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/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License, Version 1.0 only
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* (the "License"). You may not use this file except in compliance
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* with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or http://www.opensolaris.org/os/licensing.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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/*
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* Copyright 2004 Sun Microsystems, Inc. All rights reserved.
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* Use is subject to license terms.
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*/
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#ifndef _SYS_TASKQ_IMPL_H
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#define _SYS_TASKQ_IMPL_H
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#pragma ident "%Z%%M% %I% %E% SMI"
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#include <sys/taskq.h>
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#include <sys/vmem.h>
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#include <sys/kstat.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef struct taskq_bucket taskq_bucket_t;
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typedef struct taskq_ent {
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struct taskq_ent *tqent_next;
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struct taskq_ent *tqent_prev;
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task_func_t *tqent_func;
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void *tqent_arg;
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taskq_bucket_t *tqent_bucket;
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kthread_t *tqent_thread;
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kcondvar_t tqent_cv;
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} taskq_ent_t;
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/*
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* Taskq Statistics fields are not protected by any locks.
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*/
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typedef struct tqstat {
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uint_t tqs_hits;
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uint_t tqs_misses;
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uint_t tqs_overflow; /* no threads to allocate */
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uint_t tqs_tcreates; /* threads created */
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uint_t tqs_tdeaths; /* threads died */
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uint_t tqs_maxthreads; /* max # of alive threads */
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uint_t tqs_nomem; /* # of times there were no memory */
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uint_t tqs_disptcreates;
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} tqstat_t;
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/*
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* Per-CPU hash bucket manages taskq_bent_t structures using freelist.
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*/
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struct taskq_bucket {
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kmutex_t tqbucket_lock;
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taskq_t *tqbucket_taskq; /* Enclosing taskq */
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taskq_ent_t tqbucket_freelist;
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uint_t tqbucket_nalloc; /* # of allocated entries */
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uint_t tqbucket_nfree; /* # of free entries */
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kcondvar_t tqbucket_cv;
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ushort_t tqbucket_flags;
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hrtime_t tqbucket_totaltime;
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tqstat_t tqbucket_stat;
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};
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/*
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* Bucket flags.
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*/
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#define TQBUCKET_CLOSE 0x01
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#define TQBUCKET_SUSPEND 0x02
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/*
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* taskq implementation flags: bit range 16-31
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*/
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#define TASKQ_ACTIVE 0x00010000
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#define TASKQ_SUSPENDED 0x00020000
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#define TASKQ_NOINSTANCE 0x00040000
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struct taskq {
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char tq_name[TASKQ_NAMELEN + 1];
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kmutex_t tq_lock;
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krwlock_t tq_threadlock;
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kcondvar_t tq_dispatch_cv;
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kcondvar_t tq_wait_cv;
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uint_t tq_flags;
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int tq_active;
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int tq_nthreads;
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int tq_nalloc;
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int tq_minalloc;
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int tq_maxalloc;
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taskq_ent_t *tq_freelist;
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taskq_ent_t tq_task;
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int tq_maxsize;
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pri_t tq_pri; /* Scheduling priority */
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taskq_bucket_t *tq_buckets; /* Per-cpu array of buckets */
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int tq_instance;
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uint_t tq_nbuckets; /* # of buckets (2^n) */
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union {
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kthread_t *_tq_thread;
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kthread_t **_tq_threadlist;
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} tq_thr;
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/*
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* Statistics.
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*/
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kstat_t *tq_kstat; /* Exported statistics */
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hrtime_t tq_totaltime; /* Time spent processing tasks */
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int tq_tasks; /* Total # of tasks posted */
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int tq_executed; /* Total # of tasks executed */
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int tq_maxtasks; /* Max number of tasks in the queue */
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int tq_tcreates;
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int tq_tdeaths;
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};
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#define tq_thread tq_thr._tq_thread
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#define tq_threadlist tq_thr._tq_threadlist
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#ifdef __cplusplus
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}
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#endif
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#endif /* _SYS_TASKQ_IMPL_H */
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