Differential D12235 Diff 32993 sys/kern/subr_gtaskqueue.c

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sys/kern/subr_gtaskqueue.c

Show First 20 Lines • Show All 42 Lines • ▼ Show 20 Lines
#include <sys/mutex.h>		#include <sys/mutex.h>
#include <sys/proc.h>		#include <sys/proc.h>
#include <sys/sched.h>		#include <sys/sched.h>
#include <sys/smp.h>		#include <sys/smp.h>
#include <sys/gtaskqueue.h>		#include <sys/gtaskqueue.h>
#include <sys/unistd.h>		#include <sys/unistd.h>
#include <machine/stdarg.h>		#include <machine/stdarg.h>

static MALLOC_DEFINE(M_GTASKQUEUE, "taskqueue", "Task Queues");		static MALLOC_DEFINE(M_GTASKQUEUE, "gtaskqueue", "Group Task Queues");
static void gtaskqueue_thread_enqueue(void *);		static void gtaskqueue_thread_enqueue(void *);
static void gtaskqueue_thread_loop(void *arg);		static void gtaskqueue_thread_loop(void *arg);
		static int _taskqgroup_adjust(struct taskqgroup *qgroup, int cnt, int stride, bool ithread, int pri);
		TASKQGROUP_DEFINE(softirq, mp_ncpus, 1, false, PI_SOFT);

TASKQGROUP_DEFINE(softirq, mp_ncpus, 1);

struct gtaskqueue_busy {		struct gtaskqueue_busy {
struct gtask *tb_running;		struct gtask *tb_running;
TAILQ_ENTRY(gtaskqueue_busy) tb_link;		TAILQ_ENTRY(gtaskqueue_busy) tb_link;
};		};

		struct gt_intr_thread {
		int git_flags; /* (j) IT_* flags. */
		int git_need; /* Needs service. */
		};

		/* Interrupt thread flags kept in it_flags */
		#define IT_DEAD 0x000001 /* Thread is waiting to exit. */
		#define IT_WAIT 0x000002 /* Thread is waiting for completion. */

static struct gtask * const TB_DRAIN_WAITER = (struct gtask *)0x1;		static struct gtask * const TB_DRAIN_WAITER = (struct gtask *)0x1;

struct gtaskqueue {		struct gtaskqueue {
STAILQ_HEAD(, gtask) tq_queue;		STAILQ_HEAD(, gtask) tq_queue;
gtaskqueue_enqueue_fn tq_enqueue;		gtaskqueue_enqueue_fn tq_enqueue;
void *tq_context;		void *tq_context;
char *tq_name;		char *tq_name;
TAILQ_HEAD(, gtaskqueue_busy) tq_active;		TAILQ_HEAD(, gtaskqueue_busy) tq_active;
struct mtx tq_mutex;		struct mtx tq_mutex;
struct thread **tq_threads;		struct thread **tq_threads;
		struct gt_intr_thread *tq_gt_intrs;
int tq_tcount;		int tq_tcount;
int tq_spin;		int tq_spin;
int tq_flags;		int tq_flags;
int tq_callouts;		int tq_callouts;
taskqueue_callback_fn tq_callbacks[TASKQUEUE_NUM_CALLBACKS];		taskqueue_callback_fn tq_callbacks[TASKQUEUE_NUM_CALLBACKS];
void *tq_cb_contexts[TASKQUEUE_NUM_CALLBACKS];		void *tq_cb_contexts[TASKQUEUE_NUM_CALLBACKS];
};		};

#define TQ_FLAGS_ACTIVE (1 << 0)		#define TQ_FLAGS_ACTIVE (1 << 0)
#define TQ_FLAGS_BLOCKED (1 << 1)		#define TQ_FLAGS_BLOCKED (1 << 1)
#define TQ_FLAGS_UNLOCKED_ENQUEUE (1 << 2)		#define TQ_FLAGS_UNLOCKED_ENQUEUE (1 << 2)
		#define TQ_FLAGS_INTR (1 << 3)

#define DT_CALLOUT_ARMED (1 << 0)		#define DT_CALLOUT_ARMED (1 << 0)

#define TQ_LOCK(tq) \		#define TQ_LOCK(tq) \
do { \		do { \
if ((tq)->tq_spin) \		if ((tq)->tq_spin) \
mtx_lock_spin(&(tq)->tq_mutex); \		mtx_lock_spin(&(tq)->tq_mutex); \
else \		else \
▲ Show 20 Lines • Show All 84 Lines • ▼ Show 20 Lines	gtaskqueue_free(struct gtaskqueue *queue)
KASSERT(TAILQ_EMPTY(&queue->tq_active), ("Tasks still running?"));		KASSERT(TAILQ_EMPTY(&queue->tq_active), ("Tasks still running?"));
KASSERT(queue->tq_callouts == 0, ("Armed timeout tasks"));		KASSERT(queue->tq_callouts == 0, ("Armed timeout tasks"));
mtx_destroy(&queue->tq_mutex);		mtx_destroy(&queue->tq_mutex);
free(queue->tq_threads, M_GTASKQUEUE);		free(queue->tq_threads, M_GTASKQUEUE);
free(queue->tq_name, M_GTASKQUEUE);		free(queue->tq_name, M_GTASKQUEUE);
free(queue, M_GTASKQUEUE);		free(queue, M_GTASKQUEUE);
}		}

		static void
		schedule_ithread(struct gtaskqueue *queue)
		{
		struct proc *p;
		struct thread *td;
		struct gt_intr_thread *git;

		MPASS(queue->tq_tcount == 1);
		td = queue->tq_threads[0];
		git = &queue->tq_gt_intrs[0];
		p = td->td_proc;

		atomic_store_rel_int(&git->git_need, 1);
		thread_lock(td);
		if (TD_AWAITING_INTR(td)) {
		CTR3(KTR_INTR, "%s: schedule pid %d (%s)", __func__, p->p_pid,
		td->td_name);
		TD_CLR_IWAIT(td);
		sched_add(td, SRQ_INTR);
		} else {
		CTR5(KTR_INTR, "%s: pid %d (%s): it_need %d, state %d",
		__func__, p->p_pid, td->td_name, git->git_need, td->td_state);
		}
		thread_unlock(td);
		}

int		int
grouptaskqueue_enqueue(struct gtaskqueue queue, struct gtask gtask)		grouptaskqueue_enqueue(struct gtaskqueue queue, struct gtask gtask)
{		{
#ifdef INVARIANTS		#ifdef INVARIANTS
if (queue == NULL) {		if (queue == NULL) {
gtask_dump(gtask);		gtask_dump(gtask);
panic("queue == NULL");		panic("queue == NULL");
}		}
#endif		#endif
TQ_LOCK(queue);		TQ_LOCK(queue);
if (gtask->ta_flags & TASK_ENQUEUED) {		if (gtask->ta_flags & TASK_ENQUEUED) {
TQ_UNLOCK(queue);		TQ_UNLOCK(queue);
return (0);		return (0);
}		}
STAILQ_INSERT_TAIL(&queue->tq_queue, gtask, ta_link);		STAILQ_INSERT_TAIL(&queue->tq_queue, gtask, ta_link);
gtask->ta_flags \|= TASK_ENQUEUED;		gtask->ta_flags \|= TASK_ENQUEUED;
TQ_UNLOCK(queue);		TQ_UNLOCK(queue);
if ((queue->tq_flags & TQ_FLAGS_BLOCKED) == 0)		if ((queue->tq_flags & TQ_FLAGS_BLOCKED) == 0) {
		if (queue->tq_flags & TQ_FLAGS_INTR) {
		schedule_ithread(queue);
		} else {
queue->tq_enqueue(queue->tq_context);		queue->tq_enqueue(queue->tq_context);
		}
		}
return (0);		return (0);
}		}

static void		static void
gtaskqueue_task_nop_fn(void *context)		gtaskqueue_task_nop_fn(void *context)
{		{
}		}

▲ Show 20 Lines • Show All 188 Lines • ▼ Show 20 Lines	gtaskqueue_drain_all(struct gtaskqueue *queue)
TQ_LOCK(queue);		TQ_LOCK(queue);
gtaskqueue_drain_tq_queue(queue);		gtaskqueue_drain_tq_queue(queue);
gtaskqueue_drain_tq_active(queue);		gtaskqueue_drain_tq_active(queue);
TQ_UNLOCK(queue);		TQ_UNLOCK(queue);
}		}

static int		static int
_gtaskqueue_start_threads(struct gtaskqueue **tqp, int count, int pri,		_gtaskqueue_start_threads(struct gtaskqueue **tqp, int count, int pri,
cpuset_t mask, const char name, va_list ap)		cpuset_t mask, bool intr, const char name, va_list ap)
{		{
char ktname[MAXCOMLEN + 1];		char ktname[MAXCOMLEN + 1];
struct thread *td;		struct thread *td;
struct gtaskqueue *tq;		struct gtaskqueue *tq;
int i, error;		int i, error;

if (count <= 0)		if (count <= 0)
return (EINVAL);		return (EINVAL);

vsnprintf(ktname, sizeof(ktname), name, ap);		vsnprintf(ktname, sizeof(ktname), name, ap);
tq = *tqp;		tq = *tqp;

tq->tq_threads = malloc(sizeof(struct thread ) count, M_GTASKQUEUE,		tq->tq_threads = malloc(sizeof(struct thread ) count, M_GTASKQUEUE,
M_NOWAIT \| M_ZERO);		M_NOWAIT \| M_ZERO);
if (tq->tq_threads == NULL) {		if (tq->tq_threads == NULL) {
printf("%s: no memory for %s threads\n", __func__, ktname);		printf("%s: no memory for %s threads\n", __func__, ktname);
return (ENOMEM);		return (ENOMEM);
}		}
		tq->tq_gt_intrs = malloc(sizeof(struct gt_intr_thread) * count, M_GTASKQUEUE,
		M_NOWAIT \| M_ZERO);
		if (tq->tq_gt_intrs == NULL) {
		printf("%s: no memory for %s intr info\n", __func__, ktname);
		return (ENOMEM);
		}

for (i = 0; i < count; i++) {		for (i = 0; i < count; i++) {
if (count == 1)		if (count == 1)
error = kthread_add(gtaskqueue_thread_loop, tqp, NULL,		error = kthread_add(gtaskqueue_thread_loop, tqp, NULL,
&tq->tq_threads[i], RFSTOPPED, 0, "%s", ktname);		&tq->tq_threads[i], RFSTOPPED, 0, "%s", ktname);
else		else
error = kthread_add(gtaskqueue_thread_loop, tqp, NULL,		error = kthread_add(gtaskqueue_thread_loop, tqp, NULL,
&tq->tq_threads[i], RFSTOPPED, 0,		&tq->tq_threads[i], RFSTOPPED, 0,
"%s_%d", ktname, i);		"%s_%d", ktname, i);
if (error) {		if (error) {
/* should be ok to continue, taskqueue_free will dtrt */		/* should be ok to continue, taskqueue_free will dtrt */
printf("%s: kthread_add(%s): error %d", __func__,		printf("%s: kthread_add(%s): error %d", __func__,
ktname, error);		ktname, error);
tq->tq_threads[i] = NULL; /* paranoid */		tq->tq_threads[i] = NULL; /* paranoid */
} else		} else
tq->tq_tcount++;		tq->tq_tcount++;
}		}
		if (intr)
		tq->tq_flags \|= TQ_FLAGS_INTR;

for (i = 0; i < count; i++) {		for (i = 0; i < count; i++) {
if (tq->tq_threads[i] == NULL)		if (tq->tq_threads[i] == NULL)
continue;		continue;
td = tq->tq_threads[i];		td = tq->tq_threads[i];
if (mask) {		if (mask) {
error = cpuset_setthread(td->td_tid, mask);		error = cpuset_setthread(td->td_tid, mask);
/*		/*
* Failing to pin is rarely an actual fatal error;		* Failing to pin is rarely an actual fatal error;
* it'll just affect performance.		* it'll just affect performance.
*/		*/
if (error)		if (error)
printf("%s: curthread=%llu: can't pin; "		printf("%s: curthread=%llu: can't pin; "
"error=%d\n",		"error=%d\n",
__func__,		__func__,
(unsigned long long) td->td_tid,		(unsigned long long) td->td_tid,
error);		error);
}		}
thread_lock(td);		thread_lock(td);
sched_prio(td, pri);		sched_prio(td, pri);
		if (intr) {
		/* we need to schedule the thread from the interrupt handler for this to work */
		TD_SET_IWAIT(td);
		sched_class(td, PRI_ITHD);
		td->td_pflags \|= TDP_ITHREAD;
		} else {
sched_add(td, SRQ_BORING);		sched_add(td, SRQ_BORING);
		}
thread_unlock(td);		thread_unlock(td);
}		}

return (0);		return (0);
}		}

static int		static int
gtaskqueue_start_threads(struct gtaskqueue **tqp, int count, int pri,		gtaskqueue_start_threads(struct gtaskqueue **tqp, int count, int pri,
const char *name, ...)		bool intr, const char *name, ...)
{		{
va_list ap;		va_list ap;
int error;		int error;

va_start(ap, name);		va_start(ap, name);
error = _gtaskqueue_start_threads(tqp, count, pri, NULL, name, ap);		error = _gtaskqueue_start_threads(tqp, count, pri, NULL, intr, name, ap);
va_end(ap);		va_end(ap);
return (error);		return (error);
}		}

static inline void		static inline void
gtaskqueue_run_callback(struct gtaskqueue *tq,		gtaskqueue_run_callback(struct gtaskqueue *tq,
enum taskqueue_callback_type cb_type)		enum taskqueue_callback_type cb_type)
{		{
taskqueue_callback_fn tq_callback;		taskqueue_callback_fn tq_callback;

TQ_ASSERT_UNLOCKED(tq);		TQ_ASSERT_UNLOCKED(tq);
tq_callback = tq->tq_callbacks[cb_type];		tq_callback = tq->tq_callbacks[cb_type];
if (tq_callback != NULL)		if (tq_callback != NULL)
tq_callback(tq->tq_cb_contexts[cb_type]);		tq_callback(tq->tq_cb_contexts[cb_type]);
}		}

static void		static void
gtaskqueue_thread_loop(void *arg)		intr_thread_loop(struct gtaskqueue *tq)
{		{
struct gtaskqueue *tqp, tq;		struct gt_intr_thread *git;
		struct thread *td;

tqp = arg;		git = &tq->tq_gt_intrs[0];
tq = *tqp;		td = tq->tq_threads[0];
gtaskqueue_run_callback(tq, TASKQUEUE_CALLBACK_TYPE_INIT);		MPASS(tq->tq_tcount == 1);

		while ((tq->tq_flags & TQ_FLAGS_ACTIVE) != 0) {
		THREAD_NO_SLEEPING();
		while (atomic_cmpset_acq_int(&git->git_need, 1, 0) != 0) {
		gtaskqueue_run_locked(tq);
		}
		THREAD_SLEEPING_OK();

		/*
		* Because taskqueue_run() can drop tq_mutex, we need to
		* check if the TQ_FLAGS_ACTIVE flag wasn't removed in the
		* meantime, which means we missed a wakeup.
		*/
		if ((tq->tq_flags & TQ_FLAGS_ACTIVE) == 0)
		break;

		TQ_UNLOCK(tq);
		WITNESS_WARN(WARN_PANIC, NULL, "suspending ithread");
		mtx_assert(&Giant, MA_NOTOWNED);
		thread_lock(td);
		if (atomic_load_acq_int(&git->git_need) == 0 &&
		(git->git_flags & (IT_DEAD \| IT_WAIT)) == 0) {
		TD_SET_IWAIT(td);
		mi_switch(SW_VOL \| SWT_IWAIT, NULL);
		}
		#if 0
		/* XXX is this something we want? */
		if (git->git_flags & IT_WAIT) {
		wake = 1;
		git->git_flags &= ~IT_WAIT;
		}
		#endif
		thread_unlock(td);
TQ_LOCK(tq);		TQ_LOCK(tq);
		}
		THREAD_NO_SLEEPING();
		gtaskqueue_run_locked(tq);
		THREAD_SLEEPING_OK();
		}

		static void
		timeshare_thread_loop(struct gtaskqueue *tq)
		{
while ((tq->tq_flags & TQ_FLAGS_ACTIVE) != 0) {		while ((tq->tq_flags & TQ_FLAGS_ACTIVE) != 0) {
/* XXX ? */
gtaskqueue_run_locked(tq);		gtaskqueue_run_locked(tq);
/*		/*
* Because taskqueue_run() can drop tq_mutex, we need to		* Because taskqueue_run() can drop tq_mutex, we need to
* check if the TQ_FLAGS_ACTIVE flag wasn't removed in the		* check if the TQ_FLAGS_ACTIVE flag wasn't removed in the
* meantime, which means we missed a wakeup.		* meantime, which means we missed a wakeup.
*/		*/
if ((tq->tq_flags & TQ_FLAGS_ACTIVE) == 0)		if ((tq->tq_flags & TQ_FLAGS_ACTIVE) == 0)
break;		break;
TQ_SLEEP(tq, tq, &tq->tq_mutex, 0, "-", 0);		TQ_SLEEP(tq, tq, &tq->tq_mutex, 0, "-", 0);
}		}
gtaskqueue_run_locked(tq);		gtaskqueue_run_locked(tq);
		}

		static void
		gtaskqueue_thread_loop(void *arg)
		{
		struct gtaskqueue *tqp, tq;

		tqp = arg;
		tq = *tqp;
		gtaskqueue_run_callback(tq, TASKQUEUE_CALLBACK_TYPE_INIT);
		TQ_LOCK(tq);
		if (curthread->td_pflags & TDP_ITHREAD) {
		intr_thread_loop(tq);
		} else {
		timeshare_thread_loop(tq);
		}

/*		/*
* This thread is on its way out, so just drop the lock temporarily		* This thread is on its way out, so just drop the lock temporarily
* in order to call the shutdown callback. This allows the callback		* in order to call the shutdown callback. This allows the callback
* to look at the taskqueue, even just before it dies.		* to look at the taskqueue, even just before it dies.
*/		*/
TQ_UNLOCK(tq);		TQ_UNLOCK(tq);
gtaskqueue_run_callback(tq, TASKQUEUE_CALLBACK_TYPE_SHUTDOWN);		gtaskqueue_run_callback(tq, TASKQUEUE_CALLBACK_TYPE_SHUTDOWN);
TQ_LOCK(tq);		TQ_LOCK(tq);
Show All 30 Lines	struct taskqgroup_cpu {
struct gtaskqueue *tgc_taskq;		struct gtaskqueue *tgc_taskq;
int tgc_cnt;		int tgc_cnt;
int tgc_cpu;		int tgc_cpu;
};		};

struct taskqgroup {		struct taskqgroup {
struct taskqgroup_cpu tqg_queue[MAXCPU];		struct taskqgroup_cpu tqg_queue[MAXCPU];
struct mtx tqg_lock;		struct mtx tqg_lock;
		void (adjust_func)(void);
char * tqg_name;		char * tqg_name;
int tqg_adjusting;		int tqg_adjusting;
int tqg_stride;		int tqg_stride;
int tqg_cnt;		int tqg_cnt;
		int tqg_pri;
		int tqg_flags;
		bool tqg_intr;
};		};
		#define TQG_NEED_ADJUST 0x1
		#define TQG_ADJUSTED 0x2

struct taskq_bind_task {		struct taskq_bind_task {
struct gtask bt_task;		struct gtask bt_task;
int bt_cpuid;		int bt_cpuid;
};		};

static void		static void
taskqgroup_cpu_create(struct taskqgroup *qgroup, int idx, int cpu)		taskqgroup_cpu_create(struct taskqgroup *qgroup, int idx, int cpu, bool intr, int pri)
{		{
struct taskqgroup_cpu *qcpu;		struct taskqgroup_cpu *qcpu;

qcpu = &qgroup->tqg_queue[idx];		qcpu = &qgroup->tqg_queue[idx];
LIST_INIT(&qcpu->tgc_tasks);		LIST_INIT(&qcpu->tgc_tasks);
qcpu->tgc_taskq = gtaskqueue_create_fast(NULL, M_WAITOK,		qcpu->tgc_taskq = gtaskqueue_create_fast(NULL, M_WAITOK \| M_ZERO,
taskqueue_thread_enqueue, &qcpu->tgc_taskq);		taskqueue_thread_enqueue, &qcpu->tgc_taskq);
gtaskqueue_start_threads(&qcpu->tgc_taskq, 1, PI_SOFT,		gtaskqueue_start_threads(&qcpu->tgc_taskq, 1, pri,
"%s_%d", qgroup->tqg_name, idx);		intr, "%s_%d", qgroup->tqg_name, idx);
qcpu->tgc_cpu = cpu;		qcpu->tgc_cpu = cpu;
}		}

static void		static void
taskqgroup_cpu_remove(struct taskqgroup *qgroup, int idx)		taskqgroup_cpu_remove(struct taskqgroup *qgroup, int idx)
{		{

gtaskqueue_free(qgroup->tqg_queue[idx].tgc_taskq);		gtaskqueue_free(qgroup->tqg_queue[idx].tgc_taskq);
▲ Show 20 Lines • Show All 67 Lines • ▼ Show 20 Lines
SYSINIT(tqg_record_smp_started, SI_SUB_SMP, SI_ORDER_FOURTH,		SYSINIT(tqg_record_smp_started, SI_SUB_SMP, SI_ORDER_FOURTH,
tqg_record_smp_started, NULL);		tqg_record_smp_started, NULL);

void		void
taskqgroup_attach(struct taskqgroup qgroup, struct grouptask gtask,		taskqgroup_attach(struct taskqgroup qgroup, struct grouptask gtask,
void uniq, int irq, char name)		void uniq, int irq, char name)
{		{
cpuset_t mask;		cpuset_t mask;
int qid;		int qid, error;

gtask->gt_uniq = uniq;		gtask->gt_uniq = uniq;
gtask->gt_name = name;		gtask->gt_name = name;
gtask->gt_irq = irq;		gtask->gt_irq = irq;
gtask->gt_cpu = -1;		gtask->gt_cpu = -1;

mtx_lock(&qgroup->tqg_lock);		mtx_lock(&qgroup->tqg_lock);
		qgroup->tqg_flags \|= TQG_NEED_ADJUST;
		mtx_unlock(&qgroup->tqg_lock);

		if (tqg_smp_started && !(qgroup->tqg_flags & TQG_ADJUSTED))
		qgroup->adjust_func(NULL);

		mtx_lock(&qgroup->tqg_lock);
qid = taskqgroup_find(qgroup, uniq);		qid = taskqgroup_find(qgroup, uniq);
qgroup->tqg_queue[qid].tgc_cnt++;		qgroup->tqg_queue[qid].tgc_cnt++;
LIST_INSERT_HEAD(&qgroup->tqg_queue[qid].tgc_tasks, gtask, gt_list);		LIST_INSERT_HEAD(&qgroup->tqg_queue[qid].tgc_tasks, gtask, gt_list);
gtask->gt_taskqueue = qgroup->tqg_queue[qid].tgc_taskq;		gtask->gt_taskqueue = qgroup->tqg_queue[qid].tgc_taskq;
if (irq != -1 && tqg_smp_started) {		if (irq != -1 && tqg_smp_started) {
gtask->gt_cpu = qgroup->tqg_queue[qid].tgc_cpu;		gtask->gt_cpu = qgroup->tqg_queue[qid].tgc_cpu;
CPU_ZERO(&mask);		CPU_ZERO(&mask);
CPU_SET(qgroup->tqg_queue[qid].tgc_cpu, &mask);		CPU_SET(qgroup->tqg_queue[qid].tgc_cpu, &mask);
mtx_unlock(&qgroup->tqg_lock);		mtx_unlock(&qgroup->tqg_lock);
intr_setaffinity(irq, CPU_WHICH_IRQ, &mask);		error = intr_setaffinity(irq, CPU_WHICH_INTRHANDLER, &mask);
		if (error)
		printf("taskqgroup_attach: setaffinity failed: %d\n", error);
} else		} else
mtx_unlock(&qgroup->tqg_lock);		mtx_unlock(&qgroup->tqg_lock);
}		}

static void		static void
taskqgroup_attach_deferred(struct taskqgroup qgroup, struct grouptask gtask)		taskqgroup_attach_deferred(struct taskqgroup qgroup, struct grouptask gtask)
{		{
cpuset_t mask;		cpuset_t mask;
int qid, cpu;		int qid, cpu, error;

mtx_lock(&qgroup->tqg_lock);		mtx_lock(&qgroup->tqg_lock);
qid = taskqgroup_find(qgroup, gtask->gt_uniq);		qid = taskqgroup_find(qgroup, gtask->gt_uniq);
cpu = qgroup->tqg_queue[qid].tgc_cpu;		cpu = qgroup->tqg_queue[qid].tgc_cpu;
if (gtask->gt_irq != -1) {		if (gtask->gt_irq != -1) {
mtx_unlock(&qgroup->tqg_lock);		mtx_unlock(&qgroup->tqg_lock);

CPU_ZERO(&mask);		CPU_ZERO(&mask);
CPU_SET(cpu, &mask);		CPU_SET(cpu, &mask);
intr_setaffinity(gtask->gt_irq, CPU_WHICH_IRQ, &mask);		error = intr_setaffinity(gtask->gt_irq, CPU_WHICH_INTRHANDLER, &mask);

mtx_lock(&qgroup->tqg_lock);		mtx_lock(&qgroup->tqg_lock);
		if (error)
		printf("taskqgroup_attach_deferred: setaffinity failed: %d\n", error);
}		}
qgroup->tqg_queue[qid].tgc_cnt++;		qgroup->tqg_queue[qid].tgc_cnt++;

LIST_INSERT_HEAD(&qgroup->tqg_queue[qid].tgc_tasks, gtask,		LIST_INSERT_HEAD(&qgroup->tqg_queue[qid].tgc_tasks, gtask,
gt_list);		gt_list);
MPASS(qgroup->tqg_queue[qid].tgc_taskq != NULL);		MPASS(qgroup->tqg_queue[qid].tgc_taskq != NULL);
gtask->gt_taskqueue = qgroup->tqg_queue[qid].tgc_taskq;		gtask->gt_taskqueue = qgroup->tqg_queue[qid].tgc_taskq;
mtx_unlock(&qgroup->tqg_lock);		mtx_unlock(&qgroup->tqg_lock);
}		}

		static int
		taskqgroup_adjust_deferred(struct taskqgroup *qgroup, int cpu)
		{
		int i, error = 0, cpu_max = -1;

		mtx_lock(&qgroup->tqg_lock);
		for (i = 0; i < qgroup->tqg_cnt; i++)
		if (qgroup->tqg_queue[i].tgc_cpu > cpu_max)
		cpu_max = qgroup->tqg_queue[i].tgc_cpu;
		if (cpu_max >= cpu) {
		mtx_unlock(&qgroup->tqg_lock);
		return (0);
		}
		MPASS(cpu <= mp_maxid);
		error = _taskqgroup_adjust(qgroup, cpu + 1, qgroup->tqg_stride,
		qgroup->tqg_intr, qgroup->tqg_pri);
		if (error) {
		printf("%s: _taskqgroup_adjust(%p, %d, %d, %d, %d) => %d\n\n",
		__func__, qgroup, cpu + 1, qgroup->tqg_stride, qgroup->tqg_intr,
		qgroup->tqg_pri, error);
		goto out;
		}
		for (i = 0; i < qgroup->tqg_cnt; i++)
		if (qgroup->tqg_queue[i].tgc_cpu > cpu_max)
		cpu_max = qgroup->tqg_queue[i].tgc_cpu;
		MPASS(cpu_max >= cpu);
		out:
		mtx_unlock(&qgroup->tqg_lock);
		return (error);
		}

int		int
taskqgroup_attach_cpu(struct taskqgroup qgroup, struct grouptask gtask,		taskqgroup_attach_cpu(struct taskqgroup qgroup, struct grouptask gtask,
void uniq, int cpu, int irq, char name)		void uniq, int cpu, int irq, char name)
{		{
cpuset_t mask;		cpuset_t mask;
int i, qid;		int i, error, qid;

qid = -1;		qid = -1;
gtask->gt_uniq = uniq;		gtask->gt_uniq = uniq;
gtask->gt_name = name;		gtask->gt_name = name;
gtask->gt_irq = irq;		gtask->gt_irq = irq;
gtask->gt_cpu = cpu;		gtask->gt_cpu = cpu;
		MPASS(cpu >= 0);

mtx_lock(&qgroup->tqg_lock);		mtx_lock(&qgroup->tqg_lock);
		qgroup->tqg_flags \|= TQG_NEED_ADJUST;
		mtx_unlock(&qgroup->tqg_lock);

		if (tqg_smp_started && !(qgroup->tqg_flags & TQG_ADJUSTED)) {
		uintptr_t cpuid = cpu + 1;
		qgroup->adjust_func((void *)cpuid);
		}
		if ((error = taskqgroup_adjust_deferred(qgroup, cpu)))
		return (error);

		mtx_lock(&qgroup->tqg_lock);
if (tqg_smp_started) {		if (tqg_smp_started) {
for (i = 0; i < qgroup->tqg_cnt; i++)		for (i = 0; i < qgroup->tqg_cnt; i++) {
if (qgroup->tqg_queue[i].tgc_cpu == cpu) {		if (qgroup->tqg_queue[i].tgc_cpu == cpu) {
qid = i;		qid = i;
break;		break;
}		}
		#ifdef INVARIANTS
		else
		printf("qgroup->tqg_queue[%d].tgc_cpu=0x%x tgc_cnt=0x%x\n",
		i, qgroup->tqg_queue[i].tgc_cpu, qgroup->tqg_queue[i].tgc_cnt);

		#endif
		}
if (qid == -1) {		if (qid == -1) {
mtx_unlock(&qgroup->tqg_lock);		mtx_unlock(&qgroup->tqg_lock);
		printf("%s: qid not found for cpu=%d\n", __func__, cpu);
return (EINVAL);		return (EINVAL);
}		}
} else		} else
qid = 0;		qid = 0;
qgroup->tqg_queue[qid].tgc_cnt++;		qgroup->tqg_queue[qid].tgc_cnt++;
LIST_INSERT_HEAD(&qgroup->tqg_queue[qid].tgc_tasks, gtask, gt_list);		LIST_INSERT_HEAD(&qgroup->tqg_queue[qid].tgc_tasks, gtask, gt_list);
gtask->gt_taskqueue = qgroup->tqg_queue[qid].tgc_taskq;		gtask->gt_taskqueue = qgroup->tqg_queue[qid].tgc_taskq;
cpu = qgroup->tqg_queue[qid].tgc_cpu;		cpu = qgroup->tqg_queue[qid].tgc_cpu;
mtx_unlock(&qgroup->tqg_lock);		mtx_unlock(&qgroup->tqg_lock);

CPU_ZERO(&mask);		CPU_ZERO(&mask);
CPU_SET(cpu, &mask);		CPU_SET(cpu, &mask);
if (irq != -1 && tqg_smp_started)		if (irq != -1 && tqg_smp_started) {
intr_setaffinity(irq, CPU_WHICH_IRQ, &mask);		error = intr_setaffinity(irq, CPU_WHICH_INTRHANDLER, &mask);
		if (error)
		printf("taskqgroup_attach_cpu: setaffinity failed: %d\n", error);
		}
return (0);		return (0);
}		}

static int		static int
taskqgroup_attach_cpu_deferred(struct taskqgroup qgroup, struct grouptask gtask)		taskqgroup_attach_cpu_deferred(struct taskqgroup qgroup, struct grouptask gtask)
{		{
cpuset_t mask;		cpuset_t mask;
int i, qid, irq, cpu;		int i, qid, irq, cpu, error;

qid = -1;		qid = -1;
irq = gtask->gt_irq;		irq = gtask->gt_irq;
cpu = gtask->gt_cpu;		cpu = gtask->gt_cpu;
MPASS(tqg_smp_started);		MPASS(tqg_smp_started);

		if ((error = taskqgroup_adjust_deferred(qgroup, cpu)))
		return (error);
mtx_lock(&qgroup->tqg_lock);		mtx_lock(&qgroup->tqg_lock);
		/* adjust as needed */
		MPASS(cpu <= mp_maxid);
for (i = 0; i < qgroup->tqg_cnt; i++)		for (i = 0; i < qgroup->tqg_cnt; i++)
if (qgroup->tqg_queue[i].tgc_cpu == cpu) {		if (qgroup->tqg_queue[i].tgc_cpu == cpu) {
qid = i;		qid = i;
break;		break;
}		}
if (qid == -1) {		if (qid == -1) {
mtx_unlock(&qgroup->tqg_lock);		mtx_unlock(&qgroup->tqg_lock);
		printf("%s: qid not found for cpu=%d\n", __func__, cpu);
return (EINVAL);		return (EINVAL);
}		}
qgroup->tqg_queue[qid].tgc_cnt++;		qgroup->tqg_queue[qid].tgc_cnt++;
LIST_INSERT_HEAD(&qgroup->tqg_queue[qid].tgc_tasks, gtask, gt_list);		LIST_INSERT_HEAD(&qgroup->tqg_queue[qid].tgc_tasks, gtask, gt_list);
MPASS(qgroup->tqg_queue[qid].tgc_taskq != NULL);		MPASS(qgroup->tqg_queue[qid].tgc_taskq != NULL);
gtask->gt_taskqueue = qgroup->tqg_queue[qid].tgc_taskq;		gtask->gt_taskqueue = qgroup->tqg_queue[qid].tgc_taskq;
mtx_unlock(&qgroup->tqg_lock);		mtx_unlock(&qgroup->tqg_lock);

CPU_ZERO(&mask);		CPU_ZERO(&mask);
CPU_SET(cpu, &mask);		CPU_SET(cpu, &mask);

if (irq != -1)		if (irq != -1) {
intr_setaffinity(irq, CPU_WHICH_IRQ, &mask);		error = intr_setaffinity(irq, CPU_WHICH_INTRHANDLER, &mask);
		if (error)
		printf("taskqgroup_attach_cpu: setaffinity failed: %d\n", error);
		}
return (0);		return (0);
}		}

void		void
taskqgroup_detach(struct taskqgroup qgroup, struct grouptask gtask)		taskqgroup_detach(struct taskqgroup qgroup, struct grouptask gtask)
{		{
int i;		int i;

Show All 22 Lines	taskqgroup_binder(void *ctx)
thread_lock(curthread);		thread_lock(curthread);
sched_bind(curthread, gtask->bt_cpuid);		sched_bind(curthread, gtask->bt_cpuid);
thread_unlock(curthread);		thread_unlock(curthread);

if (error)		if (error)
printf("taskqgroup_binder: setaffinity failed: %d\n",		printf("taskqgroup_binder: setaffinity failed: %d\n",
error);		error);
free(gtask, M_DEVBUF);		free(gtask, M_DEVBUF);

}		}
		static void
		taskqgroup_ithread_binder(void *ctx)
		{
		struct taskq_bind_task gtask = (struct taskq_bind_task )ctx;
		cpuset_t mask;
		int error;

		CPU_ZERO(&mask);
		CPU_SET(gtask->bt_cpuid, &mask);
		error = cpuset_setthread(curthread->td_tid, &mask);

		if (error)
		printf("taskqgroup_binder: setaffinity failed: %d\n",
		error);
		free(gtask, M_DEVBUF);

		}
static void		static void
taskqgroup_bind(struct taskqgroup *qgroup)		taskqgroup_bind(struct taskqgroup *qgroup)
{		{
struct taskq_bind_task *gtask;		struct taskq_bind_task *gtask;
int i;		int i;

/*		/*
* Bind taskqueue threads to specific CPUs, if they have been assigned		* Bind taskqueue threads to specific CPUs, if they have been assigned
* one.		* one.
*/		*/
if (qgroup->tqg_cnt == 1)		if (qgroup->tqg_cnt == 1)
return;		return;

for (i = 0; i < qgroup->tqg_cnt; i++) {		for (i = 0; i < qgroup->tqg_cnt; i++) {
gtask = malloc(sizeof (*gtask), M_DEVBUF, M_WAITOK);		gtask = malloc(sizeof (*gtask), M_DEVBUF, M_WAITOK);
		if (qgroup->tqg_intr)
		GTASK_INIT(&gtask->bt_task, 0, 0, taskqgroup_ithread_binder, gtask);
		else
GTASK_INIT(&gtask->bt_task, 0, 0, taskqgroup_binder, gtask);		GTASK_INIT(&gtask->bt_task, 0, 0, taskqgroup_binder, gtask);
gtask->bt_cpuid = qgroup->tqg_queue[i].tgc_cpu;		gtask->bt_cpuid = qgroup->tqg_queue[i].tgc_cpu;
grouptaskqueue_enqueue(qgroup->tqg_queue[i].tgc_taskq,		grouptaskqueue_enqueue(qgroup->tqg_queue[i].tgc_taskq,
&gtask->bt_task);		&gtask->bt_task);
}		}
}		}

static int		static int
_taskqgroup_adjust(struct taskqgroup *qgroup, int cnt, int stride)		_taskqgroup_adjust(struct taskqgroup *qgroup, int cnt, int stride, bool ithread, int pri)
{		{
LIST_HEAD(, grouptask) gtask_head = LIST_HEAD_INITIALIZER(NULL);		LIST_HEAD(, grouptask) gtask_head = LIST_HEAD_INITIALIZER(NULL);
struct grouptask *gtask;		struct grouptask *gtask;
int i, k, old_cnt, old_cpu, cpu;		int i, k, old_cnt, old_cpu, cpu;

mtx_assert(&qgroup->tqg_lock, MA_OWNED);		mtx_assert(&qgroup->tqg_lock, MA_OWNED);

if (cnt < 1 \|\| cnt * stride > mp_ncpus \|\| !tqg_smp_started) {		if (cnt < 1 \|\| cnt * stride > mp_ncpus \|\| !tqg_smp_started) {
printf("%s: failed cnt: %d stride: %d "		printf("%s: failed cnt: %d stride: %d "
"mp_ncpus: %d tqg_smp_started: %d\n",		"mp_ncpus: %d tqg_smp_started: %d\n",
__func__, cnt, stride, mp_ncpus, tqg_smp_started);		__func__, cnt, stride, mp_ncpus, tqg_smp_started);
return (EINVAL);		return (EINVAL);
}		}
if (qgroup->tqg_adjusting) {		if (qgroup->tqg_adjusting) {
printf("taskqgroup_adjust failed: adjusting\n");		printf("%s: failed: adjusting\n", __func__);
return (EBUSY);		return (EBUSY);
}		}
		/* No work to be done */
		if (qgroup->tqg_cnt == cnt)
		return (0);
qgroup->tqg_adjusting = 1;		qgroup->tqg_adjusting = 1;
old_cnt = qgroup->tqg_cnt;		old_cnt = qgroup->tqg_cnt;
old_cpu = 0;		old_cpu = 0;
if (old_cnt < cnt)		if (old_cnt < cnt) {
old_cpu = qgroup->tqg_queue[old_cnt].tgc_cpu;		int old_max_idx = max(0, old_cnt-1);
		old_cpu = qgroup->tqg_queue[old_max_idx].tgc_cpu;
		if (old_cnt > 0)
		for (k = 0; k < stride; k++)
		old_cpu = CPU_NEXT(old_cpu);
		}
mtx_unlock(&qgroup->tqg_lock);		mtx_unlock(&qgroup->tqg_lock);
/*		/*
* Set up queue for tasks added before boot.		* Set up queue for tasks added before boot.
*/		*/
if (old_cnt == 0) {		if (old_cnt == 0) {
LIST_SWAP(&gtask_head, &qgroup->tqg_queue[0].tgc_tasks,		LIST_SWAP(&gtask_head, &qgroup->tqg_queue[0].tgc_tasks,
grouptask, gt_list);		grouptask, gt_list);
qgroup->tqg_queue[0].tgc_cnt = 0;		qgroup->tqg_queue[0].tgc_cnt = 0;
}		}

/*		/*
* If new taskq threads have been added.		* If new taskq threads have been added.
*/		*/
cpu = old_cpu;		cpu = old_cpu;
for (i = old_cnt; i < cnt; i++) {		for (i = old_cnt; i < cnt; i++) {
taskqgroup_cpu_create(qgroup, i, cpu);		taskqgroup_cpu_create(qgroup, i, cpu, ithread, pri);

for (k = 0; k < stride; k++)		for (k = 0; k < stride; k++)
cpu = CPU_NEXT(cpu);		cpu = CPU_NEXT(cpu);
}		}
mtx_lock(&qgroup->tqg_lock);		mtx_lock(&qgroup->tqg_lock);
qgroup->tqg_cnt = cnt;		qgroup->tqg_cnt = cnt;
qgroup->tqg_stride = stride;		qgroup->tqg_stride = stride;
		qgroup->tqg_intr = ithread;
		qgroup->tqg_pri = pri;

/*		/*
* Adjust drivers to use new taskqs.		* Adjust drivers to use new taskqs.
*/		*/
for (i = 0; i < old_cnt; i++) {		for (i = 0; i < old_cnt; i++) {
while ((gtask = LIST_FIRST(&qgroup->tqg_queue[i].tgc_tasks))) {		while ((gtask = LIST_FIRST(&qgroup->tqg_queue[i].tgc_tasks))) {
LIST_REMOVE(gtask, gt_list);		LIST_REMOVE(gtask, gt_list);
qgroup->tqg_queue[i].tgc_cnt--;		qgroup->tqg_queue[i].tgc_cnt--;
Show All 29 Lines	#endif

mtx_lock(&qgroup->tqg_lock);		mtx_lock(&qgroup->tqg_lock);
qgroup->tqg_adjusting = 0;		qgroup->tqg_adjusting = 0;

return (0);		return (0);
}		}

int		int
taskqgroup_adjust(struct taskqgroup *qgroup, int cnt, int stride)		taskqgroup_adjust(struct taskqgroup *qgroup, int cnt, int stride, bool ithread, int pri)
{		{
int error;		int error;

mtx_lock(&qgroup->tqg_lock);		mtx_lock(&qgroup->tqg_lock);
error = _taskqgroup_adjust(qgroup, cnt, stride);		error = _taskqgroup_adjust(qgroup, cnt, stride, ithread, pri);
mtx_unlock(&qgroup->tqg_lock);		mtx_unlock(&qgroup->tqg_lock);

return (error);		return (error);
}		}

		void
		taskqgroup_set_adjust(struct taskqgroup qgroup, void (adjust_func)(void*))
		{
		qgroup-> adjust_func = adjust_func;
		}

		int
		taskqgroup_adjust_once(struct taskqgroup *qgroup, int cnt, int stride, bool ithread, int pri)
		{
		int error = 0;

		mtx_lock(&qgroup->tqg_lock);
		if ((qgroup->tqg_flags & (TQG_ADJUSTED\|TQG_NEED_ADJUST)) == TQG_NEED_ADJUST) {
		qgroup->tqg_flags \|= TQG_ADJUSTED;
		error = _taskqgroup_adjust(qgroup, cnt, stride, ithread, pri);
		MPASS(error == 0);
		}
		mtx_unlock(&qgroup->tqg_lock);

		return (error);
		}

struct taskqgroup *		struct taskqgroup *
taskqgroup_create(char *name)		taskqgroup_create(char *name)
{		{
struct taskqgroup *qgroup;		struct taskqgroup *qgroup;

qgroup = malloc(sizeof(*qgroup), M_GTASKQUEUE, M_WAITOK \| M_ZERO);		qgroup = malloc(sizeof(*qgroup), M_GTASKQUEUE, M_WAITOK \| M_ZERO);
mtx_init(&qgroup->tqg_lock, "taskqgroup", NULL, MTX_DEF);		mtx_init(&qgroup->tqg_lock, "taskqgroup", NULL, MTX_DEF);
qgroup->tqg_name = name;		qgroup->tqg_name = name;
LIST_INIT(&qgroup->tqg_queue[0].tgc_tasks);		LIST_INIT(&qgroup->tqg_queue[0].tgc_tasks);
		MPASS(qgroup->tqg_queue[0].tgc_cnt == 0);
		MPASS(qgroup->tqg_queue[0].tgc_cpu == 0);
		MPASS(qgroup->tqg_queue[0].tgc_taskq == 0);
return (qgroup);		return (qgroup);
}		}

void		void
taskqgroup_destroy(struct taskqgroup *qgroup)		taskqgroup_destroy(struct taskqgroup *qgroup)
{		{

}		}