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