The System Monitor is a system for displaying the vital signs of a Fuchsia device and its processes. Samples are collected for global and per-process CPU, memory usage, and process list which are relayed to the Host computer for display.
The main components of the System Monitor execute as separate processes (either on the Host computer or the Fuchsia device).
There are several components of the System Monitor
At the highest level, the GUI displays samples collected from the Fuchsia device (in graphs or charts as appropriate), which come from the Dockyard on the Host. The GUI for the System Monitor is not included in this source directory. It is implemented at a higher level (or petal).
The Dockyard is used as a library (with no GUI itself) that collects data from the Fuchsia device through the transport system. It responds to requests from the GUI for digestible (i.e. small) sections of data that will be presented to the user.
The Harvester runs on the Fuchsia device, acquiring Samples (units of introspection data) that it sends to the Host using the Transport system. The Harvester does not store samples.
The communication between the Harvester and the Dockyard is handled by the Transport which will run on both the Host machine and the Fuchsia device.