Tracing Merge System 'Integrated Trace' - Linux Foundation Events

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Agenda1. What is “Integrated trace”?2. How to merge trace data- methods- restrictions3. Case study4. SummaryCopyright (c) 2013 Hitachi LTD., Yokohama Research Laboratory. All right reserved2
Agenda1. What is “Integrated trace”?2. How to merge trace data- methods- restrictions3. Case study4. SummaryCopyright (c) 2013 Hitachi LTD., Yokohama Research Laboratory. All right reserved3
Page 1: Tracing Merge System ‘Integrated
Page 5 and 6: Why do we need to merge tracing?•
Page 7 and 8: Our goal imageguest1trace dataof gu
Page 9 and 10: Merge tracing data• Merge tracing
Page 11 and 12: Read TSC value on a guest• TSC va
Page 13 and 14: Getting TSC offset• When a kernel
Page 15: How do we output a TSC offset?1. Ad
Page 18 and 19: TSC offset tracepoint• TSC offset
Page 20 and 21: Merging procedure1. Check if the kv
Page 22 and 23: Basic merging procedure• tsc_offs
Page 24 and 25: Basic merging procedure• tsc_offs
Page 26 and 27: Merging procedure1. Check if the kv
Page 28 and 29: Execute write_tsc on a guest(2)•
Page 30 and 31: When was write_tsc executed?• TSC
Page 32 and 33: General or not (2)• If all timest
Page 34 and 35: Agenda1. What is “Integrated trac
Page 36 and 37: 1. Using cyclictest• We use cycli
Page 38 and 39: 3. Apply the integrated trace• Ho
Page 40 and 41: 5. Check trace data~3.7ms!!TSC=7800
Page 42: Patch Setpatch set of outputting ts

Tracing Merge System 'Integrated Trace' - Linux Foundation Events

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