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TRACE-CMD-DUMP(1) libtracefs Manual TRACE-CMD-DUMP(1)
trace-cmd-dump - show a meta data from a trace file, created by trace-cmd record
trace-cmd dump [OPTIONS] [input-file]
The trace-cmd(1) dump command will display the meta data from a trace file created by trace-cmd record.
-i input-file By default, trace-cmd dump will read the file trace.dat. But the -i option open up the given input-file instead. Note, the input file may also be specified as the last item on the command line. -v, --validate Check if the input file is a valid trace file, created by trace-cmd. --summary Print a meta data summary - initial format and a short description of each file section. This is the default action, if no arguments are specified. --head-page Print the header page information, stored in the file. --head-event Print the event header information, stored in the file. --ftrace-events Print formats of ftrace specific events. --systems Print information of event systems, stored in the file - name and number of events for each system. --events Print formats of all events, stored in the file. --kallsyms Print information of the mapping of function addresses to the function names. --printk Print trace_printk() format strings, stored in the file. --cmd-lines Print mapping a PID to a process name. --options Print all options, stored in the file. --flyrecord Print the offset and the size of tracing data per each CPU. --clock Print the trace clock, used for timestamp of the tracing events, stored in the file. --all Print all meta data from the file. --help Print usage information. --verbose[=level] Set the log level. Supported log levels are "none", "critical", "error", "warning", "info", "debug", "all" or their identifiers "0", "1", "2", "3", "4", "5", "6". Setting the log level to specific value enables all logs from that and all previous levels. The level will default to "info" if one is not specified. Example: enable all critical, error and warning logs trace-cmd report --verbose=warning
# trace-cmd dump --summary -i trace.dat Tracing meta data in file trace.dat: [Initial format] 6 [Version] 0 [Little endian] 8 [Bytes in a long] 4096 [Page size, bytes] [Header info, 205 bytes] [Header event, 205 bytes] [Ftrace format, 15 events] [Events format, 2 systems] [Kallsyms, 7144493 bytes] [Trace printk, 2131 bytes] [Saved command lines, 117 bytes] 8 [CPUs with tracing data] [12 options] [Flyrecord tracing data] # trace-cmd dump --flyrecord -i trace.dat [Flyrecord tracing data] 7176192 0 [offset, size of cpu 0] 7176192 0 [offset, size of cpu 1] 7176192 0 [offset, size of cpu 2] 7176192 4096 [offset, size of cpu 3] 7180288 4096 [offset, size of cpu 4] 7184384 0 [offset, size of cpu 5] 7184384 0 [offset, size of cpu 6] 7184384 0 [offset, size of cpu 7] # trace-cmd dump --summary --systems -i trace.dat Tracing meta data in file trace.dat: [Initial format] 6 [Version] 0 [Little endian] 8 [Bytes in a long] 4096 [Page size, bytes] [Header info, 205 bytes] [Header event, 205 bytes] [Ftrace format, 15 events] [Events format, 3 systems] sched 23 [system, events] irq 5 [system, events] kvm 70 [system, events] [Kallsyms, 7144493 bytes] [Trace printk, 2131 bytes] [Saved command lines, 157 bytes] 8 [CPUs with tracing data] [11 options] [Flyrecord tracing data] # trace-cmd dump --summary --systems -i trace.dat File trace.dat is a valid trace-cmd file
trace-cmd(1), trace-cmd.dat(1)
Steven Rostedt <[email protected][1]>, author of trace-cmd. Tzvetomir Stoyanov <[email protected][2]>, author of this man page.
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. [email protected] mailto:[email protected] 2. [email protected] mailto:[email protected]
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 [email protected]
libtracefs 09/24/2023 TRACE-CMD-DUMP(1)