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    Command:

    trace-cmd-extract

    
    
    

    SYNOPSIS

           trace-cmd extract [OPTIONS]
    
    
    

    DESCRIPTION

           The trace-cmd(1) extract is usually used after trace-cmd-start(1) and
           trace-cmd-stop(1). It can be used after the Ftrace tracer has been
           started manually through the Ftrace pseudo file system.
    
           The extract command creates a trace.dat file that can be used by
           trace-cmd-report(1) to read from. It reads the kernel internal ring
           buffer to produce the trace.dat file.
    
    
    

    OPTIONS

           -p plugin
               Although extract does not start any traces, some of the plugins
               require just reading the output in ASCII format. These are the
               latency tracers, since the latency tracers have a separate internal
               buffer. The plugin option is therefore only necessary for the
               wakeup, wakeup-rt, irqsoff, preemptoff and preemptirqsoff plugins.
    
                   With out this option, the extract command will extract from the internal
                   Ftrace buffers.
    
           -O option
               If a latency tracer is being extracted, and the -p option is used,
               then there are some Ftrace options that can change the format. This
               will update those options before extracting. To see the list of
               options see trace-cmd-list. To enable an option, write its name, to
               disable the option append the characters no to it. For example:
               noprint-parent will disable the print-parent option that prints the
               parent function in printing a function event.
    
           -o outputfile
               By default, the extract command will create a trace.dat file. This
               option will change where the file is written to.
    
    
    

    SEE ALSO

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

    
    
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