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fix formatting and typos

Olivier Aumage 6 years ago
parent
commit
e0886365b7
1 changed files with 41 additions and 40 deletions
  1. 41 40
      doc/doxygen_dev/chapters/010_core.doxy

+ 41 - 40
doc/doxygen_dev/chapters/010_core.doxy

@@ -73,7 +73,7 @@ participate to computation.
 
 While a worker is conducting a scheduling operations, e.g. the worker is in the
 process of selecting a new task to execute, flag state_sched_op_pending is set
-to !0, otherwise it is set to 0.
+to \c !0, otherwise it is set to \c 0.
 
 While state_sched_op_pending is !0, the following exhaustive list of operations on that
 workers are restricted in the stated way:
@@ -83,29 +83,29 @@ workers are restricted in the stated way:
 - adding the worker to a parallel task team is not allowed;
 - removing the worker from a parallel task team is not allowed;
 - querying state information about the worker is only allowed while
-  state_relax_refcnt > 0;
+  <code>state_relax_refcnt > 0</code>;
   - in particular, querying whether the worker is blocked on a parallel team entry is only
-  allowed while state_relax_refcnt > 0.
+  allowed while <code>state_relax_refcnt > 0</code>.
 
 Entering and leaving the state_sched_op_pending state is done through calls to
-_starpu_worker_enter_sched_op() and _starpu_worker_leave_sched_op()
-respectively (see these functions in use in functions _starpu_get_worker_task() and
-_starpu_get_multi_worker_task()). These calls ensure that any pending
+\ref _starpu_worker_enter_sched_op() and \ref _starpu_worker_leave_sched_op()
+respectively (see these functions in use in functions \ref _starpu_get_worker_task() and
+\ref _starpu_get_multi_worker_task()). These calls ensure that any pending
 conflicting operation deferred while the worker was in the
 state_sched_op_pending state is performed in an orderly manner.
 
 <br>
 <b>Scheduling contexts related states</b>
 
-Flag state_changing_ctx_notice is set to !0 when a thread is about to
-add to a scheduling context or remove it from a scheduling context, and is
-currently waiting for a safe window to do, until the targeted worker is not in a
-scheduling operation or parallel task operation anymore. This flag set to !0 will also
+Flag \c state_changing_ctx_notice is set to \c !0 when a thread is about to
+add the worker to a scheduling context or remove it from a scheduling context, and is
+currently waiting for a safe window to do so, until the targeted worker is not in a
+scheduling operation or parallel task operation anymore. This flag set to \c !0 will also
 prevent the targeted worker to attempt a fresh scheduling operation or parallel
 task operation to avoid starving conditions. However, a scheduling operation
-that was already in process before the notice is allowed to complete.
+that was already in progress before the notice is allowed to complete.
 
-Flag state_changing_ctx_waiting is set to !0 when a scheduling context worker
+Flag \c state_changing_ctx_waiting is set to \c !0 when a scheduling context worker
 addition or removal involving the targeted worker is about to occur and the
 worker is currently performing a scheduling operation to tell the targeted
 worker that the initiator thread is waiting for the scheduling operation to
@@ -118,18 +118,18 @@ Any StarPU worker may participate to scheduling operations, and in this process,
 may be forced to observe state information from other workers. 
 A StarPU worker thread may therefore be observed by any thread, even
 other StarPU workers. Since workers may observe each other in any order, it is
-not possible to rely exclusively on the sched_mutex of each worker to protect the
+not possible to rely exclusively on the \c sched_mutex of each worker to protect the
 observation of worker state flags by other workers, because
 worker A observing worker B would involve locking workers in (A B) sequence,
 while worker B observing worker A would involve locking workers in (B A)
 sequence, leading to lock inversion deadlocks.
 
 In consequence, no thread must hold more than one worker's sched_mutex at any time.
-Instead, workers implement a relaxed locking scheme based on the state_relax_refcnt
-counter, itself protected by the worker's sched_mutex. When state_relax_refcnt
-> 0, the targeted worker state flags may be observed, otherwise the thread attempting
-the observation must repeatedly wait on the targeted worker's sched_cond
-condition until state_relax_refcnt > 0.
+Instead, workers implement a relaxed locking scheme based on the \c state_relax_refcnt
+counter, itself protected by the worker's sched_mutex. When <code>state_relax_refcnt
+> 0</code>, the targeted worker state flags may be observed, otherwise the thread attempting
+the observation must repeatedly wait on the targeted worker's \c sched_cond
+condition until <code>state_relax_refcnt > 0</code>.
 
 The relaxed mode, while on, can actually be seen as a transactional consistency
 model, where concurrent accesses are authorized and potential conflicts are
@@ -147,58 +147,59 @@ available to run other tasks or perform other operations. Such a waiting
 operation can therefore not start while conflicting operations such as
 scheduling operations and scheduling context resizing involving the worker are
 on-going. Conversely these operations and other may query weather the worker is
-blocked on a parallel task entry with starpu_worker_is_blocked_in_parallel().
+blocked on a parallel task entry with \ref starpu_worker_is_blocked_in_parallel().
 
-The starpu_worker_is_blocked_in_parallel() function is allowed to proceed while
-and only while state_relax_refcnt > 0. Due to the relaxed worker locking scheme,
-the state_blocked_in_parallel flag of the targeted worker may change after it
+The \ref starpu_worker_is_blocked_in_parallel() function is allowed to proceed while
+and only while <code>state_relax_refcnt > 0</code>. Due to the relaxed worker locking scheme,
+the \c state_blocked_in_parallel flag of the targeted worker may change after it
 has been observed by an observer thread. In consequence, flag
-state_blocked_in_parallel_observed of the targeted worker is set to 1 by the
+\c state_blocked_in_parallel_observed of the targeted worker is set to \c 1 by the
 observer immediately after the observation to "taint" the targeted worker. The
-targeted worker will clear the state_blocked_in_parallel_observed flag tainting
+targeted worker will clear the \c state_blocked_in_parallel_observed flag tainting
 and defer the processing of parallel task related requests until a full
 scheduling operation shot completes without the
-state_blocked_in_parallel_observed flag being tainted again. The purpose of this
+\c state_blocked_in_parallel_observed flag being tainted again. The purpose of this
 tainting flag is to prevent parallel task operations to be started immediately
 after the observation of a transient scheduling state.
 
 Worker's management of parallel tasks is
 governed by the following set of state flags and counters:
 
-- state_blocked_in_parallel: set to !0 while the worker is currently blocked on a parallel
+- \c state_blocked_in_parallel: set to \c !0 while the worker is currently blocked on a parallel
   task;
-- state_blocked_in_parallel_observed: set to !0 to taint the worker when a
+
+- \c state_blocked_in_parallel_observed: set to \c !0 to taint the worker when a
   thread has observed the state_blocked_in_parallel flag of this worker while
-  its state_relax_refcnt state counter was >0. Any pending request to add or
+  its \c state_relax_refcnt state counter was \c >0. Any pending request to add or
   remove the worker from a parallel task team will be deferred until a whole
   scheduling operation shot completes without being tainted again.
 
-- state_block_in_parallel_req: set to !0 when a thread is waiting on a request
+- \c state_block_in_parallel_req: set to \c !0 when a thread is waiting on a request
   for the worker to be added to a parallel task team. Must be protected by the
-  worker's sched_mutex.
+  worker's \c sched_mutex.
 
-- state_block_in_parallel_ack: set to !0 by the worker when acknowledging a
+- \c state_block_in_parallel_ack: set to \c !0 by the worker when acknowledging a
   request for being added to a parallel task team. Must be protected by the
-  worker's sched_mutex.
+  worker's \c sched_mutex.
 
 
-- state_unblock_in_parallel_req: set to !0 when a thread is waiting on a request
+- \c state_unblock_in_parallel_req: set to \c !0 when a thread is waiting on a request
   for the worker to be removed from a parallel task team. Must be protected by the
-  worker's sched_mutex.
+  worker's \c sched_mutex.
 
 
-- state_unblock_in_parallel_ack: set to !0 by the worker when acknowledging a
+- \c state_unblock_in_parallel_ack: set to \c !0 by the worker when acknowledging a
   request for being removed from a parallel task team. Must be protected by the
-  worker's sched_mutex.
+  worker's \c sched_mutex.
 
 
-- block_in_parallel_ref_count: counts the number of consecutive pending requests
+- \c block_in_parallel_ref_count: counts the number of consecutive pending requests
   to enter parallel task teams. Only the first of a train of requests for
   entering parallel task teams triggers the transition of the
-  state_block_in_parallel_req flag from 0 to 1. Only the last of a train of
+  \c state_block_in_parallel_req flag from \c 0 to \c 1. Only the last of a train of
   requests to leave a parallel task team triggers the transition of flag
-  state_unblock_in_parallel_req from 0 to 1. Must be protected by the
-  worker's sched_mutex.
+  \c state_unblock_in_parallel_req from \c 0 to \c 1. Must be protected by the
+  worker's \c sched_mutex.
 
 
 \subsubsection CoreEntitiesWorkersOperations Operations