35#include <sys/cpuset.h>
36#include <sys/interrupt.h>
37#include <sys/kernel.h>
38#include <sys/kthread.h>
39#include <sys/libkern.h>
40#include <sys/limits.h>
42#include <sys/malloc.h>
48#include <sys/taskqueue.h>
49#include <sys/unistd.h>
50#include <machine/stdarg.h>
71 struct mtx_padalign tq_mutex;
72 taskqueue_enqueue_fn tq_enqueue;
75 struct thread **tq_threads;
79 taskqueue_callback_fn tq_callbacks[TASKQUEUE_NUM_CALLBACKS];
80 void *tq_cb_contexts[TASKQUEUE_NUM_CALLBACKS];
83#define TQ_FLAGS_ACTIVE (1 << 0)
84#define TQ_FLAGS_BLOCKED (1 << 1)
85#define TQ_FLAGS_UNLOCKED_ENQUEUE (1 << 2)
87#define DT_CALLOUT_ARMED (1 << 0)
88#define DT_DRAIN_IN_PROGRESS (1 << 1)
93 mtx_lock_spin(&(tq)->tq_mutex); \
95 mtx_lock(&(tq)->tq_mutex); \
97#define TQ_ASSERT_LOCKED(tq) mtx_assert(&(tq)->tq_mutex, MA_OWNED)
99#define TQ_UNLOCK(tq) \
102 mtx_unlock_spin(&(tq)->tq_mutex); \
104 mtx_unlock(&(tq)->tq_mutex); \
106#define TQ_ASSERT_UNLOCKED(tq) mtx_assert(&(tq)->tq_mutex, MA_NOTOWNED)
110 int priority, task_fn_t func,
void *context)
113 TASK_INIT(&timeout_task->t,
priority, func, context);
114 callout_init_mtx(&timeout_task->c, &queue->tq_mutex,
115 CALLOUT_RETURNUNLOCKED);
116 timeout_task->q = queue;
124 return (msleep_spin(p, (
struct mtx *)&tq->tq_mutex, wm, 0));
125 return (msleep(p, &tq->tq_mutex, 0, wm, 0));
130 taskqueue_enqueue_fn enqueue,
void *context,
131 int mtxflags,
const char *mtxname __unused)
136 tq_name =
malloc(TASKQUEUE_NAMELEN, M_TASKQUEUE, mflags | M_ZERO);
140 queue =
malloc(
sizeof(
struct taskqueue), M_TASKQUEUE, mflags | M_ZERO);
142 free(tq_name, M_TASKQUEUE);
148 STAILQ_INIT(&queue->tq_queue);
149 LIST_INIT(&queue->tq_active);
150 queue->tq_enqueue = enqueue;
151 queue->tq_context = context;
152 queue->tq_name = tq_name;
153 queue->tq_spin = (mtxflags & MTX_SPIN) != 0;
160 mtx_init(&queue->tq_mutex, tq_name, NULL, mtxflags);
167 taskqueue_enqueue_fn enqueue,
void *context)
176 enum taskqueue_callback_type cb_type, taskqueue_callback_fn
callback,
180 KASSERT(((cb_type >= TASKQUEUE_CALLBACK_TYPE_MIN) &&
181 (cb_type <= TASKQUEUE_CALLBACK_TYPE_MAX)),
182 (
"Callback type %d not valid, must be %d-%d", cb_type,
183 TASKQUEUE_CALLBACK_TYPE_MIN, TASKQUEUE_CALLBACK_TYPE_MAX));
184 KASSERT((queue->tq_callbacks[cb_type] == NULL),
185 (
"Re-initialization of taskqueue callback?"));
187 queue->tq_callbacks[cb_type] =
callback;
188 queue->tq_cb_contexts[cb_type] = context;
198 while (tq->tq_tcount > 0 || tq->tq_callouts > 0) {
209 queue->tq_flags &= ~TQ_FLAGS_ACTIVE;
211 KASSERT(LIST_EMPTY(&queue->tq_active), (
"Tasks still running?"));
212 KASSERT(queue->tq_callouts == 0, (
"Armed timeout tasks"));
213 mtx_destroy(&queue->tq_mutex);
214 free(queue->tq_threads, M_TASKQUEUE);
215 free(queue->tq_name, M_TASKQUEUE);
216 free(queue, M_TASKQUEUE);
225 KASSERT(task->ta_func != NULL, (
"enqueueing task with NULL func"));
229 if (task->ta_pending) {
230 if (task->ta_pending < USHRT_MAX)
242 prev = STAILQ_LAST(&queue->tq_queue, task, ta_link);
243 if (!prev || prev->ta_priority >= task->ta_priority) {
244 STAILQ_INSERT_TAIL(&queue->tq_queue, task, ta_link);
246 prev = queue->tq_hint;
247 if (prev && prev->ta_priority >= task->ta_priority) {
248 ins = STAILQ_NEXT(prev, ta_link);
251 ins = STAILQ_FIRST(&queue->tq_queue);
253 for (; ins; prev = ins, ins = STAILQ_NEXT(ins, ta_link))
254 if (ins->ta_priority < task->ta_priority)
258 STAILQ_INSERT_AFTER(&queue->tq_queue, prev, task, ta_link);
259 queue->tq_hint = task;
261 STAILQ_INSERT_HEAD(&queue->tq_queue, task, ta_link);
264 task->ta_pending = 1;
268 queue->tq_enqueue(queue->tq_context);
292 struct timeout_task *timeout_task;
295 queue = timeout_task->q;
297 timeout_task->f &= ~DT_CALLOUT_ARMED;
298 queue->tq_callouts--;
305 struct timeout_task *timeout_task, sbintime_t sbt, sbintime_t
pr,
int flags)
310 KASSERT(timeout_task->q == NULL || timeout_task->q == queue,
312 timeout_task->q = queue;
313 res = timeout_task->t.ta_pending;
318 }
else if (sbt == 0) {
325 queue->tq_callouts++;
332 flags |= C_DIRECT_EXEC;
333 callout_reset_sbt(&timeout_task->c, sbt,
pr,
343 struct timeout_task *ttask,
int ticks)
363 struct task t_barrier;
365 if (STAILQ_EMPTY(&queue->tq_queue))
377 STAILQ_INSERT_TAIL(&queue->tq_queue, &t_barrier, ta_link);
378 queue->tq_hint = &t_barrier;
379 t_barrier.ta_pending = 1;
385 while (t_barrier.ta_pending != 0)
386 TQ_SLEEP(queue, &t_barrier,
"tq_qdrain");
401 if (LIST_EMPTY(&queue->tq_active))
405 queue->tq_callouts++;
410 LIST_FOREACH(tb, &queue->tq_active, tb_link) {
411 if ((
int)(tb->
tb_seq - seq) <= 0) {
418 queue->tq_callouts--;
438 queue->tq_flags &= ~TQ_FLAGS_BLOCKED;
439 if (!STAILQ_EMPTY(&queue->tq_queue))
440 queue->tq_enqueue(queue->tq_context);
447 struct epoch_tracker et;
453 KASSERT(queue != NULL, (
"tq is NULL"));
456 LIST_INSERT_HEAD(&queue->tq_active, &tb, tb_link);
457 in_net_epoch =
false;
459 while ((task = STAILQ_FIRST(&queue->tq_queue)) != NULL) {
460 STAILQ_REMOVE_HEAD(&queue->tq_queue, ta_link);
461 if (queue->tq_hint == task)
462 queue->tq_hint = NULL;
463 pending = task->ta_pending;
464 task->ta_pending = 0;
466 tb.
tb_seq = ++queue->tq_seq;
469 KASSERT(task->ta_func != NULL, (
"task->ta_func is NULL"));
470 if (!in_net_epoch && TASK_IS_NET(task)) {
473 }
else if (in_net_epoch && !TASK_IS_NET(task)) {
475 in_net_epoch =
false;
477 task->ta_func(task->ta_context, pending);
484 LIST_REMOVE(&tb, tb_link);
502 LIST_FOREACH(tb, &queue->tq_active, tb_link) {
531 if (task->ta_pending > 0) {
532 STAILQ_REMOVE(&queue->tq_queue, task, task, ta_link);
533 if (queue->tq_hint == task)
534 queue->tq_hint = NULL;
537 *pendp = task->ta_pending;
538 task->ta_pending = 0;
556 struct timeout_task *timeout_task, u_int *pendp)
558 u_int pending, pending1;
562 pending = !!(callout_stop(&timeout_task->c) > 0);
565 timeout_task->f &= ~DT_CALLOUT_ARMED;
566 queue->tq_callouts--;
571 *pendp = pending + pending1;
580 WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, NULL, __func__);
593 WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, NULL, __func__);
603 struct timeout_task *timeout_task)
611 (
"Drain already in progress"));
615 callout_drain(&timeout_task->c);
622 timeout_task->f &= ~DT_DRAIN_IN_PROGRESS;
666 cpuset_t *
mask,
struct proc *p,
const char *
name, va_list ap)
668 char ktname[MAXCOMLEN + 1];
679 tq->tq_threads =
malloc(
sizeof(
struct thread *) *
count, M_TASKQUEUE,
681 if (tq->tq_threads == NULL) {
682 printf(
"%s: no memory for %s threads\n", __func__, ktname);
686 for (i = 0; i <
count; i++) {
689 &tq->tq_threads[i], RFSTOPPED, 0,
"%s", ktname);
692 &tq->tq_threads[i], RFSTOPPED, 0,
696 printf(
"%s: kthread_add(%s): error %d", __func__,
698 tq->tq_threads[i] = NULL;
702 if (tq->tq_tcount == 0) {
703 free(tq->tq_threads, M_TASKQUEUE);
704 tq->tq_threads = NULL;
707 for (i = 0; i <
count; i++) {
708 if (tq->tq_threads[i] == NULL)
710 td = tq->tq_threads[i];
718 printf(
"%s: curthread=%llu: can't pin; "
721 (
unsigned long long) td->td_tid,
734 const char *
name, ...)
747 struct proc *proc,
const char *
name, ...)
760 cpuset_t *
mask,
const char *
name, ...)
773 enum taskqueue_callback_type cb_type)
775 taskqueue_callback_fn tq_callback;
778 tq_callback = tq->tq_callbacks[cb_type];
779 if (tq_callback != NULL)
780 tq_callback(tq->tq_cb_contexts[cb_type]);
843 taskqueue_enqueue_fn enqueue,
void *context)
846 MTX_SPIN,
"fast_taskqueue");
872 for (i = 0, j = 0; ; i++) {
873 if (queue->tq_threads[i] == NULL)
875 if (queue->tq_threads[i] == td) {
879 if (++j >= queue->tq_tcount)
static STAILQ_HEAD(cn_device)
int cpuset_setthread(lwpid_t id, cpuset_t *mask)
int swi_add(struct intr_event **eventp, const char *name, driver_intr_t handler, void *arg, int pri, enum intr_type flags, void **cookiep)
void swi_sched(void *cookie, int flags)
int kthread_add(void(*func)(void *), void *arg, struct proc *p, struct thread **newtdp, int flags, int pages, const char *fmt,...)
void *() malloc(size_t size, struct malloc_type *mtp, int flags)
void free(void *addr, struct malloc_type *mtp)
static struct pollrec pr[POLL_LIST_LEN]
void wakeup_any(const void *ident)
void wakeup(const void *ident)
void wakeup_one(const void *ident)
linker_function_name_callback_t callback
void sched_prio(struct thread *td, u_char prio)
void sched_add(struct thread *td, int flags)
int vsnprintf(char *str, size_t size, const char *format, va_list ap)
int printf(const char *fmt,...)
int snprintf(char *str, size_t size, const char *format,...)
void taskqueue_drain_timeout(struct taskqueue *queue, struct timeout_task *timeout_task)
int taskqueue_enqueue(struct taskqueue *queue, struct task *task)
int taskqueue_enqueue_timeout_sbt(struct taskqueue *queue, struct timeout_task *timeout_task, sbintime_t sbt, sbintime_t pr, int flags)
TASKQUEUE_DEFINE_THREAD(thread)
#define TQ_ASSERT_LOCKED(tq)
static struct taskqueue * _taskqueue_create(const char *name, int mflags, taskqueue_enqueue_fn enqueue, void *context, int mtxflags, const char *mtxname __unused)
int taskqueue_start_threads(struct taskqueue **tqp, int count, int pri, const char *name,...)
int taskqueue_cancel_timeout(struct taskqueue *queue, struct timeout_task *timeout_task, u_int *pendp)
int taskqueue_start_threads_in_proc(struct taskqueue **tqp, int count, int pri, struct proc *proc, const char *name,...)
struct taskqueue * taskqueue_create(const char *name, int mflags, taskqueue_enqueue_fn enqueue, void *context)
static MALLOC_DEFINE(M_TASKQUEUE, "taskqueue", "Task Queues")
static void taskqueue_fast_enqueue(void *)
static int taskqueue_enqueue_locked(struct taskqueue *queue, struct task *task)
static int taskqueue_drain_tq_active(struct taskqueue *queue)
void taskqueue_quiesce(struct taskqueue *queue)
static int task_is_running(struct taskqueue *queue, struct task *task)
void taskqueue_free(struct taskqueue *queue)
static int _taskqueue_start_threads(struct taskqueue **tqp, int count, int pri, cpuset_t *mask, struct proc *p, const char *name, va_list ap)
void taskqueue_thread_loop(void *arg)
#define TQ_ASSERT_UNLOCKED(tq)
TASKQUEUE_FAST_DEFINE(fast, taskqueue_fast_enqueue, NULL, swi_add(NULL, "fast taskq", taskqueue_fast_run, NULL, SWI_TQ_FAST, INTR_MPSAFE, &taskqueue_fast_ih))
void taskqueue_run(struct taskqueue *queue)
static int taskqueue_drain_tq_queue(struct taskqueue *queue)
void taskqueue_drain(struct taskqueue *queue, struct task *task)
struct taskqueue * taskqueue_create_fast(const char *name, int mflags, taskqueue_enqueue_fn enqueue, void *context)
static __inline int TQ_SLEEP(struct taskqueue *tq, void *p, const char *wm)
void taskqueue_thread_enqueue(void *context)
static void taskqueue_swi_enqueue(void *)
static void taskqueue_swi_giant_run(void *dummy)
void taskqueue_block(struct taskqueue *queue)
static void taskqueue_timeout_func(void *arg)
int taskqueue_start_threads_cpuset(struct taskqueue **tqp, int count, int pri, cpuset_t *mask, const char *name,...)
int taskqueue_member(struct taskqueue *queue, struct thread *td)
#define TQ_FLAGS_UNLOCKED_ENQUEUE
static void taskqueue_run_callback(struct taskqueue *tq, enum taskqueue_callback_type cb_type)
void _timeout_task_init(struct taskqueue *queue, struct timeout_task *timeout_task, int priority, task_fn_t func, void *context)
static void taskqueue_swi_giant_enqueue(void *)
void taskqueue_set_callback(struct taskqueue *queue, enum taskqueue_callback_type cb_type, taskqueue_callback_fn callback, void *context)
void taskqueue_drain_all(struct taskqueue *queue)
int taskqueue_poll_is_busy(struct taskqueue *queue, struct task *task)
static void taskqueue_terminate(struct thread **pp, struct taskqueue *tq)
static void * taskqueue_fast_ih
static void * taskqueue_ih
static void taskqueue_run_locked(struct taskqueue *queue)
TASKQUEUE_DEFINE(swi, taskqueue_swi_enqueue, NULL, swi_add(NULL, "task queue", taskqueue_swi_run, NULL, SWI_TQ, INTR_MPSAFE, &taskqueue_ih))
void taskqueue_unblock(struct taskqueue *queue)
static void taskqueue_task_nop_fn(void *context, int pending)
int taskqueue_enqueue_timeout(struct taskqueue *queue, struct timeout_task *ttask, int ticks)
int taskqueue_cancel(struct taskqueue *queue, struct task *task, u_int *pendp)
static void * taskqueue_giant_ih
static void taskqueue_swi_run(void *dummy)
static void taskqueue_fast_run(void *dummy)
static int taskqueue_cancel_locked(struct taskqueue *queue, struct task *task, u_int *pendp)
#define DT_DRAIN_IN_PROGRESS