NAME¶

trace-cmd-stat - show the status of the tracing (ftrace) system

SYNOPSIS¶

trace-cmd stat

DESCRIPTION¶

The trace-cmd(1) stat displays the various status of the tracing (ftrace) system. The status that it shows is:

Instances: List all configured ftrace instances.

Tracer: if one of the tracers (like function_graph) is active. Otherwise nothing is displayed.

Events: Lists the events that are enable.

Event filters: Shows any filters that are set for any events

Function filters: Shows any filters for the function tracers

Graph functions: Shows any functions that the function graph tracer should graph

Buffers: Shows the trace buffer size if they have been expanded. By default, tracing buffers are in a compressed format until they are used. If they are compressed, the buffer display will not be shown.

Trace clock: If the tracing clock is anything other than the default "local" it will be displayed.

Trace CPU mask: If not all available CPUs are in the tracing CPU mask, then the tracing CPU mask will be displayed.

Trace max latency: Shows the value of the trace max latency if it is other than zero.

Kprobes: Shows any kprobes that are defined for tracing.

Uprobes: Shows any uprobes that are defined for tracing.

Error log: Dump the content of ftrace error_log file.

SEE ALSO¶

trace-cmd(1), trace-cmd-record(1), trace-cmd-report(1), trace-cmd-start(1), trace-cmd-stop(1), trace-cmd-extract(1), trace-cmd-reset(1), trace-cmd-split(1), trace-cmd-listen(1)

AUTHOR¶

Written by Steven Rostedt, <rostedt@goodmis.org[1]>

RESOURCES¶

https://git.kernel.org/pub/scm/utils/trace-cmd/trace-cmd.git/

COPYING¶

Copyright (C) 2014 Red Hat, Inc. Free use of this software is granted under the terms of the GNU Public License (GPL).

NOTES¶

1.

rostedt@goodmis.org