trace-cmd stat [Options]
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.
- -B buffer-name
Display the status of a given buffer instance. May be specified more than once to display the status of multiple instances.
If -B is also specified, show the status of the top level tracing directory as well as the instance(s).
Display the all the options along with their values. If they start with "no", then the option is disabled.
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)
Written by Steven Rostedt, <email@example.com>
Copyright (C) 2014 Red Hat, Inc. Free use of this software is granted under the terms of the GNU Public License (GPL).