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   trace-cmd-snapshot    ( 1 )

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Имя (Name)

trace-cmd-snapshot - take, reset, free, or show a Ftrace kernel
       snapshot

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Синопсис (Synopsis)

trace-cmd snapshot [OPTIONS]

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Описание (Description)

The trace-cmd(1) snapshot controls or displays the Ftrace Linux
       kernel snapshot feature (if the kernel supports it). This is
       useful to "freeze" an instance of a live trace but without
       stopping the trace.

            trace-cmd start -p function
            trace-cmd snapshot -s
            trace-cmd snapshot
           [ dumps the content of buffer at 'trace-cmd snapshot -s' ]
            trace-cmd snapshot -s
            trace-cmd snapshot
           [ dumps the new content of the buffer at the last -s operation ]

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Параметры (Options)

-s
           Take a snapshot of the currently running buffer.

       -r
           Clear out the buffer.

       -f
           Free the snapshot buffer. The buffer takes up memory inside
           the kernel. It is best to free it when not in use. The first
           -s operation will allocate it if it is not already allocated.

       -c cpu
           Operate on a per cpu snapshot (may not be fully supported by
           all kernels)

       -B buf
           If a buffer instance was created, then the -B option will
           operate on the snapshot within the buffer.

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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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