perf/Documentation/itrace.txt

8 		p	synthesize power events (incl. PSB events for Intel PT)
10 			of aux-output (refer to perf record)
27 		Z	prefer to ignore timestamps (so-called "timeless" decoding)
29 	The default is all events i.e. the same as --itrace=iybxwpe,
30 	except for perf script where it is --itrace=ce
49 	large PEBS. Refer linkperf:perf-intel-pt[1] man page for details.
52 	ptwrite, power) at the beginning. This is useful to ignore initialization code.
54 	--itrace=i0nss1000000
59 	will not be reported. Each flag must be preceded by either '+' or '-'.
66 	by either '+' or '-'. The flags are:
68 		e	output only on errors (size configurable - see linkperf:perf-config[1])
69 		o	output to stdout