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-rw-r--r--tools/power/pm-graph/bootgraph.861
1 files changed, 46 insertions, 15 deletions
diff --git a/tools/power/pm-graph/bootgraph.8 b/tools/power/pm-graph/bootgraph.8
index 55272a67b0e7..dbdafcf546df 100644
--- a/tools/power/pm-graph/bootgraph.8
+++ b/tools/power/pm-graph/bootgraph.8
@@ -8,14 +8,23 @@ bootgraph \- Kernel boot timing analysis
.RB [ COMMAND ]
.SH DESCRIPTION
\fBbootgraph \fP reads the dmesg log from kernel boot and
-creates an html representation of the initcall timeline up to the start
-of the init process.
+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 bootgraph.html.
+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
@@ -28,15 +37,18 @@ Print the current tool version
Add the dmesg log to the html output. It will be viewable by
clicking a button in the timeline.
.TP
-\fB-o \fIfile\fR
-Override the HTML output filename (default: bootgraph.html)
-.SS "Ftrace Debug"
+\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\fR
Use ftrace to add function detail (default: disabled)
.TP
\fB-callgraph\fR
-Use ftrace to create initcall callgraphs (default: disabled). If -filter
+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
@@ -50,16 +62,19 @@ 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-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-filter \fI"func1,func2,..."\fR
+\fB-func \fI"func1,func2,..."\fR
Instead of tracing each initcall, trace a custom list of functions (default: do_one_initcall)
-
-.SH COMMANDS
.TP
\fB-reboot\fR
Reboot the machine and generate a new timeline automatically. Works in 4 steps.
@@ -73,16 +88,23 @@ 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 -filter argument.
+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.
@@ -93,13 +115,13 @@ 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 name.
+Create a timeline using the current dmesg, add the log to the html and change the folder.
.IP
-\f(CW$ bootgraph -addlogs -o myboot.html\fR
+\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 latestboot.html\fR
+\f(CW$ sudo bootgraph -reboot -addlogs -o "latest-{hostname)"\fR
.PP
Capture a new boot timeline with function trace data.
.IP
@@ -111,7 +133,7 @@ Capture a new boot timeline with trace & callgraph data. Skip callgraphs smaller
.PP
Capture a new boot timeline with callgraph data over custom functions.
.IP
-\f(CW$ sudo bootgraph -reboot -callgraph -filter "acpi_ps_parse_aml,msleep"\fR
+\f(CW$ sudo bootgraph -reboot -callgraph -func "acpi_ps_parse_aml,msleep"\fR
.PP
Capture a brand new boot timeline with manual reboot.
.IP
@@ -123,6 +145,15 @@ Capture a brand new boot timeline with manual reboot.
.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)