1BOOTCHART.CONF(5)               bootchart.conf               BOOTCHART.CONF(5)
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NAME

6       bootchart.conf, bootchart.conf.d - Boot performance analysis graphing
7       tool configuration files
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SYNOPSIS

10       /etc/systemd/bootchart.conf
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12       /etc/systemd/bootchart.conf.d/*.conf
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14       /run/systemd/bootchart.conf.d/*.conf
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16       /usr/lib/systemd/bootchart.conf.d/*.conf
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DESCRIPTION

19       When starting, systemd-bootchart will read the configuration file
20       /etc/systemd/bootchart.conf, followed by the files in the
21       bootchart.conf.d directories. These configuration files determine
22       logging parameters and graph output.
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CONFIGURATION DIRECTORIES AND PRECEDENCE

25       Default configuration is defined during compilation, so a configuration
26       file is only needed when it is necessary to deviate from those
27       defaults. By default the configuration file in /etc/systemd/ contains
28       commented out entries showing the defaults as a guide to the
29       administrator. This file can be edited to create local overrides.
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31       When packages need to customize the configuration, they can install
32       configuration snippets in /usr/lib/systemd/*.conf.d/. Files in /etc/
33       are reserved for the local administrator, who may use this logic to
34       override the configuration files installed by vendor packages. The main
35       configuration file is read before any of the configuration directories,
36       and has the lowest precedence; entries in a file in any configuration
37       directory override entries in the single configuration file. Files in
38       the *.conf.d/ configuration subdirectories are sorted by their filename
39       in lexicographic order, regardless of which of the subdirectories they
40       reside in. If multiple files specify the same option, the entry in the
41       file with the lexicographically latest name takes precedence. It is
42       recommended to prefix all filenames in those subdirectories with a
43       two-digit number and a dash, to simplify the ordering of the files.
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45       To disable a configuration file supplied by the vendor, the recommended
46       way is to place a symlink to /dev/null in the configuration directory
47       in /etc/, with the same filename as the vendor configuration file.
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OPTIONS

50       Samples=500
51           Configure the amount of samples to record in total before bootchart
52           exits. Each sample will record at intervals defined by Frequency=.
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54       Frequency=25
55           Configure the sample log frequency. This can be a fractional
56           number, but must be larger than 0.0. Most systems can cope with
57           values under 25-50 without impacting boot time severely.
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59       Relative=no
60           Configures whether the left axis of the output graph equals
61           time=0.0 (CLOCK_MONOTONIC start). This is useful for using
62           bootchart at post-boot time to profile an already booted system,
63           otherwise the graph would become extremely large. If set to yes,
64           the horizontal axis starts at the first recorded sample instead of
65           time=0.0.
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67       Filter=no
68           Configures whether the resulting graph should omit tasks that did
69           not contribute significantly to the boot. Processes that are too
70           short-lived (only seen in one sample) or that do not consume any
71           significant CPU time (less than 0.001sec) will not be displayed in
72           the output graph.
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74       Output=[path]
75           Configures the output directory for writing the graphs. By default,
76           bootchart writes the graphs to /run/log.
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78       Init=[path]
79           Configures bootchart to run a non-standard binary instead of
80           /usr/lib/systemd/systemd. This option is only relevant if bootchart
81           was invoked from the kernel command line with
82           init=/usr/lib/systemd/systemd-bootchart.
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84       PlotMemoryUsage=no
85           If set to yes, enables logging and graphing of processes' PSS
86           memory consumption.
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88       PlotEntropyGraph=no
89           If set to yes, enables logging and graphing of the kernel random
90           entropy pool size.
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92       ScaleX=100
93           Horizontal scaling factor for all variable graph components.
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95       ScaleY=20
96           Vertical scaling factor for all variable graph components.
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98       ControlGroup=no
99           Display process control group.
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SEE ALSO

102       systemd-bootchart(1), systemd.directives(7)
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106systemd 219                                                  BOOTCHART.CONF(5)
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