Scroll to navigation

PERF_4.12-FTRACE(1) perf Manual PERF_4.12-FTRACE(1)

NAME

perf-ftrace - simple wrapper for kernel's ftrace functionality

SYNOPSIS

perf ftrace <command>

DESCRIPTION

The perf ftrace command is a simple wrapper of kernel’s ftrace functionality. It only supports single thread tracing currently and just reads trace_pipe in text and then write it to stdout.

The following options apply to perf ftrace.

OPTIONS

-t, --tracer=

Tracer to use: function_graph or function.

-v, --verbose=

Verbosity level.

-p, --pid=

Trace on existing process id (comma separated list).

-a, --all-cpus

Force system-wide collection. Scripts run without a <command> normally use -a by default, while scripts run with a <command> normally don’t - this option allows the latter to be run in system-wide mode.

-C, --cpu=

Only trace for the list of CPUs provided. Multiple CPUs can be provided as a comma separated list with no space like: 0,1. Ranges of CPUs are specified with -: 0-2. Default is to trace on all online CPUs.

SEE ALSO

perf_4.12-record(1), perf_4.12-trace(1)

2017-09-19 perf