perf-inject - Filter to augment the events stream with additional information
perf inject <options>
perf-inject reads a perf-record event stream and repipes it to stdout. At any point the processing code can inject other events into the event stream - in this case build-ids (-b option) are read and injected as needed into the event stream.
Build-ids are just the first user of perf-inject - potentially anything that needs userspace processing to augment the events stream with additional information could make use of this facility.
i synthesize instructions events b synthesize branches events c synthesize branches events (calls only) r synthesize branches events (returns only) x synthesize transactions events w synthesize ptwrite events p synthesize power events e synthesize error events d create a debug log g synthesize a call chain (use with i or x) l synthesize last branch entries (use with i or x) s skip initial number of events
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.
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.