[Lldb-commits] [PATCH] D130054: [trace][intel pt] Introduce wall clock time for each trace item

[walter erquinigo via Phabricator via lldb-commits]

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- Decouple TSCs from trace items
- Turn TSCs into events just like CPUs
- Add a GetWallTime that returns the wall time that the trace plug-in can infer for each trace item.
- For intel pt, we are doing the following interpolation: if an instruction takes less than 1 TSC, we use that duration, otherwise, we assume the instruction took 1 TSC. This helps us avoid having to handle context switches, changes to kernel, idle times, decoding errors, etc. We are just trying to show some approximation and not the real data. For the real data, TSCs are the way to go.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D130054

Files:
  lldb/include/lldb/Target/TraceCursor.h
  lldb/include/lldb/Target/TraceDumper.h
  lldb/include/lldb/lldb-enumerations.h
  lldb/source/Commands/CommandObjectThread.cpp
  lldb/source/Commands/Options.td
  lldb/source/Plugins/Trace/intel-pt/DecodedThread.cpp
  lldb/source/Plugins/Trace/intel-pt/DecodedThread.h
  lldb/source/Plugins/Trace/intel-pt/TraceCursorIntelPT.cpp
  lldb/source/Plugins/Trace/intel-pt/TraceCursorIntelPT.h
  lldb/source/Plugins/Trace/intel-pt/TraceIntelPT.cpp
  lldb/source/Target/TraceCursor.cpp
  lldb/source/Target/TraceDumper.cpp

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