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   trace-cmd-show    ( 1 )

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Имя (Name)

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

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Синопсис (Synopsis)

trace-cmd show [OPTIONS]

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Описание (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

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Параметры (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.

       --tracing_on
           Show if tracing is on for the given instance.

       --current_tracer
           Show what the current tracer is.

       --buffer_size
           Show the current buffer size (per-cpu)

       --buffer_total_size
           Show the total size of all buffers.

       --ftrace_filter
           Show what function filters are set.

       --ftrace_notrace
           Show what function disabled filters are set.

       --ftrace_pid
           Show the PIDs the function tracer is limited to (if any).

       --graph_function
           Show the functions that will be graphed.

       --graph_notrace
           Show the functions that will not be graphed.

       --cpumask
           Show the mask of CPUs that tracing will trace.

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Смотри также (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)

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