Chapter 4 - DSpace at Waseda University

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List of Figures 2.1 User-space vs. kernel-space ………………………………..…………………………... 11 2.2 Process of general event logging ………………………………………………….......... 16 2.3 The execution of local timer soft interruption handler ……………………….……... 19 3.1 flow chart of the event log …………………………………………………………....... 24 3.2 For example free command …………………………………………………….……..... 26 3.3 Process viewer for Linux ……………………………….………...……………..……... 28 3.4 Mevalet viewer’s execution ……………………………………………………………. 29 3.5 LTTV viewer’s execution ………………………………………………………….…… 31 3.6 Event logging sequence of LTTng ………………………………………………….….. 32 4.1 Normal method of event logging and analysis …………………………………………. 36 4.2 Kernel Analysis System Architecture …………………………………………….…….. 37 4.3 Event log process flow of KAS ……………………………………………………….… 37 4.4 Problem definition ……………...…………………………………………………….… 44 4.5 Process flow of detection layer ………………………………………………….……... 44 x
4.6 Event log separated in SL …………………………………………………………….… 45 4.7 Process flow of Separation Layer ……………………………………………………… 46 4.8 Process flow of analysis layer ……………………………………………………….…. 47 4.9 Dependency of each module is KAS …………………………………………………... 47 4.10 Pseudo code of KAS …………………………………………………………….……. 48 4.11 parameter and event log …………………………………………………………...….. 50 4.12 Relation between trace point and event log ………………………………………..… 51 4.13 An example showing the usage of trace point in LTTng and KAS …………………... 52 4.14 Basic trace point offered by LTTng ………………………………………………….. 53 4.15 Procedure of problem analysis process of LTTng and KAS ………………….……… 53 5.1 Task Preemption Latency Model ……………………………………………………..... 56 5.2 Priority Task Latency Model ……………………………………………………….….. 57 5.3 Process of interrupt of preemptive kernel ………………………………………….….. 58 5.4 3 Process of interrupt of non-preemptive kernel ………………………………….…… 59 5.5 Hrtimer latency model …………………………………………………………….…… 62 5.6 Source code of setitimer ………………………………………………………….…….. 64 5.7 set up setitimer …………………………….……………………………………….. 64 5.8 Periodic process of HRTimer is set by 100μs ………….…………………….... 64 5.9: Source code of DL for line information …………………………………….….… 66 5.10: Result of Separation Layer …………………..…………………………….………… 67 5.11: Event log of part where delay occurred …………………………………………….. 70 xi
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 12 and 13: 5.12: One of the reasons of HRTimer
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
Page 28 and 29: Chapter 2 2.6 Problem Analysis Figu
Page 30 and 31: Chapter 2 � To count time accurat
Page 32 and 33: Chapter 2 board. Its clock signal i
Page 34 and 35: Chapter 3 hardware such as SoC (Sys
Page 36 and 37: Chapter 3 shows how useful the logg
Page 38 and 39: Chapter 3 free to check memory. How
Page 40 and 41: Chapter 3 Figure 3.3: Process viewe
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
Page 48 and 49: Chapter 4 due to its large amount.
Page 50 and 51: Chapter 4 Advantage of analysis by
Page 52 and 53: Chapter 4 ways of debugging accordi
Page 54 and 55: Chapter 4 problem has occurred it f
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 and a developer analyzes
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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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