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nOS-V model
The nOS-V runtime is composed of tasks that can be scheduled to run in threads. Tasks can be paused and resumed, leaving the CPUs free to execute other tasks. The nOS-V model tracks the state of each task as well as the state of the runtime internal state.
Task type colors
In the Paraver timeline, the color assigned to each nOS-V task type is computed from the task type label using a hash function; the task type id doesn't affect in any way how the color gets assigned. This method provides two desirable properties:
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Invariant type colors over time: the order in which task types are created doesn't affect their color.
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Deterministic colors among threads: task types with the same label end up mapped to the same color, even if they are from different threads located in different nodes.
For more details, see this MR.