Changes between Version 1 and Version 2 of WikiStart


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Timestamp:
08/26/14 11:19:02 (10 years ago)
Author:
hfinkel
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  • WikiStart

    v1 v2  
    1 = Welcome to Trac 0.11.7 = 
     1= ALCF's High-Performance CRC64 Library = 
    22 
    3 Trac is a '''minimalistic''' approach to '''web-based''' management of 
    4 '''software projects'''. Its goal is to simplify effective tracking and handling of software issues, enhancements and overall progress. 
     3== Description == 
    54 
    6 All aspects of Trac have been designed with the single goal to  
    7 '''help developers write great software''' while '''staying out of the way''' 
    8 and imposing as little as possible on a team's established process and 
    9 culture. 
     5This library implements a high-performance computation of the 64-bit cyclic-redundancy check (CRC) of arbitrary input data. This implementation requires only a C99 compiler, but has been tuned for the IBM BG/Q supercomputer, and can take advantage of a compiler's OpenMP support to compute the CRC in parallel on multiple cores. 
    106 
    11 As all Wiki pages, this page is editable, this means that you can 
    12 modify the contents of this page simply by using your 
    13 web-browser. Simply click on the "Edit this page" link at the bottom 
    14 of the page. WikiFormatting will give you a detailed description of 
    15 available Wiki formatting commands. 
     7Computing and storing or transmitting the CRC code of data while it is written to disk or transmitted over the network, and then using it to verify the integrity of the data upon read-in or receipt, is a powerful way to guard against data corruption. While modern disks and networks are highly reliable, the rate of corruption from malfunctioning software, hardware and external physical processes remains significant (especially for large data sets). 
    168 
    17 "[wiki:TracAdmin trac-admin] ''yourenvdir'' initenv" created 
    18 a new Trac environment, containing a default set of wiki pages and some sample 
    19 data. This newly created environment also contains  
    20 [wiki:TracGuide documentation] to help you get started with your project. 
     9This implementation uses the ECMA-182 polynomial with -1 initialization, and computes the bit-reversed CRC. 
    2110 
    22 You can use [wiki:TracAdmin trac-admin] to configure 
    23 [http://trac.edgewall.org/ Trac] to better fit your project, especially in 
    24 regard to ''components'', ''versions'' and ''milestones''.  
     11== References == 
    2512 
     13Useful references on CRCs: 
    2614 
    27 TracGuide is a good place to start. 
     15 * [http://en.wikipedia.org/wiki/Computation_of_CRC] 
     16 * [http://checksumcrc.blogspot.com/2011/12/should-you-use-crc-or-checksum.html] 
     17 * [http://crcutil.googlecode.com/files/crc-doc.1.0.pdf] 
     18 * [http://www.ross.net/crc/download/crc_v3.txt] 
    2819 
    29 Enjoy! [[BR]] 
    30 ''The Trac Team'' 
    31  
    32 == Starting Points == 
    33  
    34  * TracGuide --  Built-in Documentation 
    35  * [http://trac.edgewall.org/ The Trac project] -- Trac Open Source Project 
    36  * [http://trac.edgewall.org/wiki/TracFaq Trac FAQ] -- Frequently Asked Questions 
    37  * TracSupport --  Trac Support 
    38  
    39 For a complete list of local wiki pages, see TitleIndex.