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authorChad Smith <chad.smith@canonical.com>2017-08-21 13:46:23 -0600
committerChad Smith <chad.smith@canonical.com>2017-08-21 13:46:23 -0600
commite74d7752f1761c3a8d3c19877de4707d00c49d08 (patch)
tree0627dd5d06d83b770b38196bceabddd06c0b1b77 /upstart
parentdc2bd79949492bccdc1d7df0132f98c354d51943 (diff)
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tools: Add tooling for basic cloud-init performance analysis.
This branch adds cloudinit-analyze into cloud-init proper. It adds an "analyze" subcommand to the cloud-init command line utility for quick performance assessment of cloud-init stages and events. On a cloud-init configured instance, running "cloud-init analyze blame" will now report which cloud-init events cost the most wall time. This allows for quick assessment of the most costly stages of cloud-init. This functionality is pulled from Ryan Harper's analyze work. The cloudinit-analyze main script itself has been refactored a bit for inclusion as a subcommand of cloud-init CLI. There will be a followup branch at some point which will optionally instrument detailed strace profiling, but that approach needs a bit more discussion first. This branch also adds: * additional debugging topic to the sphinx-generated docs describing cloud-init analyze, dump and show as well as cloud-init single usage. * Updates the Makefile unittests target to include cloudinit directory because we now have unittests within that package. LP: #1709761
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