# trace-cmd-split

## NAME



           trace-cmd-split - split a trace.dat file into smaller files
    


## SYNOPSIS



           **trace-cmd split**[_OPTIONS_] [_start-time_ [_end-time_]]
    


## DESCRIPTION



           The trace-cmd(1) split is used to break up a trace.dat into small
           files. The _start-time_ specifies where the new file will start at.
           Using trace-cmd-report(1) and copying the time stamp given at a
           particular event, can be used as input for either _start-time_ or
           _end-time_. The split will stop creating files when it reaches an
           event after _end-time_. If only the end-time is needed, use 0.0 as
           the start-time.
    
           If start-time is left out, then the split will start at the
           beginning of the file. If end-time is left out, then split will
           continue to the end unless it meets one of the requirements
           specified by the options.
    


## OPTIONS



           **-i** _file_
               If this option is not specified, then the split command will
               look for the file named _trace.dat_. This options will allow the
               reading of another file other than _trace.dat_.
    
           **-o** _file_
               By default, the split command will use the input file name as
               a basis of where to write the split files. The output file
               will be the input file with an attached '.#\' to the end:
               trace.dat.1, trace.dat.2, etc.
    
                   This option will change the name of the base file used.
    
                   -o file  will create file.1, file.2, etc.
    
           **-s** _seconds_
               This specifies how many seconds should be recorded before the
               new file should stop.
    
           **-m** _milliseconds_
               This specifies how many milliseconds should be recorded before
               the new file should stop.
    
           **-u** _microseconds_
               This specifies how many microseconds should be recorded before
               the new file should stop.
    
           **-e** _events_
               This specifies how many events should be recorded before the
               new file should stop.
    
           **-p** _pages_
               This specifies the number of pages that should be recorded
               before the new file should stop.
    
                   Note: only one of *-p*, *-e*, *-u*, *-m*, *-s* may be specified at a time.
    
                   If *-p* is specified, then *-c* is automatically set.
    
           **-r**
               This option causes the break up to repeat until end-time is
               reached (or end of the input if end-time is not specified).
    
                   trace-cmd split -r -e 10000
    
                   This will break up trace.dat into several smaller files, each with at most
                   10,000 events in it.
    
           **-c**
               This option causes the above break up to be per CPU.
    
                   trace-cmd split -c -p 10
    
                   This will create a file that has 10 pages per each CPU from the input.
    
           **-C** _cpu_
               This option will split for a single CPU. Only the cpu named
               will be extracted from the file.
    
                   trace-cmd split -C 1
    
                   This will split out all the events for cpu 1 in the file.
    
           **--top**
               This allows to keep the top buffer. The top buffer can be
               renamed using the _-b_ option.
    
                   trace-cmd split --top
    
                   This will keep only the top buffer.
    
                   trace-cmd split --top -b old_top
    
                   This will keep only the top buffer and rename it 'old_top'.
    
           **-B** _buffer_
               This allows to keep the selected buffer. A buffer can be
               promoted to the top buffer using the _-t_ option.
    
                   trace-cmd split -B timer -B sched
    
                   This will keep the 'timer' and 'sched' buffers.
    
                   trace-cmd split -B timer -t -B sched
    
                   This will keep the 'timer' and 'sched' buffers, with the events
                   from the 'timer' buffer promoted to the top instance.
    


## RESOURCES



           **https://git.kernel.org/pub/scm/utils/trace-cmd/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
    


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