tools/perf/Documentation/itrace.txt

   1                 i       synthesize instructions events
   2                 b       synthesize branches events
   3                 c       synthesize branches events (calls only)
   4                 r       synthesize branches events (returns only)
   5                 x       synthesize transactions events
   6                 w       synthesize ptwrite events
   7                 p       synthesize power events
   8                 e       synthesize error events
   9                 d       create a debug log
  10                 g       synthesize a call chain (use with i or x)
  11                 l       synthesize last branch entries (use with i or x)
  12                 s       skip initial number of events
  13
  14         The default is all events i.e. the same as --itrace=ibxwpe
  15
  16         In addition, the period (default 100000) for instructions events
  17         can be specified in units of:
  18
  19                 i       instructions
  20                 t       ticks
  21                 ms      milliseconds
  22                 us      microseconds
  23                 ns      nanoseconds (default)
  24
  25         Also the call chain size (default 16, max. 1024) for instructions or
  26         transactions events can be specified.
  27
  28         Also the number of last branch entries (default 64, max. 1024) for
  29         instructions or transactions events can be specified.
  30
  31         It is also possible to skip events generated (instructions, branches, transactions,
  32         ptwrite, power) at the beginning. This is useful to ignore initialization code.
  33
  34         --itrace=i0nss1000000
  35
  36         skips the first million instructions.