A.6. perf

This command provides overall statistics for common performance events, including instructions executed and clock cycles consumed. You can use the option flags to gather statistics on events other than the default measurement events. As of Red Hat Enterprise Linux 6.4, it is possible to use perf stat to filter monitoring based on one or more specified control groups (cgroups).

For further information, read the man page:

$ man perf-stat

This command records performance data into a file which can be later analyzed using perf report. For further details, read the man page:

$ man perf-record

This command reads the performance data from a file and analyzes the recorded data. For further details, read the man page:

$ man perf-report

This command lists the events available on a particular machine. These events vary based on the performance monitoring hardware and the software configuration of the system. For further information, read the man page:

$ man perf-list

This command performs a similar function to the top tool. It generates and displays a performance counter profile in realtime. For further information, read the man page:

$ man perf-top

This command performs a similar function to the strace tool. It monitors the system calls used by a specified thread or process and all signals received by that application. Additional trace targets are available; refer to the man page for a full list:

$ man perf-trace