perf-annotate - Read perf.data (created by perf record) and display annotated code
perf annotate [-i <file> | --input=file] [symbol_name]
This command reads the input file and displays an annotated version of the code. If the object file has debug symbols then the source code will be displayed alongside assembly code.
If there is no debug info in the object, then annotated assembly is displayed.
i synthesize instructions events b synthesize branches events (branch misses for Arm SPE) c synthesize branches events (calls only) r synthesize branches events (returns only) x synthesize transactions events w synthesize ptwrite events p synthesize power events (incl. PSB events for Intel PT) o synthesize other events recorded due to the use
of aux-output (refer to perf record) I synthesize interrupt or similar (asynchronous) events
(e.g. Intel PT Event Trace) e synthesize error events d create a debug log f synthesize first level cache events m synthesize last level cache events M synthesize memory events t synthesize TLB events a synthesize remote access events 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 q quicker (less detailed) decoding A approximate IPC Z prefer to ignore timestamps (so-called "timeless" decoding)
The default is all events i.e. the same as --itrace=ibxwpe, except for perf script where it is --itrace=ce
In addition, the period (default 100000, except for perf script where it is 1) for instructions events can be specified in units of:
i instructions t ticks ms milliseconds us microseconds ns nanoseconds (default)
Also the call chain size (default 16, max. 1024) for instructions or transactions events can be specified.
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 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.
skips the first million instructions.
The 'e' option may be followed by flags which affect what errors will or will not be reported. Each flag must be preceded by either '+' or '-'. The flags are:
l trace data lost
If supported, the 'd' option may be followed by flags which affect what debug messages will or will not be logged. Each flag must be preceded by either '+' or '-'. The flags are:
a all perf events
o output to stdout
If supported, the 'q' option may be repeated to increase the effect.
To disable decoding entirely, use --no-itrace.
The local/global keywords set if the percentage is computed in the scope of the function (local) or the whole data (global). The period/hits keywords set the base the percentage is computed on - the samples period or the number of samples (hits).