diff options
Diffstat (limited to 'tools/perf/Documentation/itrace.txt')
| -rw-r--r-- | tools/perf/Documentation/itrace.txt | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/tools/perf/Documentation/itrace.txt b/tools/perf/Documentation/itrace.txt index 82ff7dad40c2..271484754fee 100644 --- a/tools/perf/Documentation/itrace.txt +++ b/tools/perf/Documentation/itrace.txt @@ -10,7 +10,9 @@ e synthesize error events d create a debug log g synthesize a call chain (use with i or x) + G synthesize a call chain on existing event records l synthesize last branch entries (use with i or x) + L synthesize last branch entries on existing event records s skip initial number of events The default is all events i.e. the same as --itrace=ibxwpe, @@ -31,6 +33,10 @@ Also the number of last branch entries (default 64, max. 1024) for instructions or transactions events can be specified. + Similar to options g and l, size may also be specified for options G and L. + On x86, note that G and L work poorly when data has been recorded with + large PEBS. Refer linkperf:perf-intel-pt[1] man page for details. + It is also possible to skip events generated (instructions, branches, transactions, ptwrite, power) at the beginning. This is useful to ignore initialization code. |