Update documentation
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@ -6,7 +6,7 @@ This file contains an exhaustive list of events supported by the emulator.
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- All events refer to the current thread.
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- All events refer to the current thread.
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- Descriptions must be kept short.
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- Descriptions must be kept short.
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```
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```txt
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**********************************************************
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**********************************************************
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Please keep this list synchronized with the emulator code!
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Please keep this list synchronized with the emulator code!
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**********************************************************
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**********************************************************
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@ -141,27 +141,27 @@ KCI Is back in the CPU due to a context switch
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6TC Task creation ends
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6TC Task creation ends
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6Tx Task execute
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6Tx Task execute
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6Te Task end
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6Te Task end
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6Tb Task block
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6Tp Task pause
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6Tu Task unblock
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6Tr Task resume
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6Yc Task type create (punctual event)
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6Yc Task type create (punctual event)
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6S[ Enters the scheduler serving mode
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6S] Ends the scheduler serving mode
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6Sa Begins to submit a ready task via addReadyTask()
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6SA Ends submitting a ready task via addReadyTask()
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6Sr Receives a task from another thread (punctual event)
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6Sr Receives a task from another thread (punctual event)
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6Ss Sends a task to another thread (punctual event)
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6Ss Sends a task to another thread (punctual event)
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6S@ Self-assigns itself a task (punctual event)
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6S@ Self-assigns itself a task (punctual event)
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6Sh Enters the hungry state, waiting for a task
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6Sf Is no longer hungry
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6W[ Begins the worker body loop, looking for tasks
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6S[ Enters the scheduler server mode
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6W] Ends the worker body loop
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6S] Ends the scheduler server mode
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6Wt Begins handling a task via handleTask()
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6Su Begins a ready task submission via addReadyTask()
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6WT Ends handling a task via handleTask()
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6SU Ends a ready task submission via addReadyTask()
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6U[ Starts to submit a task via submitTask()
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6U[ Starts to submit a task via submitTask()
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6U] Ends the submission of a task via submitTask()
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6U] Ends the submission of a task via submitTask()
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6Ha Attaches to Nanos6 as external thread
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6HA Detaches from Nanos6 as external thread
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6F[ Begins to spawn a function via spawnFunction()
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6F[ Begins to spawn a function via spawnFunction()
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6F] Ends spawning a function
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6F] Ends spawning a function
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@ -170,12 +170,21 @@ KCI Is back in the CPU due to a context switch
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6Du Begins the unregistration of a task's accesses
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6Du Begins the unregistration of a task's accesses
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6DU Ends the unregistration of a task's accesses
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6DU Ends the unregistration of a task's accesses
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6Bu Begins to unblock a task
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6BU Ends unblocking a task
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6Bb Begins to block the current task via blockCurrentTask()
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6Bb Begins to block the current task via blockCurrentTask()
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6BB Ends blocking the current task via blockCurrentTask()
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6BB Ends blocking the current task via blockCurrentTask()
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6Bu Begins to unblock a task
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6BU Ends unblocking a task
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6Bw Enters taskWait()
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6Bw Enters taskWait()
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6BW Exits taskWait()
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6BW Exits taskWait()
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6Bf Enters taskFor()
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6Bf Enters taskFor()
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6BF Exits taskFor()
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6BF Exits taskFor()
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6He Sets itself as external thread
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6HE Unsets itself as external thread
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6Hw Sets itself as worker thread
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6HW Unsets itself as worker thread
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6Hl Sets itself as leader thread
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6HL Unsets itself as leader thread
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6Hm Sets itself as main thread
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6HM Unsets itself as main thread
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```
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```
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@ -89,59 +89,56 @@ presents that section as the current state of the execution, in this
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case the section $`S_3`$.
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case the section $`S_3`$.
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Additionally, the runtime sections $`S_i`$ are grouped together in
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Additionally, the runtime sections $`S_i`$ are grouped together in
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subsystems, which form a closely related group of functions. The
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subsystems, which form a closely related group of functions. When there is no
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complete list of subsystems and sections is shown below.
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instrumented section in the thread stack, the state is set to **No subsystem**.
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The complete list of subsystems and sections is shown below.
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When there is no instrumented section in the thread stack, the state is
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- **Task subsystem**: Controls the life cycle of tasks
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set to **No subsystem**.
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Task subsystem
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- **Body**: Executing the body of the task (user defined code).
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: The **Task** subsystem contains the code that controls the life cycle
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of tasks. It contains the following sections:
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- **Spawning function**: Spawning a function as task that will be submitted
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for later execution.
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- **Creating**: Creating a new task via `nanos6_create_task`
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- **Submitting**: Submitting a recently created task via
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`nanos6_submit_task`
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- **Body**: Executing the body of the task (user defined code).
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- **Scheduler subsystem**: Queueing and dequeueing ready tasks.
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- **Spawning function**: Spawning a function as task (it will be
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- **Serving tasks**: Inside the scheduler lock, serving tasks
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submitted to the scheduler for later execution).
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to other threads
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- **Adding ready tasks**: Adding tasks to the scheduler queues,
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but outside of the scheduler lock.
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- **Creating**: Creating a new task, through `nanos6_create_task`
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- **Submitting**: Submitting a recently created task, through
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- **Worker subsystem**: Actions that relate to worker threads, which
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`nanos6_submit_task`
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continuously try to execute new tasks.
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Scheduler subsystem
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- **Looking for work**: Actively requesting tasks from the scheduler,
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: The **Scheduler** system groups the actions that relate to the queueing
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registered but not holding the lock.
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and dequeueing of ready tasks. It contains the following sections:
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- **Handling task**: Processing a recently assigned task.
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- **Waiting for tasks**: Actively waiting for tasks inside the
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- **Dependency subsystem**: Manages the registration of task
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scheduler subsystem, registered but not holding the scheduler lock
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dependencies.
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- **Serving tasks**: Inside the scheduler lock, serving tasks
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- **Registering**: Registering dependencies of a task
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to other threads
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- **Unregistering**: Releasing dependencies of a task because
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it has ended
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- **Adding ready tasks**: Adding tasks to the scheduler queues,
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- **Blocking subsystem**: Code that stops the thread execution.
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but outside of the scheduler lock.
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Dependency subsystem
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- **Taskwait**: Task is blocked due to a `taskwait` clause
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: The **Dependency** system only contains the code that manages the
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registration of task dependencies. It contains the following sections:
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- **Blocking current task**: Task is blocked through the Nanos6
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blocking API
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- **Registering**: Registering a task's dependencies
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- **Unblocking remote task**: Unblocking a different task using the
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- **Unregistering**: Releasing a task's dependencies because
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Nanos6 blocking API
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it has ended
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- **Wait for deadline**: Blocking a deadline task, which will be
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Blocking subsystem
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re-enqueued when a certain amount of time has passed
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: The **Blocking** subsystem deals with the code stops the thread
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execution. It contains the following sections:
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- **Taskwait**: Task is blocked while inside a taskwait
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- **Blocking current task**: Task is blocked through the Nanos6
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blocking API
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- **Unblocking remote task**: Unblocking a different task using
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the Nanos6 blocking API
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- **Wait For**: Blocking a deadline task, which will be
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re-enqueued when a certain amount of time has passed
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