimizations of programs and libraries, better multi-objective optimization (including balancing of execution time, code size and compilation time), bug fixes in averaging multiple optimization cases, C++ support in MILEPOST GCC, support of all version of GCC 4.4, new static features in MILEPOST GCC, extended documentation, etc. Feedback and comments are welcome here.
- 2010.March.01 - CGO'10 program is available on-line.
- 2010.February.22 - MILEPOST 1.5 GCC 4.4.0 pre-release is now available.
- 2010.February.18 - We are in the process of updating this website as well as MILEPOST GCC, CCC framework, web-services.).
- News archive
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