Linux Kernel and Driver Development Training Slides
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Application of TRIE Data Structure and Corresponding Associative Algorithms for Process Optimization in GRID Environment
Application of TRIE data structure and corresponding associative algorithms for process optimization in GRID environment V. V. Kashanskya, I. L. Kaftannikovb South Ural State University (National Research University), 76, Lenin prospekt, Chelyabinsk, 454080, Russia E-mail: a [email protected], b [email protected] Growing interest around different BOINC powered projects made volunteer GRID model widely used last years, arranging lots of computational resources in different environments. There are many revealed problems of Big Data and horizontally scalable multiuser systems. This paper provides an analysis of TRIE data structure and possibilities of its application in contemporary volunteer GRID networks, including routing (L3 OSI) and spe- cialized key-value storage engine (L7 OSI). The main goal is to show how TRIE mechanisms can influence de- livery process of the corresponding GRID environment resources and services at different layers of networking abstraction. The relevance of the optimization topic is ensured by the fact that with increasing data flow intensi- ty, the latency of the various linear algorithm based subsystems as well increases. This leads to the general ef- fects, such as unacceptably high transmission time and processing instability. Logically paper can be divided into three parts with summary. The first part provides definition of TRIE and asymptotic estimates of corresponding algorithms (searching, deletion, insertion). The second part is devoted to the problem of routing time reduction by applying TRIE data structure. In particular, we analyze Cisco IOS switching services based on Bitwise TRIE and 256 way TRIE data structures. The third part contains general BOINC architecture review and recommenda- tions for highly-loaded projects. -
Backbox Penetration Testing Never Looked So Lovely
DISTROHOPPER DISTROHOPPER Our pick of the latest releases will whet your appetite for new Linux distributions. Picaros Diego Linux for children. here are a few distributions aimed at children: Doudou springs to mind, Tand there’s also Sugar on a Stick. Both of these are based on the idea that you need to protect children from the complexities of the computer (and protect the computer from the children). Picaros Diego is different. There’s nothing stripped- down or shielded from view. Instead, it’s a normal Linux distro with a brighter, more kid-friendly interface. The desktop wallpaper perhaps best We were too busy playing Secret Mario on Picaros Diego to write a witty or interesting caption. exemplifies this. On one hand, it’s a colourful cartoon image designed to interest young file manager. In the programming category, little young for a system like this, but the it children. Some of the images on the we were slightly disappointed to discover it may well work for children on the upper end landscape are icons for games, and this only had Gambas (a Visual Basic-like of that age range. should encourage children to investigate the language), and not more popular teaching Overall, we like the philosophy of wrapping system rather than just relying on menus. languages like Scratch or a Python IDE. Linux is a child-friendly package, but not On the other hand, it still displays technical However, it’s based on Debian, so you do dumbing it down. Picaros Diego won’t work details such as the CPU usage and the RAM have the full range of software available for every child, but if you have a budding and Swap availability. -
Read PDF Linux-Distribusjoner: Ubuntu, Fedora
[PDF] Linux-distribusjoner: Ubuntu, Fedora, Slackware, Mandriva Linux, Splashtop, Kubuntu, Debian, Mark Shuttleworth, Linux Mint, Gobuntu Linux-distribusjoner: Ubuntu, Fedora, Slackware, Mandriva Linux, Splashtop, Kubuntu, Debian, Mark Shuttleworth, Linux Mint, Gobuntu Book Review Absolutely one of the best pdf We have ever read. I really could comprehended every little thing using this written e book. I am easily could get a satisfaction of reading a written publication. (Dr. Od ie Ham ill) LINUX-DISTRIBUSJONER: UBUNTU, FEDORA , SLA CKWA RE, MA NDRIVA LINUX, SPLA SHTOP, KUBUNTU, DEBIA N, MA RK SHUTTLEW ORTH, LINUX MINT, GOBUNTU - To read Linux - distribusjoner: Ubuntu, Fedora, Slackware, Mandriva Linux , Splashtop, Kubuntu, Debian, Mark Shuttleworth, Linux Mint, Gobuntu PDF, you should follow the hyperlink beneath and save the ebook or gain access to other information which are highly relevant to Linux-distribusjoner: Ubuntu, Fedora, Slackware, Mandriva Linux, Splashtop, Kubuntu, Debian, Mark Shuttleworth, Linux Mint, Gobuntu book. » Download Linux -distribusjoner: Ubuntu, Fedora, Slackware, Mandriva Linux , Splashtop, Kubuntu, Debian, Mark Shuttleworth, Linux Mint, Gobuntu PDF « Our solutions was launched using a want to serve as a total on the internet electronic digital catalogue which offers usage of multitude of PDF document collection. You may find many different types of e-book along with other literatures from the paperwork database. Particular popular issues that distributed on our catalog are famous books, answer key, exam test questions and answer, guide example, practice guideline, quiz trial, customer manual, user guide, service instruction, maintenance manual, and so forth. All e-book all privileges remain together with the writers, and downloads come as is. -
The Linux Kernel Module Programming Guide
The Linux Kernel Module Programming Guide Peter Jay Salzman Michael Burian Ori Pomerantz Copyright © 2001 Peter Jay Salzman 2007−05−18 ver 2.6.4 The Linux Kernel Module Programming Guide is a free book; you may reproduce and/or modify it under the terms of the Open Software License, version 1.1. You can obtain a copy of this license at http://opensource.org/licenses/osl.php. This book is distributed in the hope it will be useful, but without any warranty, without even the implied warranty of merchantability or fitness for a particular purpose. The author encourages wide distribution of this book for personal or commercial use, provided the above copyright notice remains intact and the method adheres to the provisions of the Open Software License. In summary, you may copy and distribute this book free of charge or for a profit. No explicit permission is required from the author for reproduction of this book in any medium, physical or electronic. Derivative works and translations of this document must be placed under the Open Software License, and the original copyright notice must remain intact. If you have contributed new material to this book, you must make the material and source code available for your revisions. Please make revisions and updates available directly to the document maintainer, Peter Jay Salzman <[email protected]>. This will allow for the merging of updates and provide consistent revisions to the Linux community. If you publish or distribute this book commercially, donations, royalties, and/or printed copies are greatly appreciated by the author and the Linux Documentation Project (LDP). -
CS 106X, Lecture 21 Tries; Graphs
CS 106X, Lecture 21 Tries; Graphs reading: Programming Abstractions in C++, Chapter 18 This document is copyright (C) Stanford Computer Science and Nick Troccoli, licensed under Creative Commons Attribution 2.5 License. All rights reserved. Based on slides created by Keith Schwarz, Julie Zelenski, Jerry Cain, Eric Roberts, Mehran Sahami, Stuart Reges, Cynthia Lee, Marty Stepp, Ashley Taylor and others. Plan For Today • Tries • Announcements • Graphs • Implementing a Graph • Representing Data with Graphs 2 Plan For Today • Tries • Announcements • Graphs • Implementing a Graph • Representing Data with Graphs 3 The Lexicon • Lexicons are good for storing words – contains – containsPrefix – add 4 The Lexicon root the art we all arts you artsy 5 The Lexicon root the contains? art we containsPrefix? add? all arts you artsy 6 The Lexicon S T A R T L I N G S T A R T 7 The Lexicon • We want to model a set of words as a tree of some kind • The tree should be sorted in some way for efficient lookup • The tree should take advantage of words containing each other to save space and time 8 Tries trie ("try"): A tree structure optimized for "prefix" searches struct TrieNode { bool isWord; TrieNode* children[26]; // depends on the alphabet }; 9 Tries isWord: false a b c d e … “” isWord: true a b c d e … “a” isWord: false a b c d e … “ac” isWord: true a b c d e … “ace” 10 Reading Words Yellow = word in the trie A E H S / A E H S A E H S A E H S / / / / / / / / A E H S A E H S A E H S A E H S / / / / / / / / / / / / A E H S A E H S A E H S / / / / / / / -
Procedures to Build Crypto Libraries in Minix
Created by Jinkai Gao (Syracuse University) Seed Document How to talk to inet server Note: this docment is fully tested only on Minix3.1.2a. In this document, we introduce a method to let user level program to talk to inet server. I. Problem with system call Recall the process of system call, refering to http://www.cis.syr.edu/~wedu/seed/Labs/Documentation/Minix3/System_call_sequence.pd f We can see the real system call happens in this function call: _syscall(FS, CHMOD, &m) This function executes ‘INT 80’ to trap into kernel. Look at the parameter it passs to kernel. ‘CHMOD’ is a macro which is merely the system call number. ‘FS’ is a macro which indicates the server which handles the chmod system call, in this case ‘FS’ is 1, which is the pid of file system server process. Now your might ask ‘why can we hard code the pid of the process? Won’t it change?’ Yes, normally the pid of process is unpredictable each time the system boots up. But for fs, pm, rs, init and other processes which is loaded from system image at the very beginning of booting time, it is not true. In minix, you can dump the content of system image by pressing ‘F3’, then dump the current running process table by pressing ‘F1’. What do you find? The first 12 entries in current process table is exactly the ones in system image with the same order. So the pids of these 12 processes will not change. Inet is different. It is not in the system image, so it is not loaded into memory in the very first time. -
Practical C Programming, 3Rd Edition
Practical C Programming, 3rd Edition By Steve Oualline 3rd Edition August 1997 ISBN: 1-56592-306-5 This new edition of "Practical C Programming" teaches users not only the mechanics or programming, but also how to create programs that are easy to read, maintain, and debug. It features more extensive examples and an introduction to graphical development environments. Programs conform to ANSI C. 0 TEAM FLY PRESENTS Table of Contents Preface How This Book is Organized Chapter by Chapter Notes on the Third Edition Font Conventions Obtaining Source Code Comments and Questions Acknowledgments Acknowledgments to the Third Edition I. Basics 1. What Is C? How Programming Works Brief History of C How C Works How to Learn C 2. Basics of Program Writing Programs from Conception to Execution Creating a Real Program Creating a Program Using a Command-Line Compiler Creating a Program Using an Integrated Development Environment Getting Help on UNIX Getting Help in an Integrated Development Environment IDE Cookbooks Programming Exercises 3. Style Common Coding Practices Coding Religion Indentation and Code Format Clarity Simplicity Summary 4. Basic Declarations and Expressions Elements of a Program Basic Program Structure Simple Expressions Variables and Storage 1 TEAM FLY PRESENTS Variable Declarations Integers Assignment Statements printf Function Floating Point Floating Point Versus Integer Divide Characters Answers Programming Exercises 5. Arrays, Qualifiers, and Reading Numbers Arrays Strings Reading Strings Multidimensional Arrays Reading Numbers Initializing Variables Types of Integers Types of Floats Constant Declarations Hexadecimal and Octal Constants Operators for Performing Shortcuts Side Effects ++x or x++ More Side-Effect Problems Answers Programming Exercises 6. -
CSE 220: Systems Programming Input and Output
CSE 220: Systems Programming Input and Output Ethan Blanton Department of Computer Science and Engineering University at Buffalo Introduction Unix I/O Standard I/O Buffering Summary References I/O Kernel Services We have seen some text I/O using the C Standard Library. printf() fgetc() … However, all I/O is built on kernel system calls. In this lecture, we’ll look at those services vs. standard I/O. © 2020 Ethan Blanton / CSE 220: Systems Programming Introduction Unix I/O Standard I/O Buffering Summary References Everything is a File These services are particularly important on Unix systems. On Unix, “everything is a file”. Many devices and services are accessed by opening device nodes. Device nodes behave like (but are not) files. Examples: /dev/null: Always readable, contains no data. Always writable, discards anything written to it. /dev/urandom: Always readable, reads a cryptographically secure stream of random data. © 2020 Ethan Blanton / CSE 220: Systems Programming Introduction Unix I/O Standard I/O Buffering Summary References File Descriptors All access to files is through file descriptors. A file descriptor is a small integer representing an open file in a particular process. There are three “standard” file descriptors: 0: standard input 1: standard output 2: standard error …sound familiar? (stdin, stdout, stderr) © 2020 Ethan Blanton / CSE 220: Systems Programming Introduction Unix I/O Standard I/O Buffering Summary References System Call Failures Kernel I/O (and most other) system calls return -1 on failure. When this happens, the global variable errno is set to a reason. Include errno.h to define errno in your code. -
Redhawk Linux User's Guide
Linux® User’s Guide 0898004-520 May 2007 Copyright 2007 by Concurrent Computer Corporation. All rights reserved. This publication or any part thereof is intended for use with Concurrent products by Concurrent personnel, customers, and end–users. It may not be reproduced in any form without the written permission of the publisher. The information contained in this document is believed to be correct at the time of publication. It is subject to change without notice. Concurrent makes no warranties, expressed or implied, concerning the information contained in this document. To report an error or comment on a specific portion of the manual, photocopy the page in question and mark the correction or comment on the copy. Mail the copy (and any additional comments) to Concurrent Computer Corporation, 2881 Gateway Drive, Pompano Beach, Florida, 33069. Mark the envelope “Attention: Publications Department.” This publication may not be reproduced for any other reason in any form without written permission of the publisher. Concurrent Computer Corporation and its logo are registered trademarks of Concurrent Computer Corporation. All other Concurrent product names are trademarks of Concurrent while all other product names are trademarks or registered trademarks of their respective owners. Linux® is used pursuant to a sublicense from the Linux Mark Institute. Printed in U. S. A. Revision History: Date Level Effective With August 2002 000 RedHawk Linux Release 1.1 September 2002 100 RedHawk Linux Release 1.1 December 2002 200 RedHawk Linux Release 1.2 April 2003 300 RedHawk Linux Release 1.3, 1.4 December 2003 400 RedHawk Linux Release 2.0 March 2004 410 RedHawk Linux Release 2.1 July 2004 420 RedHawk Linux Release 2.2 May 2005 430 RedHawk Linux Release 2.3 March 2006 500 RedHawk Linux Release 4.1 May 2006 510 RedHawk Linux Release 4.1 May 2007 520 RedHawk Linux Release 4.2 Preface Scope of Manual This manual consists of three parts. -
Linux Software User's Manual
New Generation Systems (NGS) Linux Software User’s Manual Version 1.0, September 2019 www.moxa.com/product © 2019 Moxa Inc. All rights reserved. New Generation Systems (NGS) Linux Software User’s Manual The software described in this manual is furnished under a license agreement and may be used only in accordance with the terms of that agreement. Copyright Notice © 2019 Moxa Inc. All rights reserved. Trademarks The MOXA logo is a registered trademark of Moxa Inc. All other trademarks or registered marks in this manual belong to their respective manufacturers. Disclaimer Information in this document is subject to change without notice and does not represent a commitment on the part of Moxa. Moxa provides this document as is, without warranty of any kind, either expressed or implied, including, but not limited to, its particular purpose. Moxa reserves the right to make improvements and/or changes to this manual, or to the products and/or the programs described in this manual, at any time. Information provided in this manual is intended to be accurate and reliable. However, Moxa assumes no responsibility for its use, or for any infringements on the rights of third parties that may result from its use. This product might include unintentional technical or typographical errors. Changes are periodically made to the information herein to correct such errors, and these changes are incorporated into new editions of the publication. Technical Support Contact Information www.moxa.com/support Moxa Americas Moxa China (Shanghai office) Toll-free: 1-888-669-2872 Toll-free: 800-820-5036 Tel: +1-714-528-6777 Tel: +86-21-5258-9955 Fax: +1-714-528-6778 Fax: +86-21-5258-5505 Moxa Europe Moxa Asia-Pacific Tel: +49-89-3 70 03 99-0 Tel: +886-2-8919-1230 Fax: +49-89-3 70 03 99-99 Fax: +886-2-8919-1231 Moxa India Tel: +91-80-4172-9088 Fax: +91-80-4132-1045 Table of Contents 1. -
Debugging Kernel Problems
Debugging Kernel Problems by GregLehey Edition for AsiaBSDCon 2004 Taipei, 13 March 2004 Debugging Kernel Problems by GregLehey([email protected]) Copyright © 1995-2004 GregLehey 3Debugging Kernel Problems Preface Debugging kernel problems is a black art. Not manypeople do it, and documentation is rare, in- accurate and incomplete. This document is no exception: faced with the choice of accuracyand completeness, I chose to attempt the latter.Asusual, time was the limiting factor,and this draft is still in beta status. This is a typical situation for the whole topic of kernel debugging: building debug tools and documentation is expensive,and the people who write them are also the people who use them, so there'satendencytobuild as much of the tool as necessary to do the job at hand. If the tool is well-written, it will be reusable by the next person who looks at a particular area; if not, it might fall into disuse. Consider this book a starting point for your own develop- ment of debugging tools, and remember: more than anywhere else, this is an area with ``some as- sembly required''. Debugging Kernel Problems 4 1 Introduction Operating systems fail. All operating systems contain bugs, and theywill sometimes cause the system to behave incorrectly.The BSD kernels are no exception. Compared to most other oper- ating systems, both free and commercial, the BSD kernels offer a large number of debugging tools. This tutorial examines the options available both to the experienced end user and also to the developer. In this tutorial, we’ll look at the following topics: • Howand whykernels fail. -
Introduction to Unix
Introduction to Unix Rob Funk <[email protected]> University Technology Services Workstation Support http://wks.uts.ohio-state.edu/ University Technology Services Course Objectives • basic background in Unix structure • knowledge of getting started • directory navigation and control • file maintenance and display commands • shells • Unix features • text processing University Technology Services Course Objectives Useful commands • working with files • system resources • printing • vi editor University Technology Services In the Introduction to UNIX document 3 • shell programming • Unix command summary tables • short Unix bibliography (also see web site) We will not, however, be covering these topics in the lecture. Numbers on slides indicate page number in book. University Technology Services History of Unix 7–8 1960s multics project (MIT, GE, AT&T) 1970s AT&T Bell Labs 1970s/80s UC Berkeley 1980s DOS imitated many Unix ideas Commercial Unix fragmentation GNU Project 1990s Linux now Unix is widespread and available from many sources, both free and commercial University Technology Services Unix Systems 7–8 SunOS/Solaris Sun Microsystems Digital Unix (Tru64) Digital/Compaq HP-UX Hewlett Packard Irix SGI UNICOS Cray NetBSD, FreeBSD UC Berkeley / the Net Linux Linus Torvalds / the Net University Technology Services Unix Philosophy • Multiuser / Multitasking • Toolbox approach • Flexibility / Freedom • Conciseness • Everything is a file • File system has places, processes have life • Designed by programmers for programmers University Technology Services