trace-cmd-split(1) — Linux manual page

NAME | SYNOPSIS | DESCRIPTION | OPTIONS | SEE ALSO | AUTHOR | RESOURCES | COPYING | NOTES | COLOPHON

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

NAME         top

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

SYNOPSIS         top

       trace-cmd split [OPTIONS] [start-time [end-time]]

DESCRIPTION         top

       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         top

       -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.

SEE ALSO         top

       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         top

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

RESOURCES         top

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

COPYING         top

       Copyright (C) 2010 Red Hat, Inc. Free use of this software is
       granted under the terms of the GNU Public License (GPL).

NOTES         top

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

COLOPHON         top

       This page is part of the trace-cmd (a front-end for Ftrace)
       project.  Information about the project can be found at 
       ⟨https://www.trace-cmd.org/⟩.  If you have a bug report for this
       manual page, see ⟨https://www.trace-cmd.org/⟩.  This page was
       obtained from the project's upstream Git repository
       ⟨https://git.kernel.org/pub/scm/utils/trace-cmd/trace-cmd.git⟩ on
       2024-06-14.  (At that time, the date of the most recent commit
       that was found in the repository was 2024-02-22.)  If you
       discover any rendering problems in this HTML version of the page,
       or you believe there is a better or more up-to-date source for
       the page, or you have corrections or improvements to the
       information in this COLOPHON (which is not part of the original
       manual page), send a mail to man-pages@man7.org

libtracefs                     06/13/2024             TRACE-CMD-SPLIT(1)

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