NAME

       bootchart.conf - Boot performance analysis graphing tool configuration file

SYNOPSIS

       /etc/systemd/bootchart.conf

DESCRIPTION

       When starting, systemd-bootchart will read the configuration file bootchart.conf. This
       configuration file determines logging parameters and graph output.

OPTIONS

       Samples=500
           Configure the amount of samples to record 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 folder 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 /sbin/init. 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.

SEE ALSO

       systemd-bootchart(1), systemd.directives(7)