Bootchartd

Pantavisor supports bootchartd for boot time profiling. When enabled, Pantavisor generates a bootchartd.tgz tarball capturing the boot sequence.

Enable

Add bootchartd to PANTAVISOR_FEATURES in your distro config or recipe:

PANTAVISOR_FEATURES:append = " bootchartd"

This enables the following Busybox options:

• CONFIG_TAR
• CONFIG_FEATURE_TAR_CREATE
• CONFIG_BOOTCHARTD

Pantavisor-specific patch

Bootchartd normally writes data to /tmp and /var/log, which are not available in the Pantavisor initramfs. The meta-pantavisor layer includes a patch redirecting all output to the root directory / instead.

Usage

Boot with rdinit=/sbin/bootchartd to generate the tarball:

# In your bootloader or kernel cmdline:
rdinit=/sbin/bootchartd

The resulting bootchartd.tgz can be analysed with standard bootchart tools.