293 lines
9.5 KiB
Groff
293 lines
9.5 KiB
Groff
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.TH SLEEPGRAPH 8
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.SH NAME
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sleepgraph \- Suspend/Resume timing analysis
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.SH SYNOPSIS
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.ft B
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.B sleepgraph
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.RB [ OPTIONS ]
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.RB [ COMMAND ]
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.SH DESCRIPTION
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\fBsleepgraph \fP is designed to assist kernel and OS developers
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in optimizing their linux stack's suspend/resume time. Using a kernel
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image built with a few extra options enabled, the tool will execute a
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suspend and capture dmesg and ftrace data until resume is complete.
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This data is transformed into a device timeline and an optional
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callgraph to give a detailed view of which devices/subsystems are
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taking the most time in suspend/resume.
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.PP
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If no specific command is given, the default behavior is to initiate
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a suspend/resume.
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.PP
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Generates output files in subdirectory: suspend-yymmdd-HHMMSS
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html timeline : <hostname>_<mode>.html
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raw dmesg file : <hostname>_<mode>_dmesg.txt
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raw ftrace file : <hostname>_<mode>_ftrace.txt
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.SH OPTIONS
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.TP
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\fB-h\fR
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Print the help text.
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.TP
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\fB-v\fR
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Print the current tool version.
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.TP
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\fB-verbose\fR
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Print extra information during execution and analysis.
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.TP
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\fB-config \fIfile\fR
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Pull arguments and config options from a file.
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.TP
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\fB-m \fImode\fR
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Mode to initiate for suspend e.g. standby, freeze, mem (default: mem).
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.TP
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\fB-o \fIname\fR
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Overrides the output subdirectory name when running a new test.
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Use {date}, {time}, {hostname} for current values.
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.sp
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e.g. suspend-{hostname}-{date}-{time}
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.TP
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\fB-rtcwake \fIt\fR | off
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Use rtcwake to autoresume after \fIt\fR seconds (default: 15). Set t to "off" to
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disable rtcwake and require a user keypress to resume.
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.TP
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\fB-addlogs\fR
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Add the dmesg and ftrace logs to the html output. They will be viewable by
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clicking buttons in the timeline.
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.TP
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\fB-result \fIfile\fR
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Export a results table to a text file for parsing.
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.TP
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\fB-sync\fR
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Sync the filesystems before starting the test. This reduces the size of
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the sys_sync call which happens in the suspend_prepare phase.
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.TP
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\fB-rs \fIenable/disable\fR
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During test, enable/disable runtime suspend for all devices. The test is delayed
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by 5 seconds to allow runtime suspend changes to occur. The settings are restored
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after the test is complete.
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.TP
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\fB-display \fIon/off\fR
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Turn the display on or off for the test using the xset command. This helps
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maintain the consistecy of test data for better comparison.
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.TP
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\fB-skiphtml\fR
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Run the test and capture the trace logs, but skip the timeline generation.
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.SS "advanced"
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.TP
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\fB-gzip\fR
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Gzip the trace and dmesg logs to save space. The tool can also read in gzipped
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logs for processing.
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.TP
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\fB-cmd \fIstr\fR
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Run the timeline over a custom suspend command, e.g. pm-suspend. By default
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the tool forces suspend via /sys/power/state so this allows testing over
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an OS's official suspend method. The output file will change to
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hostname_command.html and will autodetect which suspend mode was triggered.
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.TP
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\fB-filter \fI"d1,d2,..."\fR
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Filter out all but these device callbacks. These strings can be device names
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or module names. e.g. 0000:00:02.0, ata5, i915, usb, etc.
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.TP
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\fB-mindev \fIt\fR
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Discard all device callbacks shorter than \fIt\fR milliseconds (default: 0.0).
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This reduces the html file size as there can be many tiny callbacks which are barely
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visible. The value is a float: e.g. 0.001 represents 1 us.
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.TP
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\fB-proc\fR
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Add usermode process info into the timeline (default: disabled).
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.TP
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\fB-dev\fR
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Add kernel source calls and threads to the timeline (default: disabled).
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.TP
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\fB-x2\fR
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Run two suspend/resumes back to back (default: disabled).
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.TP
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\fB-x2delay \fIt\fR
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Include \fIt\fR ms delay between multiple test runs (default: 0 ms).
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.TP
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\fB-predelay \fIt\fR
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Include \fIt\fR ms delay before 1st suspend (default: 0 ms).
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.TP
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\fB-postdelay \fIt\fR
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Include \fIt\fR ms delay after last resume (default: 0 ms).
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.TP
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\fB-multi \fIn d\fR
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Execute \fIn\fR consecutive tests at \fId\fR seconds intervals. The outputs will
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be created in a new subdirectory with a summary page: suspend-xN-{date}-{time}.
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.SS "ftrace debug"
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.TP
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\fB-f\fR
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Use ftrace to create device callgraphs (default: disabled). This can produce
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very large outputs, i.e. 10MB - 100MB.
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.TP
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\fB-maxdepth \fIlevel\fR
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limit the callgraph trace depth to \fIlevel\fR (default: 0=all). This is
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the best way to limit the output size when using callgraphs via -f.
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.TP
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\fB-expandcg\fR
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pre-expand the callgraph data in the html output (default: disabled)
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.TP
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\fB-fadd \fIfile\fR
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Add functions to be graphed in the timeline from a list in a text file
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.TP
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\fB-mincg \fIt\fR
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Discard all callgraphs shorter than \fIt\fR milliseconds (default: 0.0).
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This reduces the html file size as there can be many tiny callgraphs
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which are barely visible in the timeline.
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The value is a float: e.g. 0.001 represents 1 us.
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.TP
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\fB-cgfilter \fI"func1,func2,..."\fR
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Reduce callgraph output in the timeline by limiting it to a list of calls. The
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argument can be a single function name or a comma delimited list.
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(default: none)
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.TP
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\fB-cgskip \fIfile\fR
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Reduce callgraph timeline size by skipping over uninteresting functions
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in the trace, e.g. printk or console_unlock. The functions listed
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in this file will show up as empty leaves in the callgraph with only the start/end
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times displayed. cgskip.txt is used automatically if found in the path, so
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use "off" to disable completely (default: cgskip.txt)
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.TP
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\fB-cgphase \fIp\fR
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Only show callgraph data for phase \fIp\fR (e.g. suspend_late).
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.TP
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\fB-cgtest \fIn\fR
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In an x2 run, only show callgraph data for test \fIn\fR (e.g. 0 or 1).
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.TP
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\fB-timeprec \fIn\fR
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Number of significant digits in timestamps (0:S, [3:ms], 6:us).
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.TP
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\fB-bufsize \fIN\fR
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Set trace buffer size to N kilo-bytes (default: all of free memory up to 3GB)
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.SH COMMANDS
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.TP
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\fB-summary \fIindir\fR
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Create a summary page of all tests in \fIindir\fR. Creates summary.html
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in the current folder. The output page is a table of tests with
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suspend and resume values sorted by suspend mode, host, and kernel.
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Includes test averages by mode and links to the test html files.
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Use -genhtml to include tests with missing html.
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.TP
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\fB-modes\fR
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List available suspend modes.
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.TP
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\fB-status\fR
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Test to see if the system is able to run this tool. Use this along
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with any options you intend to use to see if they will work.
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.TP
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\fB-fpdt\fR
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Print out the contents of the ACPI Firmware Performance Data Table.
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.TP
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\fB-battery\fR
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Print out battery status and current charge.
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.TP
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\fB-sysinfo\fR
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Print out system info extracted from BIOS. Reads /dev/mem directly instead of going through dmidecode.
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.TP
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\fB-devinfo\fR
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Print out the pm settings of all devices which support runtime suspend.
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.TP
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\fB-flist\fR
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Print the list of ftrace functions currently being captured. Functions
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that are not available as symbols in the current kernel are shown in red.
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By default, the tool traces a list of important suspend/resume functions
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in order to better fill out the timeline. If the user has added their own
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with -fadd they will also be checked.
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.TP
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\fB-flistall\fR
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Print all ftrace functions capable of being captured. These are all the
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possible values you can add to trace via the -fadd argument.
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.SS "rebuild"
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.TP
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\fB-ftrace \fIfile\fR
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Create HTML output from an existing ftrace file.
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.TP
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\fB-dmesg \fIfile\fR
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Create HTML output from an existing dmesg file.
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.SH EXAMPLES
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.SS "simple commands"
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Check which suspend modes are currently supported.
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.IP
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\f(CW$ sleepgraph -modes\fR
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.PP
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Read the Firmware Performance Data Table (FPDT)
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.IP
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\f(CW$ sudo sleepgraph -fpdt\fR
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.PP
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Print out the current USB power topology
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.IP
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\f(CW$ sleepgraph -usbtopo
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.PP
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Verify that you can run a command with a set of arguments
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.IP
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\f(CW$ sudo sleepgraph -f -rtcwake 30 -status
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.PP
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Generate a summary of all timelines in a particular folder.
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.IP
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\f(CW$ sleepgraph -summary ~/workspace/myresults/\fR
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.PP
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.SS "capturing basic timelines"
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Execute a mem suspend with a 15 second wakeup. Include the logs in the html.
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.IP
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\f(CW$ sudo sleepgraph -rtcwake 15 -addlogs\fR
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.PP
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Execute a standby with a 15 second wakeup. Change the output folder name.
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.IP
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\f(CW$ sudo sleepgraph -m standby -rtcwake 15 -o "standby-{host}-{date}-{time}"\fR
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.PP
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Execute a freeze with no wakeup (require keypress). Change output folder name.
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.IP
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\f(CW$ sudo sleepgraph -m freeze -rtcwake off -o "freeze-{hostname}-{date}-{time}"\fR
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.PP
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.SS "capturing advanced timelines"
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Execute a suspend & include dev mode source calls, limit callbacks to 5ms or larger.
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.IP
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\f(CW$ sudo sleepgraph -m mem -rtcwake 15 -dev -mindev 5\fR
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.PP
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Run two suspends back to back, include a 500ms delay before, after, and in between runs.
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.IP
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\f(CW$ sudo sleepgraph -m mem -rtcwake 15 -x2 -predelay 500 -x2delay 500 -postdelay 500\fR
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.PP
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Do a batch run of 10 freezes with 30 seconds delay between runs.
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.IP
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\f(CW$ sudo sleepgraph -m freeze -rtcwake 15 -multi 10 30\fR
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.PP
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Execute a suspend using a custom command.
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.IP
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\f(CW$ sudo sleepgraph -cmd "echo mem > /sys/power/state" -rtcwake 15\fR
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.PP
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.SS "adding callgraph data"
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Add device callgraphs. Limit the trace depth and only show callgraphs 10ms or larger.
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.IP
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\f(CW$ sudo sleepgraph -m mem -rtcwake 15 -f -maxdepth 5 -mincg 10\fR
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.PP
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Capture a full callgraph across all suspend, then filter the html by a single phase.
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.IP
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\f(CW$ sudo sleepgraph -m mem -rtcwake 15 -f\fR
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.IP
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\f(CW$ sleepgraph -dmesg host_mem_dmesg.txt -ftrace host_mem_ftrace.txt -f -cgphase resume
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.PP
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.SS "rebuild timeline from logs"
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.PP
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Rebuild the html from a previous run's logs, using the same options.
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.IP
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\f(CW$ sleepgraph -dmesg dmesg.txt -ftrace ftrace.txt -callgraph\fR
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.PP
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Rebuild the html with different options.
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.IP
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\f(CW$ sleepgraph -dmesg dmesg.txt -ftrace ftrace.txt -addlogs -srgap\fR
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.SH "SEE ALSO"
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dmesg(1)
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.PP
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.SH AUTHOR
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.nf
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Written by Todd Brandt <todd.e.brandt@linux.intel.com>
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