Chapter 4 - DSpace at Waseda University

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5.12: One of the reasons of HRTimer latency ……………………………………..……..… 71 5.13: Result of analysis of HRTimer latency ………………………………………….…… 72 5.14: Kernel source of softirq modified HRTimer ……………………………………......... 72 5.15: Result of experiment on Linux-RT and general Linux in 100μs …………………..… 73 5.16: Result of an experiment on Linux-RT and general Linux in 1ms …………………..... 74 5.17: Result of an experiment of HRTimer latency in Linux-2.6.24 …………………….. 74 5.18: Result of experiment of HRTimer latency in Linux-2.6.24-changed-softirq ……….... 75 5.19: Result of experiment of HRTimer latency in Linux-2.6.24-rt-patched …………….… 75 6.1: Real-Time Architecture of KAS ……………………………………………………….. 80 6.2: KAS and CABI ………………………………………………………………………... 80 A.1 Classification of real-time scheduling algorithm ……………………………………… 85 A.2 Control the consumptions of the resources by CABI ………………………….………. 88 xii
Chapter 1 Introduction Today, thanks to the rapid development of hardware, not only embedded hardware but also embedded software have developed drastically. In addition, a lot of embedded system’s studies are being performed remarkably especially in ubiquitous systems or cyber physical systems (CPS) [62]. Recently a smartphone [57] or PDA phone, for example, is spreading rapidly. A PDA phone, which is a mobile phone with a PDA’s functions, is equipped with high-performance CPU and general-purpose operating system (OS) to enforce various functions, including multimedia features. A smartphone, which is a mobile phone offering PC-likely advanced capacities, supports not only PDA’s functions but also remote control, Internet, user-friendly interface - a touch screen and a handwriting input. Moreover, since it supports wireless internet, various functions such as E-mail, web browsing, fax, banking services and games became available. Some of them has already started to standardize its
Page 1: Analyzing Real-Time Performance Pro
Page 4 and 5: to propose a solution for the probl
Page 6 and 7: 2.5 Event Log …………………
Page 8 and 9: 6. Conclusions and Future Work 6.1
Page 10 and 11: List of Figures 2.1 User-space vs.
Page 14 and 15: Chapter 1 functions or equipped wit
Page 16 and 17: Chapter 1 huge losses in cost. For
Page 18 and 19: Chapter 1 1.3 Contribution When dev
Page 20 and 21: Chapter 2 Background 2.1 Embedded S
Page 22 and 23: Chapter 2 memory and to manage syst
Page 24 and 25: Chapter 2 2.3 Embedded Linux An emb
Page 26 and 27: Chapter 2 � How often CPU accesse
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Page 30 and 31: Chapter 2 � To count time accurat
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Page 34 and 35: Chapter 3 hardware such as SoC (Sys
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Page 42 and 43: Chapter 3 In Figure 3.4, through Me
Page 44 and 45: Chapter 3 Figure 3.6: Event logging
Page 46 and 47: Chapter 4 execution times, and whol
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Page 50 and 51: Chapter 4 Advantage of analysis by
Page 52 and 53: Chapter 4 ways of debugging accordi
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Page 56 and 57: Chapter 4 4.2.2 Separation Layer Fi
Page 58 and 59: Chapter 4 4.2.3 Analysis Layer Figu
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Chapter 4 Table 4.1: Important para
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Chapter 4 possible to event logging
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Chapter 4 KAS’s dependency with L
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Chapter 5 5.1 Timer Latency When a
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Chapter 5 mode [31]. In opposite, p
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Chapter 5 Figure 5.4 shows the inte
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Chapter 5 latency. Figure 5.5 shows
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Chapter 5 Figure 5.6 Interface of s
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Chapter 5 Table 5.1: Result of Dete
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Chapter 5 Table 5.2: Result of Anal
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Chapter 5 most of time. Especially,
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Chapter 5 Figure 5.13: Result of an
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Chapter 5 Figure 5.16: Result of ex
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Chapter 5 5.6 Summary We analyzed l
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Chapter 6 In embedded systems, ther
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Chapter 6 Figure 6.1: Real-Time Arc
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Appendix A.1 RTOS Commonly, a goal
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Appendix software, real-time OS mus
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Appendix critical task and non-crit
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Appendix � Portability CABI shoul
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Bibliography [1] L. Abeni, A. Goel,
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Bibliography [21] C. Yuan, N. Lao,
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Bibliography [38] Magdalena Balazin
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Bibliography [56] Balakrishnan, S.;
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Acknowledgements I would firstly li
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