mirror of
https://github.com/torvalds/linux.git
synced 2024-12-05 10:32:35 +00:00
d83a76a8ec
- add -cgskip option to reduce callgraph output size - add -cgfilter option to focus on a list of devices - add -result option for exporting batch test results - removed all phoronix hooks, use -result to enable batch testing - changed argument -f to match sleegraph, -f = -callgraph - use -fstat for function status instead of -f - add -verbose option to print out timeline stats and kernel options - include command string and kernel params in timeline output header Signed-off-by: Todd Brandt <todd.e.brandt@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
174 lines
5.5 KiB
Groff
174 lines
5.5 KiB
Groff
.TH BOOTGRAPH 8
|
|
.SH NAME
|
|
bootgraph \- Kernel boot timing analysis
|
|
.SH SYNOPSIS
|
|
.ft B
|
|
.B bootgraph
|
|
.RB [ OPTIONS ]
|
|
.RB [ COMMAND ]
|
|
.SH DESCRIPTION
|
|
\fBbootgraph \fP reads the dmesg log from kernel boot and
|
|
creates an html representation of the initcall timeline. It graphs
|
|
every module init call found, through both kernel and user modes. The
|
|
timeline is split into two phases: kernel mode & user mode. kernel mode
|
|
represents a single process run on a single cpu with serial init calls.
|
|
Once user mode begins, the init process is called, and the init calls
|
|
start working in parallel.
|
|
.PP
|
|
If no specific command is given, the tool reads the current dmesg log and
|
|
outputs a new timeline.
|
|
.PP
|
|
The tool can also augment the timeline with ftrace data on custom target
|
|
functions as well as full trace callgraphs.
|
|
.PP
|
|
Generates output files in subdirectory: boot-yymmdd-HHMMSS
|
|
html timeline : <hostname>_boot.html
|
|
raw dmesg file : <hostname>_boot_dmesg.txt
|
|
raw ftrace file : <hostname>_boot_ftrace.txt
|
|
.SH OPTIONS
|
|
.TP
|
|
\fB-h\fR
|
|
Print this help text
|
|
.TP
|
|
\fB-v\fR
|
|
Print the current tool version
|
|
.TP
|
|
\fB-addlogs\fR
|
|
Add the dmesg log to the html output. It will be viewable by
|
|
clicking a button in the timeline.
|
|
.TP
|
|
\fB-result \fIfile\fR
|
|
Export a results table to a text file for parsing.
|
|
.TP
|
|
\fB-o \fIname\fR
|
|
Overrides the output subdirectory name when running a new test.
|
|
Use {date}, {time}, {hostname} for current values.
|
|
.sp
|
|
e.g. boot-{hostname}-{date}-{time}
|
|
.SS "advanced"
|
|
.TP
|
|
\fB-f or -callgraph\fR
|
|
Use ftrace to create initcall callgraphs (default: disabled). If -func
|
|
is not used there will be one callgraph per initcall. This can produce
|
|
very large outputs, i.e. 10MB - 100MB.
|
|
.TP
|
|
\fB-fstat\fR
|
|
Use ftrace to add function detail (default: disabled)
|
|
.TP
|
|
\fB-maxdepth \fIlevel\fR
|
|
limit the callgraph trace depth to \fIlevel\fR (default: 2). This is
|
|
the best way to limit the output size when using -callgraph.
|
|
.TP
|
|
\fB-mincg \fIt\fR
|
|
Discard all callgraphs shorter than \fIt\fR milliseconds (default: 0=all).
|
|
This reduces the html file size as there can be many tiny callgraphs
|
|
which are barely visible in the timeline.
|
|
The value is a float: e.g. 0.001 represents 1 us.
|
|
.TP
|
|
\fB-cgfilter \fI"func1,func2,..."\fR
|
|
Reduce callgraph output in the timeline by limiting it to a list of calls. The
|
|
argument can be a single function name or a comma delimited list.
|
|
(default: none)
|
|
.TP
|
|
\fB-cgskip \fIfile\fR
|
|
Reduce callgraph output in the timeline by skipping over uninteresting
|
|
functions in the trace, e.g. printk or console_unlock. The functions listed
|
|
in this file will show up as empty leaves in the callgraph with only the start/end
|
|
times displayed.
|
|
(default: none)
|
|
.TP
|
|
\fB-timeprec \fIn\fR
|
|
Number of significant digits in timestamps (0:S, 3:ms, [6:us])
|
|
.TP
|
|
\fB-expandcg\fR
|
|
pre-expand the callgraph data in the html output (default: disabled)
|
|
.TP
|
|
\fB-func \fI"func1,func2,..."\fR
|
|
Instead of tracing each initcall, trace a custom list of functions (default: do_one_initcall)
|
|
.TP
|
|
\fB-reboot\fR
|
|
Reboot the machine and generate a new timeline automatically. Works in 4 steps.
|
|
1. updates grub with the required kernel parameters
|
|
2. installs a cron job which re-runs the tool after reboot
|
|
3. reboots the system
|
|
4. after startup, extracts the data and generates the timeline
|
|
.TP
|
|
\fB-manual\fR
|
|
Show the requirements to generate a new timeline manually. Requires 3 steps.
|
|
1. append the string to the kernel command line via your native boot manager.
|
|
2. reboot the system
|
|
3. after startup, re-run the tool with the same arguments and no command
|
|
|
|
.SH COMMANDS
|
|
.SS "rebuild"
|
|
.TP
|
|
\fB-dmesg \fIfile\fR
|
|
Create HTML output from an existing dmesg file.
|
|
.TP
|
|
\fB-ftrace \fIfile\fR
|
|
Create HTML output from an existing ftrace file (used with -dmesg).
|
|
.SS "other"
|
|
.TP
|
|
\fB-flistall\fR
|
|
Print all ftrace functions capable of being captured. These are all the
|
|
possible values you can add to trace via the -func argument.
|
|
.TP
|
|
\fB-sysinfo\fR
|
|
Print out system info extracted from BIOS. Reads /dev/mem directly instead of going through dmidecode.
|
|
|
|
.SH EXAMPLES
|
|
Create a timeline using the current dmesg log.
|
|
.IP
|
|
\f(CW$ bootgraph\fR
|
|
.PP
|
|
Create a timeline using the current dmesg and ftrace log.
|
|
.IP
|
|
\f(CW$ bootgraph -callgraph\fR
|
|
.PP
|
|
Create a timeline using the current dmesg, add the log to the html and change the folder.
|
|
.IP
|
|
\f(CW$ bootgraph -addlogs -o "myboot-{date}-{time}"\fR
|
|
.PP
|
|
Capture a new boot timeline by automatically rebooting the machine.
|
|
.IP
|
|
\f(CW$ sudo bootgraph -reboot -addlogs -o "latest-{hostname)"\fR
|
|
.PP
|
|
Capture a new boot timeline with function trace data.
|
|
.IP
|
|
\f(CW$ sudo bootgraph -reboot -f\fR
|
|
.PP
|
|
Capture a new boot timeline with trace & callgraph data. Skip callgraphs smaller than 5ms.
|
|
.IP
|
|
\f(CW$ sudo bootgraph -reboot -callgraph -mincg 5\fR
|
|
.PP
|
|
Capture a new boot timeline with callgraph data over custom functions.
|
|
.IP
|
|
\f(CW$ sudo bootgraph -reboot -callgraph -func "acpi_ps_parse_aml,msleep"\fR
|
|
.PP
|
|
Capture a brand new boot timeline with manual reboot.
|
|
.IP
|
|
\f(CW$ sudo bootgraph -callgraph -manual\fR
|
|
.IP
|
|
\f(CW$ vi /etc/default/grub # add the CMDLINE string to your kernel params\fR
|
|
.IP
|
|
\f(CW$ sudo reboot # reboot the machine\fR
|
|
.IP
|
|
\f(CW$ sudo bootgraph -callgraph # re-run the tool after restart\fR
|
|
.PP
|
|
.SS "rebuild timeline from logs"
|
|
.PP
|
|
Rebuild the html from a previous run's logs, using the same options.
|
|
.IP
|
|
\f(CW$ bootgraph -dmesg dmesg.txt -ftrace ftrace.txt -callgraph\fR
|
|
.PP
|
|
Rebuild the html with different options.
|
|
.IP
|
|
\f(CW$ bootgraph -dmesg dmesg.txt -ftrace ftrace.txt -addlogs\fR
|
|
|
|
.SH "SEE ALSO"
|
|
dmesg(1), update-grub(8), crontab(1), reboot(8)
|
|
.PP
|
|
.SH AUTHOR
|
|
.nf
|
|
Written by Todd Brandt <todd.e.brandt@linux.intel.com>
|