REAL-TIME SYSTEMS DESIGN AND ANALYSIS phần 7 potx

... against object-oriented programming languages for real-time systems, however, are that they can lead to unpredictable and inefficient systems and that they are hard to optimize. The unpredictability ... object-oriented and procedural languages, and can be used either way, depending on the skill and preferences of the pro- grammer. Applicative languages such as LISP and Prolog...

Ngày tải lên: 13/08/2014, 08:20

... Optimization / 377 7. 5.1 Compute at Slowest Cycle / 377 7. 5.2 Scaled Numbers / 377 7. 5.3 Binary Angular Measure / 378 7. 5.4 Look-Up Tables / 379 7. 5.5 Imprecise Computation / 380 7. 5.6 Optimizing ... Theory / 373 7. 3.6 Little’s Law / 373 7. 3 .7 Erlang’s Formula / 374 7. 4 I/O Performance / 375 7. 4.1 Basic Buffer-Size Calculation / 375 7. 4.2 Variable Buffer-Size Calculati...

Ngày tải lên: 13/08/2014, 08:20

... generally, 73 74 hybrid systems, 83–86 interrupt-driven systems, 79 –82 memory locking, 132, 155 preemptive-priority systems, 82 pseudokernels, 74 79 selection factors/criteria, 134–1 37 task-control ... Campanai, M., and Nesi, P. “Tools for Specifying Real-Time Systems. ” Real-Time Systems: The International Journal of Time Critical Systems, Volume 8, Number 2/3, March/Apri...

Ngày tải lên: 13/08/2014, 08:20

... increases. 274 UNIX Filesystems—Evolution, Design, and Implementation -rw-r r 1 root other 8 Jun 7 11: 37 goodbye -rw-r r 1 root other 6 Jun 7 11: 37 hello drwxr-xr-x 2 root root 96 Jun 7 11: 37 lost+found # ... namelist = /dev/ksyms, outfile = stdout > p ! grep dopen 336 s 371 9 371 3 371 9 371 3 0 46 dopen load 363 s 371 5 371 3 371 5 371 3 0 46 dopen load Starting with th...

Ngày tải lên: 13/08/2014, 04:21

... applications, including image processing, avionics systems, and medical systems, and the real-time design issues are the same for them as they are for most other systems. 44 2 HARDWARE CONSIDERATIONS FFFFFFFF FFFFFF00 FFFFFE00 FFC00000 DMA Memory-mapped ... microcontroller- based real-time systems abound. A microcontroller is a computer system that is programmable via microins...

Ngày tải lên: 13/08/2014, 08:20

... R6,&reg6 ; save register 6 STORE R7,&reg7 ; save register 7 JU @APP ; execute real-time application program LOAD R7,&reg7 ; restore register 7 LOAD R6,&reg6 ; restore register ... at t 6 and lets τ 3 execute to completion at t 7 .Taskτ 3 is then allowed to lock S 1 , and subsequently S 2 ,and completes at t 8 . 3.1 REAL-TIME KERNELS 87 associated with round-ro...

Ngày tải lên: 13/08/2014, 08:20

... net analysis can be used to identify nonobvious cycles that appear as subgraphs in more complex diagrams. 4.5 STRUCTURED ANALYSIS AND DESIGN Methods for structured analysis and structured design ... account for system dynamics and use if for the specification of real-time systems. These approaches include Gomaa’s DARTS (design approach for real-time systems) [Gomaa00]....

Ngày tải lên: 13/08/2014, 08:20

... outstanding commercial software. Real-time engineers know that their systems are frequently subject to changes in hardware, algorithms, and even application. Therefore these systems must be designed ... made concerning responsibility fulfillment and assignment, system architecture and deployment, separation of concerns, and layering and modularization. Successful design is ac...

Ngày tải lên: 13/08/2014, 08:20

... SYSTEM DESIGN Same messages as between m_VehicleTrafficStandard[0] and m_Approach[0]. Same messages as between m_PedestrianTrafficStandard[0] and m_Approach[0]. Same messages as between m_PedestrianDetector[0] and ... Controller :IntersectionController m_Approach[0] :Approach m_Approach[1] :Approach m_Approach[2] :Approach m_Approach[3] :Approach m_PedestrianDetector[0] :OnOffSensor m...

Ngày tải lên: 13/08/2014, 08:20

... context switching. 7. 2.8 Deterministic Performance Cache, pipelines, and DMA, all designed to improve average real-time perfor- mance, destroy determinism and thus make prediction of real-time performance troublesome. ... flushing). 7. 7 ANALYSIS OF MEMORY REQUIREMENTS With memory becoming denser and cheaper, memory utilization analysis has become less of a concern. Still, its...

Ngày tải lên: 13/08/2014, 08:20