NAME

       trace-cmd-show - show the contents of the Ftrace Linux kernel tracing buffer.

SYNOPSIS

       trace-cmd show [OPTIONS]

DESCRIPTION

       The trace-cmd(1) show displays the contents of one of the Ftrace Linux kernel tracing files: trace,
       snapshot, or trace_pipe. It is basically the equivalent of doing:

           cat /sys/kernel/debug/tracing/trace

OPTIONS

       -p
           Instead of displaying the contents of the "trace" file, use the "trace_pipe" file. The difference
           between the two is that the "trace" file is static. That is, if tracing is stopped, the "trace" file
           will show the same contents each time.

               The "trace_pipe" file is a consuming read, where a read of the file
               will consume the output of what was read and it will not read the
               same thing a second time even if tracing is stopped. This file
               als will block. If no data is available, trace-cmd show will stop
               and wait for data to appear.

       -s
           Instead of reading the "trace" file, read the snapshot file. The snapshot is made by an application
           writing into it and the kernel will perform as swap between the currently active buffer and the
           current snapshot buffer. If no more swaps are made, the snapshot will remain static. This is not a
           consuming read.

       -c cpu
           Read only the trace file for a specified CPU.

       -f
           Display the full path name of the file that is being displayed.

       -B buf
           If a buffer instance was created, then the -B option will access the files associated with the given
           buffer.

SEE ALSO

       trace-cmd(1), trace-cmd-record(1), trace-cmd-report(1), trace-cmd-start(1), trace-cmd-extract(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

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

                                                   01/29/2014                                  TRACE-CMD-SHOW(1)