TRACE-CMD(1) libtracefs Manual TRACE-CMD(1)

trace-cmd - 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.
set     - set a ftrace configuration parameter.
report  - reads a trace.dat file and converts the binary data to a
          ASCII text readable format.
stream  - Start tracing and read the output directly
profile - Start profiling and read the output directly
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
show    - display the contents of one of the Ftrace Linux kernel tracing files
reset   - disables all tracing and gives back the system performance.
          (clears all data from the kernel buffers)
clear   - clear the content of the Ftrace ring 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.
agent   - listen on a vsocket for trace clients
setup-guest - create FIFOs for tracing guest VMs
restore - restore the data files of a crashed run of trace-cmd record
snapshot- take snapshot of running trace
stack   - run and display the stack tracer
check-events - parse format strings for all trace events and return
               whether all formats are parseable
convert   - convert trace files
attach   - attach a host trace.dat file to a guest trace.dat file
dump    - read out the meta data from a trace file

-h, --help

Display the help text.

Other options see the man page for the corresponding command.

trace-cmd-record(1), trace-cmd-report(1), trace-cmd-hist(1), trace-cmd-start(1), trace-cmd-stop(1), trace-cmd-extract(1), trace-cmd-reset(1), trace-cmd-restore(1), trace-cmd-stack(1), trace-cmd-convert(1), trace-cmd-split(1), trace-cmd-list(1), trace-cmd-listen(1), trace-cmd.dat(5), trace-cmd-check-events(1), trace-cmd-stat(1), trace-cmd-attach(1)

Written by Steven Rostedt, <[1]>

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

04/07/2024 libtracefs