Download Shareware and Freeware Software for Windows, Linux, Macintosh, PDA

line Home  |  About Us  |  Link To Us  |  FAQ  |  Contact

Serving Software Downloads in 976 Categories, Downloaded 29.637.382 Times

Acovea 1.0.1

  Date Added: February 01, 2010  |  Visits: 956


Report Broken Link
Printer Friendly Version

Product Homepage
Download (78 downloads)

Acovea implements a genetic algorithm for finding the "best" options for compiling programs with the GCC C and C++ compilers. ACOVEA (Analysis of Compiler Options via Evolutionary Algorithm) implements a genetic algorithm to find the "best" options for compiling programs with the GNU Compiler Collection (GCC) C and C++ compilers. "Best", in this context, is defined as those options that produce the fastest executable program from a given source code. Acovea is a C++ framework that can be extended to test other programming languages and non-GCC compilers. I envision Acovea as an optimization tool, similar in purpose to profiling. Traditional function-level profiling identifies the algorithms most influential in a programs performance; Acovea is then applied to those algorithms to find the compiler flags and options that generate the fastest code. Acovea is also useful for testing combinations of flags for pessimistic interactions, and for testing the reliability of the compiler. Modern software is difficult to understand and verify by traditional means. Millions of lines of code produce applications containing intricate interactions, defying simple description or brute-force investigation. A guided, deterministic approach to testing relies on human testers to envision every possible combination of actions -- an unrealistic proposition given software complexity. Yet, despite that complexity, we need answers to important questions about modern, large-scale software. What sort of important questions? Consider the GNU Compiler Collection. I write articles that benchmark code generation, a task fraught with difficulties due to the myriad options provided by different compilers. For my benchmarks to have any meaning, I need to know which combination of options produces the fastest code for a given application. Finding the "best" set of options sounds like a simple task, given the extent of GCC documentation and the conventional wisdom of the GCC developer community. Ah, if it were only so easy! The GCC documentation, while extensive, is also honestly imprecise. I appreciate this style of documentation; unlike many commercial vendors, who make absolute statements about the "quality" of their products, GCCs documenters admit uncertainties in how various options alter code generation. Indeed, code generation is entirely dependent on the type of application being compiled and the target platform. An option that produces fast executable code for one source code may be detrimental to the performance of another program. "Conventional wisdom" arrives in my inbox whenever I publish a new article. Ranging from the polite to the insistent to the rude, these e-mails contain contradictory suggestions for producing fast code. In the vast majority of cases, such anecdotal assertions lack any formal proof of their validity, and, more often than not, the suggested "improvement" is ineffective or detrimental. It has become increasingly obvious that no one --myself included -- knows precisely how all these GCC options work together in generating program code. I seek the Holy Grail of Optimization -- but exactly what is optimization? Understanding the problem is the first step in finding a solution. Optimization attempts to produce the "best" machine code from source code. "Best" means different things to different applications; a database shovels chunks of information, while a scientific application is concerned with fast and accurate results; the first concern for an embedded system may be code size. And it is quite possible that small code is fast, or fast code accurate. Optimization is far from being an exact science, given the diversity of hardware and software configurations. An optimization algorithm may be as simple as removing a loop invariant, or as complex as examining an entire program to eliminate global common sub-expressions. Many optimizations change what the programmer wrote into a more efficient form, producing the same result while altering underlying details for efficiency; other "optimizations" produce code that uses specific characteristics of the underlying hardware, such as special instruction sets. Memory architectures, pipelines, on- and off-chip caches -- all affect code performance in ways that are not obvious to programmers using a high-level language. An optimization that may seem to produce faster code may, in fact, create large code that causes more cache misses, thus degrading performance. Even the best hand-tuned C code contains areas of interpretation; there is no absolute, one-to-one correspondence between C statements and machine instructions. Almost any sequence of source code can be compiled into different -- but functionally equivalent -- machine instruction streams with different sizes and performance characteristics. Inlining functions is a classic example of this phenomena: replacing a call to a function with the function code itself may produce a faster program, but may also increase program size. Increased program size, may, in turn, prevent an algorithm from fitting inside high-speed cache memory, thus slowing a program due to cache misses. Notice my use of the weasel word "may" -- inlining small functions sometimes allows other optimization algorithms a chance to further improve code for local conditions, producing faster and smaller code. Optimization is not simple or obvious, and combinations of algorithms can lead to unexpected results. Which brings me back to the question: For any given application, what are the most effective optimization options? Whats New in This Release: - Minor changes in the non-free license. - Support has been added for the latest versions of libcoyotl and libevocosm..

Requirements: No special requirements
Platforms: Linux
Keyword: Acovea Algorithm Code Compiling Programs Gcc Gcc C Genetic Algorithm Optimization Options Program Programming Quality Assurance And Testing Source Code
Users rating: 0/10

License: Freeware Size: 399.36 KB
More Reviews or Write Review

Network & Internet  -  Parallel Genetic Algorithm Library 0.99
Parallel Genetic Algorithm Library (or PGAL for short) is a C++ toolkit for simply, efficiently, and swiftly producing genetic algorithm code that works across multiple processors. This is useful not only for those with multi-processor...
75.78 KB  
Development Tools  -  pycrc 0.6.6
pycrc provides a CRC reference implementation in Python and a source code generator for C. The used CRC variant can be chosen from a fast but space-consuming implementation to slower but smaller implementations suitable especially for embedded...
Development Tools  -  Web C Plus Plus 0.8.4
Web C Plus Plus is a command line utility that takes your source code, and converts it into an HTML file using a fully customizable syntax highlighting engine and colour schemes. This is useful if you want to post your code online and make it...
Development Editors  -  Code Keeper 1.2
The Code Keeper a;pplication was developed to be a small utility for programmers, web authors, database designers or anyone else that needs to keep track of and reuse source code fragments. All of your code fragments can be recorded, annotated,...
Programming  -  JCite 1.9
JCite project contains cites snippets of Java source code or Excel sheets into HTML documents – API documentation, for instance. Citing from tests, or tested code, guarantees that examples really work. And, thanks to the excellent...
225.28 KB  
Programming  -  PMD 4.0
PMD is a Java source code analyzer. PMD finds unused variables, empty catch blocks, unnecessary object creation, and more. PMD project includes CPD, a tool to detect chunks of identical code PMD scans Java source code and looks for potential...
8 MB  
Programming  -  GCC Introspector 0.7
The Introspector enables the programming tools that deal with source code such as the compiler to communicate in a standard and neutral manner reducing the accidental cost of programming. Like a telephone switchboard connects many parties who...
12.29 KB  
Programming  -  JSCPP 1.10
JSCPP is an ANSI C preprocessor and language parser that can analyze and instrument C code. Currently, its most prominent application is to add tracing to existing C programs simply by recompiling and linking it with the "jscc" compiler...
307.2 KB  
Programming  -  Duplo 0.2.0
Duplo is a tool to find duplicated code blocks in large C, C++, Java, C#, and VB.Net systems. - Sample output snippet - ... srcenginegeometrysimpleTorusGeometry.cpp(56) srcenginegeometrysimpleSphereGeometry.cpp(54)...
21.5 KB  
Development Editors  -  BraceMatrix
BraceMatrix is a code viewer for C/C++ programmers that implements two new conceptual technics: 1)Brand new style of source code markup. 2)Convenient system of link search, providing intuitive visual navigation on code from declarations to...
2.7 MB  
Linux Software  -  Polling Autodialer Software 3.4
ICTBroadcast Auto Dialer software has a survey campaign for telephone surveys and polls. This auto dialer software automatically dials a list of numbers and asks them a set of questions that they can respond to, by using their telephone keypad....
488 B  
Linux Software  -  Total Video Converter Mac Free 3.5.5
Total Video Converter Mac Free developed by EffectMatrix Ltd is the official legal version of Total Video Converter which was a globally recognized brand since 2006. Total Video Converter Mac Free is a free but powerful all-in-one video...
17.7 MB  
Linux Software  -  Skeith mod_log_sql Analyzer 2.10beta2
Skeith is a php based front end for analyzing logs for Apache using mod_log_sql.
47.5 KB  
Linux Software  -  SLAX 6.0+
Slax is a modern, portable, small and fast Linux operating system with a modular approach and outstanding design. Despite its small size, Slax provides a wide collection of pre-installed software for daily use, including a well organized graphical...
190 KB  
Linux Software  -  GTK+ 2.5
GTK+, which stands for the GIMP Toolkit, is a library for creating graphical user interfaces for the X Window System. It is designed to be small, efficient, and flexible. GTK+ is written in C with a very object-oriented approach. Language bindings...
60 MB  
Programming  -  FLEX-db Digital Asset Manager 3.0.9
FLEX-db - an enterprise Digital Asset Manager (DAM). It ingests and links metadata with files, creates thumbnails, and processes files using business rules. FLEX-db has a JSP client, Java app server for file input and output and an EJB metadata...
21.57 MB  
Programming  -  Libicom 0.9.0
The libicom library is a character based dynamicly linked library for Linux. It is used to remotely control the Icom IC-R8500 wide band receiver via an RS232 link. All call and return parameters to the control functions are character string based....
20.48 KB  
Programming  -  dotdesktop 0.3
Dotdesktop library provides ability to parse desktop entry file and access the information in a convenient way. Desktop entry file format is defined by, it is used to describe information about an application such as the name and...
327.68 KB  
Programming  -  Cedalion for Linux 0.2.6
Cedalion is a programming language that allows its users to add new abstractions and define (and use) internal DSLs. Its innovation is in the fact that it uses projectional editing to allow the new abstractions to have no syntactic limitations.
471.04 KB  
Programming  -  libyasl 0.2
Libyasl is a C++ class library to easily realize TCP/UDP/Multicast clientsand servers in IPv4 and IPv6 environments under GNU/Linux systems.
143.36 KB