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

NAME
       bootchart.conf, bootchart.conf.d - Boot performance analysis graphing
       tool configuration files
SYNOPSIS
       /etc/systemd/bootchart.conf
       /etc/systemd/bootchart.conf.d/*.conf
       /run/systemd/bootchart.conf.d/*.conf
       /usr/lib/systemd/bootchart.conf.d/*.conf
DESCRIPTION
       When starting, systemd-bootchart will read the configuration file
       /etc/systemd/bootchart.conf, followed by the files in the
       bootchart.conf.d directories. These configuration files determine
       logging parameters and graph output.
CONFIGURATION DIRECTORIES AND PRECEDENCE
       Default configuration is defined during compilation, so a configuration
       file is only needed when it is necessary to deviate from those
       defaults. By default the configuration file in /etc/systemd/ contains
       commented out entries showing the defaults as a guide to the
       administrator. This file can be edited to create local overrides.
       When packages need to customize the configuration, they can install
       configuration snippets in /usr/lib/systemd/*.conf.d/. Files in /etc/
       are reserved for the local administrator, who may use this logic to
       override the configuration files installed by vendor packages. The main
       configuration file is read before any of the configuration directories,
       and has the lowest precedence; entries in a file in any configuration
       directory override entries in the single configuration file. Files in
       the *.conf.d/ configuration subdirectories are sorted by their filename
       in lexicographic order, regardless of which of the subdirectories they
       reside in. If multiple files specify the same option, the entry in the
       file with the lexicographically latest name takes precedence. It is
       recommended to prefix all filenames in those subdirectories with a
       two-digit number and a dash, to simplify the ordering of the files.
       To disable a configuration file supplied by the vendor, the recommended
       way is to place a symlink to /dev/null in the configuration directory
       in /etc/, with the same filename as the vendor configuration file.
OPTIONS
       Samples=500
           Configure the amount of samples to record in total before bootchart
           exits. Each sample will record at intervals defined by Frequency=.
       Frequency=25
           Configure the sample log frequency. This can be a fractional
           number, but must be larger than 0.0. Most systems can cope with
           values under 25-50 without impacting boot time severely.
       Relative=no
           Configures whether the left axis of the output graph equals
           time=0.0 (CLOCK_MONOTONIC start). This is useful for using
           bootchart at post-boot time to profile an already booted system,
           otherwise the graph would become extremely large. If set to yes,
           the horizontal axis starts at the first recorded sample instead of
           time=0.0.
       Filter=no
           Configures whether the resulting graph should omit tasks that did
           not contribute significantly to the boot. Processes that are too
           short-lived (only seen in one sample) or that do not consume any
           significant CPU time (less than 0.001sec) will not be displayed in
           the output graph.
       Output=[path]
           Configures the output directory for writing the graphs. By default,
           bootchart writes the graphs to /run/log.
       Init=[path]
           Configures bootchart to run a non-standard binary instead of
           /usr/lib/systemd/systemd. This option is only relevant if bootchart
           was invoked from the kernel command line with
           init=/usr/lib/systemd/systemd-bootchart.
       PlotMemoryUsage=no
           If set to yes, enables logging and graphing of processes' PSS
           memory consumption.
       PlotEntropyGraph=no
           If set to yes, enables logging and graphing of the kernel random
           entropy pool size.
       ScaleX=100
           Horizontal scaling factor for all variable graph components.
       ScaleY=20
           Vertical scaling factor for all variable graph components.
       ControlGroup=no
           Display process control group.
SEE ALSO
       systemd-bootchart(1), systemd.directives(7)

systemd 219                                                  BOOTCHART.CONF(5)