2 * Copyright (c) 2009 Pawel Jakub Dawidek <pjd@FreeBSD.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
30 #include <sys/param.h>
31 #include <sys/kernel.h>
34 #include <sys/mutex.h>
35 #include <sys/queue.h>
36 #include <sys/taskqueue.h>
37 #include <sys/taskq.h>
41 static uma_zone_t taskq_zone;
43 taskq_t *system_taskq = NULL;
46 system_taskq_init(void *arg)
49 taskq_zone = uma_zcreate("taskq_zone", sizeof(struct ostask),
50 NULL, NULL, NULL, NULL, 0, 0);
51 system_taskq = taskq_create("system_taskq", mp_ncpus, 0, 0, 0, 0);
53 SYSINIT(system_taskq_init, SI_SUB_CONFIGURE, SI_ORDER_ANY, system_taskq_init, NULL);
56 system_taskq_fini(void *arg)
59 taskq_destroy(system_taskq);
60 uma_zdestroy(taskq_zone);
62 SYSUNINIT(system_taskq_fini, SI_SUB_CONFIGURE, SI_ORDER_ANY, system_taskq_fini, NULL);
65 taskq_create(const char *name, int nthreads, pri_t pri, int minalloc __unused,
66 int maxalloc __unused, uint_t flags)
70 if ((flags & TASKQ_THREADS_CPU_PCT) != 0)
71 nthreads = MAX((mp_ncpus * nthreads) / 100, 1);
73 tq = kmem_alloc(sizeof(*tq), KM_SLEEP);
74 tq->tq_queue = taskqueue_create(name, M_WAITOK, taskqueue_thread_enqueue,
76 (void) taskqueue_start_threads(&tq->tq_queue, nthreads, pri, name);
78 return ((taskq_t *)tq);
82 taskq_create_proc(const char *name, int nthreads, pri_t pri, int minalloc,
83 int maxalloc, proc_t *proc __unused, uint_t flags)
86 return (taskq_create(name, nthreads, pri, minalloc, maxalloc, flags));
90 taskq_destroy(taskq_t *tq)
93 taskqueue_free(tq->tq_queue);
94 kmem_free(tq, sizeof(*tq));
98 taskq_member(taskq_t *tq, kthread_t *thread)
101 return (taskqueue_member(tq->tq_queue, thread));
105 taskq_run(void *arg, int pending __unused)
107 struct ostask *task = arg;
109 task->ost_func(task->ost_arg);
111 uma_zfree(taskq_zone, task);
115 taskq_dispatch(taskq_t *tq, task_func_t func, void *arg, uint_t flags)
120 if ((flags & (TQ_SLEEP | TQ_NOQUEUE)) == TQ_SLEEP)
125 task = uma_zalloc(taskq_zone, mflag);
129 task->ost_func = func;
132 TASK_INIT(&task->ost_task, 0, taskq_run, task);
133 taskqueue_enqueue(tq->tq_queue, &task->ost_task);
135 return ((taskqid_t)(void *)task);
138 #define TASKQ_MAGIC 0x74541c
141 taskq_run_safe(void *arg, int pending __unused)
143 struct ostask *task = arg;
145 ASSERT(task->ost_magic == TASKQ_MAGIC);
146 task->ost_func(task->ost_arg);
151 taskq_dispatch_safe(taskq_t *tq, task_func_t func, void *arg,
155 ASSERT(task->ost_magic != TASKQ_MAGIC);
157 task->ost_magic = TASKQ_MAGIC;
158 task->ost_func = func;
161 TASK_INIT(&task->ost_task, 0, taskq_run_safe, task);
162 taskqueue_enqueue(tq->tq_queue, &task->ost_task);
164 return ((taskqid_t)(void *)task);