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MINOR: task: keep a pointer to the currently running task

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Very often when debugging, the current task's pointer isn't easy to
recover (eg: from a core file). Let's keep a copy of it, it will
likely help, especially with threads.
This commit is contained in:
Willy Tarreau 2017-11-26 10:08:06 +01:00
parent 53bae85b8e
commit 6d1222ce73
1 changed files with 6 additions and 0 deletions
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6
src/task.c
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@ -38,6 +38,8 @@ unsigned int tasks_run_queue_cur = 0; /* copy of the run queue size */
unsigned int nb_tasks_cur = 0; /* copy of the tasks count */
unsigned int niced_tasks = 0; /* number of niced tasks in the run queue */
THREAD_LOCAL struct task *curr_task = NULL; /* task currently running or NULL */
__decl_hathreads(HA_SPINLOCK_T rq_lock); /* spin lock related to run queue */
__decl_hathreads(HA_SPINLOCK_T wq_lock); /* spin lock related to wait queue */
@ -217,6 +219,7 @@ void process_runnable_tasks()
t->pending_state = 0;
t->calls++;
curr_task = t;
/* This is an optimisation to help the processor's branch
* predictor take this most common call.
*/
@ -224,6 +227,7 @@ void process_runnable_tasks()
t = process_stream(t);
else
t = t->process(t);
curr_task = NULL;
if (likely(t != NULL)) {
t->state &= ~TASK_RUNNING;
@ -298,10 +302,12 @@ void process_runnable_tasks()
/* This is an optimisation to help the processor's branch
* predictor take this most common call.
*/
curr_task = t;
if (likely(t->process == process_stream))
t = process_stream(t);
else
t = t->process(t);
curr_task = NULL;
if (t)
local_tasks[final_tasks_count++] = t;
}