INtimeÂ® 3.1 Software - tenAsys

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INtime <strong>3.1</strong> <strong>Software</strong> Considerations for INtime applications running on a multiprocessor PC When Windows and INtime run on a multiprocessor PC, by default the INtime kernel and Windows share one CPU and Windows uses the others. The shared CPU behaves in the same way as the previously mentioned single-CPU case. INtime software may alternatively be configured such that an entire CPU may be dedicated to the INtime kernel. In this case the architecture is rather different, as shown in this figure: Figure 1-2. Control flows in a dedicated multiprocessor configuration Windows processes Real-time processes Windows kernel rtif.sys INtime kernel I/O APIC • ) When a Windows interrupt occurs, the I/O APIC delivers the interrupt to only the Windows CPU. • ) When an RT interrupt occurs, the I/O APIC delivers the interrupt to only the INtime CPU. • ) Windows processes are never preempted by real-time interrupt and processes and vice-versa, because each OS has a dedicated CPU. • ) When all RT threads complete their work, leaving no RT threads ready to run, the INtime CPU executes an idle task until the next real-time interrupt occurs. • ) The Windows and INtime kernels signal using IPIs (Inter Processor Interrupt) and shared When running on a single microprocessor, the INtime runtime environment encapsulates all Windows processes and threads into a single RT thread of lowest priority. As a result, RT threads always preempt running Windows threads, guaranteeing determinism for RT activities within the system. On multiple processors configured so that INtime has a dedicated processor, the RT kernel does not need to encapsulate the Windows system in the same way because there are separate processors for each OS. In both cases, RT and Windows processes can share sections of memory allocated by INtime applications. A Windows thread can obtain a handle for this shared memory, then map the memory referenced by that handle into the thread’s address space. 6
Chapter 1: Overview Developing an INtime application Design considerations Code development Note For detailed information about designing INtime applications, see Chapter 5, Designing RT applications. When designing INtime applications, you must divide the labor appropriately between Windows processes and RT processes and, to a finer degree, between the threads in each process. For the best performance, limit RT processes to performing only timecritical functions, and determine which Windows threads require the greater relative priority. Note For detailed information about developing INtime applications, see Chapter 10, INtime application development. To develop an INtime application, you use Microsoft Visual Studio, including INtime wizards and Microsoft Visual Studio extensions for RT processes, a standard Windows debugger, and a Windows-based RT dynamic debugger that supports on-target debugging of RT threads. INtime includes a debugger which integrates with the Visual Studio debugger. This integration supports the Visual Studio versions from 2003 onward. 7
Page 1 and 2: U S E R ’ S M A N U A L INtime ®
Page 3 and 4: Before you begin This guide describ
Page 5 and 6: Before you begin Glossary Notationa
Page 7 and 8: Before you begin • Within source
Page 9 and 10: Contents Part I Chapter 1 Chapter 2
Page 11 and 12: Contents Part II Chapter 6 Chapter
Page 13 and 14: Contents Part III Appendix A Append
Page 15 and 16: Contents NTX DLLs..................
Page 17 and 18: I Introducing INtime software This
Page 19 and 20: 1 Overview INtime software extends
Page 21: Chapter 1: Overview Considerations
Page 25 and 26: Chapter 1: Overview INtime software
Page 27 and 28: Chapter 1: Overview • INtime Grap
Page 29 and 30: Chapter 1: Overview • Remote conf
Page 31 and 32: 2 Understanding INtime software arc
Page 33 and 34: Chapter 2: Understanding INtime sof
Page 45 and 46: 3 About INtime software’s RT kern
Page 47 and 48: Chapter 3: About INtime software’
Page 55 and 56: 4 About RT programming This chapter
Page 57 and 58: Chapter 4: About RT programming Pre
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Page 63 and 64: Chapter 4: About RT programming Syn
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Page 71 and 72: 5 Designing RT applications This ch
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Chapter 5: Designing RT application
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Chapter 5: Designing RT application
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II Using INtime software This part
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6 Installation This chapter explain
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Chapter 6: Installation 5. Select o
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7 Configuration INtime software pro
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Chapter 7: Configuration Tab Local
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Chapter 7: Configuration Configurin
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Chapter 7: Configuration Setting th
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8 Preparing an RT node This chapter
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Chapter 8: Preparing an RT node Bui
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Chapter 8: Preparing an RT node 4.
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Chapter 8: Preparing an RT node Fir
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9 Operation This chapter describes
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Chapter 9: Operation • INtime too
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10 INtime application development T
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Chapter 10: INtime application deve
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III Appendices The appendices inclu
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A INtime software system calls This
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Appendix A: INtime software system
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B The iwin32 subsystem This appendi
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Appendix B: The iwin32 subsystem A
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Appendix B: The iwin32 subsystem Mu
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Appendix B: The iwin32 subsystem Sh
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Appendix B: The iwin32 subsystem Us
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Appendix B: The iwin32 subsystem Pr
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C INtime directory structure This a
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D INtime software components This a
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Appendix D: INtime software compone
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E Visual Studio .NET debugging for
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Appendix E: Visual Studio .NET debu
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F Adding INtime software to an XP E
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G Troubleshooting This appendix lis
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Appendix G: Troubleshooting Table G
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Appendix G: Troubleshooting Table G
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Glossary application loader asynchr
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Glossary memory area memory pool me
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Index A B C D E F G H I J K L M N O
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A B C D E F G H I J K L M N O P Q R
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