performance analysis tool: Perf

Sampling with perf record

The perf tool can be used to collect profiles on per-thread, per-process and per-cpu basis.
There are several commands associated with sampling: record, report, annotate. You must first collect the samples using perf record. This generates an output file called perf.data. That file can then be analyzed, possibly on another machine, using the perf report and perf annotate commands. The model is fairly similar to that of OProfile.