trace-cmd(1) interacts with Ftrace Linux kernel internal tracer




The trace-cmd(1) command interacts with the Ftrace tracer that is built inside the Linux kernel. It interfaces with the Ftrace specific files found in the debugfs file system under the tracing directory. A COMMAND must be specified to tell trace-cmd what to do.


record  - record a live trace and write a trace.dat file to the
          local disk or to the network.

report  - reads a trace.dat file and converts the binary data to a
          ASCII text readable format.

hist    - show a histogram of the events.

stat    - show tracing (ftrace) status of the running system

options - list the plugin options that are available to *report*

start   - start the tracing without recording to a trace.dat file.

stop    - stop tracing (only disables recording, overhead of tracer
          is still in effect)

restart - restart tracing from a previous stop (only effects recording)

extract - extract the data from the kernel buffer and create a trace.dat

reset   - disables all tracing and gives back the system performance.
          (clears all data from the kernel buffers)

split   - splits a trace.dat file into smaller files.

list    - list the available plugins or events that can be recorded.

listen  - open up a port to listen for remote tracing connections.

restore - restore the data files of a crashed run of trace-cmd record

stack   - run and display the stack tracer

check-events - parse format strings for all trace events and return
               whether all formats are parseable


-h, --help

Display the help text.

Other options see the man page for the corresponding command.


Written by Steven Rostedt, <m[blue][email protected]m[][1]>




Copyright (C) 2010 Red Hat, Inc. Free use of this software is granted under the terms of the GNU Public License (GPL).