1 i synthesize instructions events 2 b synthesize branches events (branch misses for Arm SPE) 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 (incl. PSB events for Intel PT) 8 o synthesize other events recorded due to the use 9 of aux-output (refer to perf record) 10 e synthesize error events 11 d create a debug log 12 f synthesize first level cache events 13 m synthesize last level cache events 14 M synthesize memory events 15 t synthesize TLB events 16 a synthesize remote access events 17 g synthesize a call chain (use with i or x) 18 G synthesize a call chain on existing event records 19 l synthesize last branch entries (use with i or x) 20 L synthesize last branch entries on existing event records 21 s skip initial number of events 22 q quicker (less detailed) decoding 23 A approximate IPC 24 Z prefer to ignore timestamps (so-called "timeless" decoding) 25 26 The default is all events i.e. the same as --itrace=ibxwpe, 27 except for perf script where it is --itrace=ce 28 29 In addition, the period (default 100000, except for perf script where it is 1) 30 for instructions events can be specified in units of: 31 32 i instructions 33 t ticks 34 ms milliseconds 35 us microseconds 36 ns nanoseconds (default) 37 38 Also the call chain size (default 16, max. 1024) for instructions or 39 transactions events can be specified. 40 41 Also the number of last branch entries (default 64, max. 1024) for 42 instructions or transactions events can be specified. 43 44 Similar to options g and l, size may also be specified for options G and L. 45 On x86, note that G and L work poorly when data has been recorded with 46 large PEBS. Refer linkperf:perf-intel-pt[1] man page for details. 47 48 It is also possible to skip events generated (instructions, branches, transactions, 49 ptwrite, power) at the beginning. This is useful to ignore initialization code. 50 51 --itrace=i0nss1000000 52 53 skips the first million instructions. 54 55 The 'e' option may be followed by flags which affect what errors will or 56 will not be reported. Each flag must be preceded by either '+' or '-'. 57 The flags are: 58 o overflow 59 l trace data lost 60 61 If supported, the 'd' option may be followed by flags which affect what 62 debug messages will or will not be logged. Each flag must be preceded 63 by either '+' or '-'. The flags are: 64 a all perf events 65 o output to stdout 66 67 If supported, the 'q' option may be repeated to increase the effect. 68