NAME

       trace-cmd-reset - turn off all Ftrace tracing to bring back full performance

SYNOPSIS

       trace-cmd reset [OPTIONS]

DESCRIPTION

       The trace-cmd(1) reset command turns off all tracing of Ftrace. This will bring back the
       performance of the system before tracing was enabled. This is necessary since
       trace-cmd-record(1), trace-cmd-stop(1) and trace-cmd-extract(1) do not disable the tracer,
       event after the data has been pulled from the buffers. The rational is that the user may
       want to manually enable the tracer with the Ftrace pseudo file system, or examine other
       parts of Ftrace to see what trace-cmd did. After the reset command happens, the data in
       the ring buffer, and the options that were used are all lost.

OPTIONS

       -b buffer_size
           When the kernel boots, the Ftrace ring buffer is of a minimal size (3 pages per CPU).
           The first time the tracer is used, the ring buffer size expands to what it was set for
           (default 1.4 Megs per CPU).

               If no more tracing is to be done, this option allows you to shrink the
               ring buffer down to free up available memory.

               trace-cmd reset -b 1

       -B buffer-name
           If the kernel supports multiple buffers, this will reset the trace for only the given
           buffer. It does not affect any other buffer. This may be used multiple times to
           specify different buffers. The top level buffer will not be reset if this option is
           given (unless the -t option is also supplied).

       -d
           Delete the previously specified buffer instance that was specified by the -B option.
           It is invalid to use with -t as the top level instance can not be deleted.

       -t
           Resets the top level instance buffer. Without the -B option this is the same as the
           default. But if -B is used, this is required if the top level instance buffer should
           also be reset.

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-split(1), trace-cmd-list(1),
       trace-cmd-listen(1)

AUTHOR

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

RESOURCES

       git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/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

        1. rostedt@goodmis.org
           mailto:rostedt@goodmis.org

                                            05/06/2015                         TRACE-CMD-RESET(1)