trace-cmd-split - Man Page

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

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​.

-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​.

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)

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

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

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

1.

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

trace-cmd(1), trace-cmd-agent(1), trace-cmd-attach(1), trace-cmd-check-events(1), trace-cmd-clear(1), trace-cmd.dat.v6(5), trace-cmd.dat.v7(5), trace-cmd-extract(1), trace-cmd-hist(1), trace-cmd-list(1), trace-cmd-listen(1), trace-cmd-mem(1), trace-cmd-options(1), trace-cmd-profile(1), trace-cmd-record(1), trace-cmd-report(1), trace-cmd-reset(1), trace-cmd-restore(1), trace-cmd-set(1), trace-cmd-show(1), trace-cmd-snapshot(1), trace-cmd-stack(1), trace-cmd-start(1), trace-cmd-stat(1), trace-cmd-stop(1), trace-cmd-stream(1).