TRACE-CMD-SPLIT(1)             libtracefs Manual            TRACE-CMD-SPLIT(1)

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.

SEE ALSO
       trace-cmd(1), trace-cmd-record(1), trace-cmd-report(1),
       trace-cmd-start(1), trace-cmd-stop(1), trace-cmd-extract(1),
       trace-cmd-reset(1), trace-cmd-list(1), trace-cmd-listen(1)

AUTHOR
       Written by Steven Rostedt, <rostedt@goodmis.org[1]>

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

libtracefs                        04/07/2024                TRACE-CMD-SPLIT(1)