6 perf-ftrace - simple wrapper for kernel's ftrace functionality
12 'perf ftrace' <command>
16 The 'perf ftrace' command is a simple wrapper of kernel's ftrace
17 functionality. It only supports single thread tracing currently and
18 just reads trace_pipe in text and then write it to stdout.
20 The following options apply to perf ftrace.
27 Tracer to use: function_graph or function.
35 Trace on existing process id (comma separated list).
39 Force system-wide collection. Scripts run without a <command>
40 normally use -a by default, while scripts run with a <command>
41 normally don't - this option allows the latter to be run in
46 Only trace for the list of CPUs provided. Multiple CPUs can
47 be provided as a comma separated list with no space like: 0,1.
48 Ranges of CPUs are specified with -: 0-2.
49 Default is to trace on all online CPUs.
54 linkperf:perf-record[1], linkperf:perf-trace[1]