9 2 9 isolation system testing and design properties 922

... Executive • Polymorphism 62 UNIX • Hardware is surrounded by the operating system software • Operating system is called the system kernel • Comes with a number of user services and interfaces – Shell ... Efficiency – Allows computer system resources to be used in an efficient manner • Ability to evolve – Permit effective development, testing, and introduction of new system functions without interfering ... of Computer System Services Provided by the Operating System • Program development – Editors and debuggers • Program execution • Access to I/O devices • Controlled access to files • System access

Ngày tải lên: 09/01/2018, 12:01

... 0 123 ÿ5678? ?23 ÿ 29 89 2 96 ÿ 8 ÿ 69 01 023 4ÿ 67681 090 ÿ67 ÿ 3 09 7 ÿ   0 123 ÿ5678? ?23 ÿ 29 89 2 96 0ÿ 38"8ÿ8ÿ8 504 8? ?9 2 0 0ÿ 0ÿ"!ÿ 38"8ÿ7ÿ0ÿ $9 09" 05ÿ ÿ%ÿ345ÿ5070308ÿ7ÿ0? ?9 2 0 ... 38"8ÿ7ÿ0ÿ $9 09" 05ÿ ÿ%ÿ345ÿ5070308ÿ7ÿ0? ?9 2 0 05ÿ345ÿA05ÿ74ÿ3? ?2  09 ÿ7450ÿ4ÿ 0ÿ3!ÿ 504 8ÿ7ÿ0ÿ074505ÿÿ 07? ?2 088ÿÿ35ÿ 328 ÿ ÿ745 793

Ngày tải lên: 15/05/2017, 17:39

... Commutator Service  A commutator in good condition may be sanded with fine sandpaper  A badly worn commutator may be turned on a lathe and the insulating mica between the segments undercut using ... educational use only Starter Current Draw Test  Measures the current used by the starting system  Connect a voltmeter and ammeter  Disable the engine  disconnect the coil primary supply  ground the ... well as gear and bushing condition © Goodheart-Willcox Co., Inc Permission granted to reproduce for educational use only Starter Reassembly  Lubricate bushings, pinion splines, and other parts

Ngày tải lên: 23/06/2017, 18:55

... Computer System Overview Chapter 1 Operating System • Exploits the hardware resources of one or more processors • Provides a set of services to system users • Manages secondary memory and I/O ... containing the needed information is moved to the cache and delivered to the processor 43 Cache/Main Memory System Cache Read Operation 45 Cache Design • Cache size – Small caches have a significant ... is complete 49 Interrupt-Driven I/O • Processor is interrupted when I/O module ready to exchange data • Processor saves context of program executing and begins executing interrupt-handler • No

Ngày tải lên: 09/01/2018, 12:01

... Processes – Operating system software within context of a user process – Process executes in privileged mode when executing operating system code 52 53 54 Execution of the Operating System • Process-Based ... Operating System – Implement operating system as a collection of system processes – Useful in multi-processor or multicomputer environment 55 UNIX SVR4 Process Management • Most of the operating system ... can be assigned to and executed on a processor • A unit of activity characterized by the execution of a sequence of instructions, a current state, and an associated set of system instructions

Ngày tải lên: 09/01/2018, 12:01

... have built-in synchronization capabilities 39 40 Windows Process Object 41 Windows Thread Object 42 Windows 20 00 Thread States • • • • • • Ready Standby Running Waiting Transition Terminated ... Microkernel Design • Interprocess communication • I/O and interrupt management 38 Windows Processes • Implemented as objects • An executable process may contain one or more threads • Both processes and ... Solaris, Linux, Mach, and OS /2 support multiple threads Process • Have a virtual address space which holds the process image • Protected access to processors, other processes, files, and I/O resources

Ngày tải lên: 09/01/2018, 12:01

... chin; putchar(chout); Process P2 chin = getchar(); chout = chin; putchar(chout); Operating System Concerns • Keep track of various processes • Allocate and deallocate resources – – – – ... mailboxes – One process sends a message to the mailbox and the other process picks up the message from the mailbox 49 50 Message Format 51 52 53 Readers/Writers Problem • Any number of readers ... Concurrency: Mutual Exclusion and Synchronization Chapter Concurrency • Multiple applications • Structured applications • Operating system structure Concurrency Difficulties of

Ngày tải lên: 09/01/2018, 12:01

... receive is blocking P1 P2 Receive(P2); Receive(P1); Send(P2, M1); Send(P1, M2); 10 Dining Philosophers Problem 37 Dining Philosophers Problem 38 Dining Philosophers Problem 39 Dining Philosophers ... databases, and semaphores • Deadlock occurs if each process holds one resource and requests the other Example of Deadlock Another Example of Deadlock • Space is available for allocation of 20 0Kbytes, and ... at a time and not depleted by that use • Processes obtain resources that they later release for reuse by other processes • Processors, I/O channels, main and secondary memory, devices, and data

Ngày tải lên: 09/01/2018, 12:01

... the operating system 27 Paging • Partition memory into small equal fixed-size chunks and divide each process into the same size chunks • The chunks of a process are called pages and chunks of ... program, no matter how small, occupies an entire partition This is called internal fragmentation 10 21 22 Relocation • When program loaded into memory the actual (absolute) memory locations are determined ... Operating system maintains a page table for each process – Contains the frame location for each page in the process – Memory address consist of a page number and offset within the page 28 Assignment

Ngày tải lên: 09/01/2018, 12:01

... Memory • Hardware must support paging and segmentation • Operating system must be able to management the movement of pages and/ or segments between secondary memory and main memory Paging • Each process ... remaining execution window 62 UNIX and Solaris Memory Management • Paging System – Page table – Disk block descriptor – Page frame data table – Swap-use table 63 64 65 66 UNIX and Solaris Memory Management ... Lazy buddy system 68 Linux Memory Management • Page directory • Page middle directory • Page table 69 70 71 Windows Memory Management • Paging – Available – Reserved – Committed 72

Ngày tải lên: 09/01/2018, 12:01

... Operating system calls Signals Short-Tem Scheduling Criteria • User-oriented – Response Time • Elapsed time between the submission of a request until there is output • System- oriented – Effective and ... such as response time and throughput 10 Feedback • Penalize jobs that have been running longer • Don’t know remaining time process needs to execute 30 31 32 33 34 35 36 37 38 39 Fair-Share Scheduling ... are recomputed once per second • Base priority divides all processes into fixed bands of priority levels 42 Bands • Decreasing order of priority – – – – – Swapper Block I/O device control File

Ngày tải lên: 09/01/2018, 12:01

... 421 , 422 – 423 encoding styles, 421 – 424 , 423 f impacts, 4 19, 428 –4 29 header elements, 3 02 303 interoperability issues, 23 2 23 5, 29 7 multistep process protocol, 22 8, 22 8f and NET case example, 29 6 – 29 7 ... protocols, 6–7, 21 8, 22 1 22 2 case example, 22 2 22 4 and TestMaker test agent script, 22 4 22 6 limitations, 22 7 XML Schema, 335 XML Signature, 335 XP programming see Agile programming Y Yahoo, and flapjacks ... 23 2 23 4 discovery, 23 2 floating-point and decimal data types, 23 5 23 6 request/response, 23 4 23 5 scalability techniques, 2 29 23 1 and WSDL (Web Service Description Language), 21 8, 22 8 2 29 Web Services...

Ngày tải lên: 24/10/2013, 18:15

... 92 6 .2. Structure of Modules 94 6 .2. 1.Cohesion .94 6 .2. 2.Coupling .98 6.3.Coding 98 6.4.Data Dictionary 99 6.5.Functional ... steps of system designing using Object Modeling may be listed as: System Analysis System Design Object Design Implementation 2. 6 .2. 1 System Analysis As in any other system development model, system ... = productivity / LOC = 3000/ 1 090 0 = 3.64 Cost of software = Development Cost * person-month = 8000 * 3.64 = $ 29 1 20 Cost / LOC = 29 1 20 /1 090 0 = 2. 67 $/LOC 3 .2. 2 FP Estimation Function oriented...

Ngày tải lên: 27/10/2013, 23:15

... Applications 20 Test Paradigms and Lifecycle Processes Testing Methods 10 15 19 22 25 Click-Stream Testing 26 Unit Testing 27 Functional System Testing 28 Scalability and Performance Testing Quality ... SOAP 22 7 Web Service Scalability Techniques 2 29 Web Service Interoperability Problems 23 1 Discovery 23 2 Definition 23 2 Request/Response 23 4 On the Horizon 23 7 Using TestMaker to Understand WSDL 23 7 ... Validating Response Data 25 4 Making It Easier to Write Agents Resources 25 5 Summary 25 6 25 5 CHAPTER State, Design, and Testing 25 7 A Question of State 25 7 Lifecycle for Testing Stateful Systems Techniques...

Ngày tải lên: 21/01/2014, 23:20

... server and an intelligent test agent 127 .0.0.1 - - [22 /Jan /20 02: 00: 12: 41 listinfo/oukids HTTP/1.1" 20 0 5358 127 .0.0.1 - - [22 /Jan /20 02: 00: 12: 41 man.jpg HTTP/1.1" 20 0 20 22 127 .0.0.1 - - [22 /Jan /20 02: 00: 12: 41 ... - [22 /Jan /20 02: 00: 12: 41 head-tiny.jpg HTTP/1.1" 20 0 30 49 127 .0.0.1 - - [22 /Jan /20 02: 00: 12: 41 PythonPowered.png HTTP/1.1" 20 0 94 5 127 .0.0.1 - - [22 /Jan /20 02: 00:14 :27 20 0 14 89 -0600] "GET /mailman/ ... watermark 61 PH0 69- Cohen.book Page 62 Monday, March 15, 20 04 9: 00 AM 62 Chapter When Application Performance Becomes a Problem Madeline, Add quantity, OK, com.p2t2.quanchk, 10 :21 :23 :15 Steps taken:...

Ngày tải lên: 21/01/2014, 23:20

... 3/14/ 02 FS Structural overview analysis 3/ 19/ 02 FS Initial prototyping 3/11/ 02 UI Design patterns 3/14/ 02 FS FS Unit deliveries for units 10-11- 12 FS 3 /28 / 02 System script language porting 3/ 19/ 02 ... Weighting

Ngày tải lên: 26/01/2014, 18:20

... 137 PH0 69- Cohen.book Page 138 Monday, March 15, 20 04 9: 00 AM Please purchase PDF Split-Merge on www.verypdf.com to remove this watermark PH0 69- Cohen.book Page 1 39 Monday, March 15, 20 04 9: 00 AM ... HTTP cookie handling jCookie http://jcookie sourceforge.net/ Handles IETF None that I can RFC 29 6 5 and think of Netscape style cookies Nice, light, robust, and well documented XML data handling JDOM ... watermark 151 PH0 69- Cohen.book Page 1 52 Monday, March 15, 20 04 9: 00 AM 1 52 Chapter Bridging from Methodology to Design Figure 5–4 The Execution panel is below the Explorer panel and controls running...

Ngày tải lên: 26/01/2014, 18:20

... watermark 191 PH0 69- Cohen.book Page 1 92 Monday, March 15, 20 04 9: 00 AM 1 92 Chapter Design and Test in HTTP/HTML Environments The while causes the Wanderer to loop forever over a group of commands, ... Split-Merge on www.verypdf.com to remove this watermark 22 1 PH0 69- Cohen.book Page 22 2 Monday, March 15, 20 04 9: 00 AM 22 2 Chapter Tuning SOAP and XML Web Services XML-RPC Server Business Logic HTTP/XML ... watermark 21 1 PH0 69- Cohen.book Page 21 2 Monday, March 15, 20 04 9: 00 AM 21 2 Chapter Design and Test in HTTP/HTML Environments through the loop, the script finds the width attribute in the tag and determines...

Ngày tải lên: 26/01/2014, 18:20

... watermark 2 59 PH0 69- Cohen.book Page 26 0 Monday, March 15, 20 04 9: 00 AM 26 0 Chapter 0.00 State, Design, and Testing Sign-in 0.00 Delete 7.50 Check 9. 55 Test Read Delete 6.50 Check 7.50 Test Read 5 .20 2. 25 ... www.verypdf.com to remove this watermark 2 69 PH0 69- Cohen.book Page 27 0 Monday, March 15, 20 04 9: 00 AM 27 0 Chapter State, Design, and Testing write_a_command( f1, pop ) write_a_command( f1, new_node ) print ... commands: Please purchase PDF Split-Merge on www.verypdf.com to remove this watermark 27 1 PH0 69- Cohen.book Page 27 2 Monday, March 15, 20 04 9: 00 AM 27 2 Chapter • • • • State, Design, and Testing...

Ngày tải lên: 26/01/2014, 18:20

... watermark 29 1 PH0 69- Cohen.book Page 29 2 Monday, March 15, 20 04 9: 00 AM Please purchase PDF Split-Merge on www.verypdf.com to remove this watermark PH0 69- Cohen.book Page 29 3 Monday, March 15, 20 04 9: 00 ... Split-Merge on www.verypdf.com to remove this watermark 2 89 PH0 69- Cohen.book Page 29 0 Monday, March 15, 20 04 9: 00 AM 29 0 Chapter State, Design, and Testing The getSubject() function returns a string ... PH0 69- Cohen.book Page 28 0 Monday, March 15, 20 04 9: 00 AM 28 0 Chapter State, Design, and Testing "top-message",commands[1],commands [2] ) push( indent ) next_message += indent += The handled...

Ngày tải lên: 26/01/2014, 18:20