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