Provided by: linux-tools-common_4.18.0-10.11_all bug

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.

       -T, --trace-funcs=
           Only trace functions given by the argument. Multiple functions can be given by using
           this option more than once. The function argument also can be a glob pattern. It will
           be passed to set_ftrace_filter in tracefs.

       -N, --notrace-funcs=
           Do not trace functions given by the argument. Like -T option, this can be used more
           than once to specify multiple functions (or glob patterns). It will be passed to
           set_ftrace_notrace in tracefs.

       -G, --graph-funcs=
           Set graph filter on the given function (or a glob pattern). This is useful for the
           function_graph tracer only and enables tracing for functions executed from the given
           function. This can be used more than once to specify multiple functions. It will be
           passed to set_graph_function in tracefs.

       -g, --nograph-funcs=
           Set graph notrace filter on the given function (or a glob pattern). Like -G option,
           this is useful for the function_graph tracer only and disables tracing for function
           executed from the given function. This can be used more than once to specify multiple
           functions. It will be passed to set_graph_notrace in tracefs.

       -D, --graph-depth=
           Set max depth for function graph tracer to follow

SEE ALSO

       perf-record(1), perf-trace(1)