osfmk/pmc/pmc.c

28 #include <kern/task.h>
218  * Keeps track of all system, task, and thread-level reservations (both active and
221  * We track them all here (rather than in their respective task or thread only)
223  * every task and thread) to determine if/when a new reservation would
702 	 * Since this member is a union, we only need to set either the task
705 	resv->task = TASK_NULL;
743  * Used to place reservation into one of the system, task, and thread queues
768 		if(current_task() == resv->task) {
800  * This method will inspect the task/thread of the reservation to see if it
801  * matches the new incoming one (for thread/task reservations only).  Will only
802  * return TRUE if the task/thread matches.
845 					 * Follow similar semantics for task scope.
849 						(tmp->task == resv->task);
900 		 * If the parent task just dropped its reservation, iterate the thread
925  * given task, and M is the number of thread reservations in our system.
927 static void pmc_internal_update_task_flag(task_t task, boolean_t newFlag) {
928 	assert(task);
932 		OSBitOrAtomic(TASK_PMC_FLAG, &task->t_chud);
934 		OSBitAndAtomic(~(TASK_PMC_FLAG), &task->t_chud);
937 	task_lock(task);
939 	queue_iterate(&task->threads, thread, thread_t, task_threads) {
940 		/* propagate the task's mask down to each thread  */
944 	task_unlock(task);
976 			assert(resv->task);
984 			/* update the task mask, and propagate it to existing threads */
985 			pmc_internal_update_task_flag(resv->task, TRUE);
993 			 * Works the same as a task-switched counter, only at
1089 			/* Recalculate task's counter mask */
1090 			pmc_internal_update_task_flag(resv->task, FALSE);
2400  * configuration object, for counting when the given @task is running on any
2413 	task_t task, pmc_reservation_t *reservation) {
2415 	if(!pmc || !config || !reservation || !task) {
2432 	resv->task = task;
2462  * task scope.
2792  * state associated with @oldThread (and the task to which @oldThread belongs),
2793  * as well as to restore all pmc state associated with @newThread (and the task
2815 			if ((resv->task == oldThread->task) && pmc_accessible_from_core(resv->pmc, cpuNum)) {
2832 			if ((resv->task == newThread->task) && pmc_accessible_from_core(resv->pmc, cpuNum)) {
2921 	pmc_config_t config __unused, task_t task __unused,