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).
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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.
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-c
-
This option causes the above break up to be per CPU.
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trace-cmd split -c -p 10
-
This will create a file that has 10 pages per each CPU from the input.
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-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.
-
AUTHOR
Written by Steven Rostedt, <m[blue][email protected]m[][1]>
RESOURCES
git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/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.
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[email protected]
- mailto:[email protected]