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Rodrigo Arias 2022-09-05 20:17:56 +02:00
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37
doc/emulation/events.md
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@ -6,7 +6,7 @@ This file contains an exhaustive list of events supported by the emulator.
- All events refer to the current thread.
- Descriptions must be kept short.
```
```txt
**********************************************************
Please keep this list synchronized with the emulator code!
**********************************************************
@ -141,27 +141,27 @@ KCI Is back in the CPU due to a context switch
6TC Task creation ends
6Tx Task execute
6Te Task end
6Tb Task block
6Tu Task unblock
6Tp Task pause
6Tr Task resume
6Yc Task type create (punctual event)
6S[ Enters the scheduler serving mode
6S] Ends the scheduler serving mode
6Sa Begins to submit a ready task via addReadyTask()
6SA Ends submitting a ready task via addReadyTask()
6Sr Receives a task from another thread (punctual event)
6Ss Sends a task to another thread (punctual event)
6S@ Self-assigns itself a task (punctual event)
6Sh Enters the hungry state, waiting for a task
6Sf Is no longer hungry
6S[ Enters the scheduler server mode
6S] Ends the scheduler server mode
6Su Begins a ready task submission via addReadyTask()
6SU Ends a ready task submission via addReadyTask()
6W[ Begins the worker body loop, looking for tasks
6W] Ends the worker body loop
6Wt Begins handling a task via handleTask()
6WT Ends handling a task via handleTask()
6U[ Starts to submit a task via submitTask()
6U] Ends the submission of a task via submitTask()
6Ha Attaches to Nanos6 as external thread
6HA Detaches from Nanos6 as external thread
6F[ Begins to spawn a function via spawnFunction()
6F] Ends spawning a function
@ -170,12 +170,21 @@ KCI Is back in the CPU due to a context switch
6Du Begins the unregistration of a task's accesses
6DU Ends the unregistration of a task's accesses
6Bu Begins to unblock a task
6BU Ends unblocking a task
6Bb Begins to block the current task via blockCurrentTask()
6BB Ends blocking the current task via blockCurrentTask()
6Bu Begins to unblock a task
6BU Ends unblocking a task
6Bw Enters taskWait()
6BW Exits taskWait()
6Bf Enters taskFor()
6BF Exits taskFor()
6He Sets itself as external thread
6HE Unsets itself as external thread
6Hw Sets itself as worker thread
6HW Unsets itself as worker thread
6Hl Sets itself as leader thread
6HL Unsets itself as leader thread
6Hm Sets itself as main thread
6HM Unsets itself as main thread
```

73
doc/emulation/nanos6.md
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@ -89,59 +89,56 @@ presents that section as the current state of the execution, in this
case the section $`S_3`$.
Additionally, the runtime sections $`S_i`$ are grouped together in
subsystems, which form a closely related group of functions. The
complete list of subsystems and sections is shown below.
subsystems, which form a closely related group of functions. When there is no
instrumented section in the thread stack, the state is set to **No subsystem**.
The complete list of subsystems and sections is shown below.
When there is no instrumented section in the thread stack, the state is
set to **No subsystem**.
- **Task subsystem**: Controls the life cycle of tasks
Task subsystem
: The **Task** subsystem contains the code that controls the life cycle
of tasks. It contains the following sections:
- **Body**: Executing the body of the task (user defined code).
- **Body**: Executing the body of the task (user defined code).
- **Spawning function**: Spawning a function as task that will be submitted
for later execution.
- **Spawning function**: Spawning a function as task (it will be
submitted to the scheduler for later execution).
- **Creating**: Creating a new task via `nanos6_create_task`
- **Creating**: Creating a new task, through `nanos6_create_task`
- **Submitting**: Submitting a recently created task via
`nanos6_submit_task`
- **Submitting**: Submitting a recently created task, through
`nanos6_submit_task`
- **Scheduler subsystem**: Queueing and dequeueing ready tasks.
Scheduler subsystem
: The **Scheduler** system groups the actions that relate to the queueing
and dequeueing of ready tasks. It contains the following sections:
- **Serving tasks**: Inside the scheduler lock, serving tasks
to other threads
- **Waiting for tasks**: Actively waiting for tasks inside the
scheduler subsystem, registered but not holding the scheduler lock
- **Adding ready tasks**: Adding tasks to the scheduler queues,
but outside of the scheduler lock.
- **Serving tasks**: Inside the scheduler lock, serving tasks
to other threads
- **Adding ready tasks**: Adding tasks to the scheduler queues,
but outside of the scheduler lock.
- **Worker subsystem**: Actions that relate to worker threads, which
continuously try to execute new tasks.
Dependency subsystem
: The **Dependency** system only contains the code that manages the
registration of task dependencies. It contains the following sections:
- **Looking for work**: Actively requesting tasks from the scheduler,
registered but not holding the lock.
- **Registering**: Registering a task's dependencies
- **Handling task**: Processing a recently assigned task.
- **Unregistering**: Releasing a task's dependencies because
it has ended
- **Dependency subsystem**: Manages the registration of task
dependencies.
Blocking subsystem
: The **Blocking** subsystem deals with the code stops the thread
execution. It contains the following sections:
- **Registering**: Registering dependencies of a task
- **Taskwait**: Task is blocked while inside a taskwait
- **Unregistering**: Releasing dependencies of a task because
it has ended
- **Blocking current task**: Task is blocked through the Nanos6
blocking API
- **Blocking subsystem**: Code that stops the thread execution.
- **Unblocking remote task**: Unblocking a different task using
the Nanos6 blocking API
- **Taskwait**: Task is blocked due to a `taskwait` clause
- **Wait For**: Blocking a deadline task, which will be
re-enqueued when a certain amount of time has passed
- **Blocking current task**: Task is blocked through the Nanos6
blocking API
- **Unblocking remote task**: Unblocking a different task using the
Nanos6 blocking API
- **Wait for deadline**: Blocking a deadline task, which will be
re-enqueued when a certain amount of time has passed

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