NAME
trace-cmd - interacts with Ftrace Linux kernel internal tracer
SYNOPSIS
trace-cmd COMMAND [OPTIONS]
DESCRIPTION
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.
COMMANDS
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
file.
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
OPTIONS
-h, --help
Display the help text.
Other options see the man page for the corresponding command.
SEE ALSO
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)
AUTHOR
Written by Steven Rostedt, <rostedt [AT] goodmis.org [1] >
RESOURCES
https://git.kernel.org/pub/scm/utils/trace-cmd/trace-cmd.git/
COPYING
Copyright (C) 2010 Red Hat, Inc. Free use of this software is granted under the terms of the GNU Public License (GPL).
NOTES
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1. |
mailto:rostedt [AT] goodmis.org