TRACE-CMD-DUMP(1) libtracefs Manual TRACE-CMD-DUMP(1)
NAME
trace-cmd-dump - show a meta data from a trace file, created by
trace-cmd record
SYNOPSIS
trace-cmd dump [OPTIONS] [input-file]
DESCRIPTION
The trace-cmd(1) dump command will display the meta data from a trace
file created by trace-cmd record.
OPTIONS
-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
EXAMPLES
# 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
SEE ALSO
trace-cmd(1), trace-cmd.dat(1)
AUTHOR
Steven Rostedt <rostedt@goodmis.org[1]>, author of trace-cmd. Tzvetomir
Stoyanov <tz.stoyanov@gmail.com[2]>, author of this man page.
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
2. tz.stoyanov@gmail.com
mailto:tz.stoyanov@gmail.com
libtracefs 04/08/2024 TRACE-CMD-DUMP(1)
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