blob: 59aae4db8f6f19edb1e4cd72f951d098882f6280 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
|
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (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 2010 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/*
* Copyright 2011 Nexenta Systems, Inc. All rights reserved.
* Copyright (c) 2017 by Delphix. All rights reserved.
* Copyright 2017 RackTop Systems.
*/
#ifndef _SYS_TASKQ_IMPL_H
#define _SYS_TASKQ_IMPL_H
#include <sys/taskq.h>
#include <sys/inttypes.h>
#include <sys/vmem.h>
#include <sys/list.h>
#include <sys/kstat.h>
#include <sys/rwlock.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;
union {
taskq_bucket_t *tqent_bucket;
uintptr_t tqent_flags;
} tqent_un;
kthread_t *tqent_thread;
kcondvar_t tqent_cv;
} taskq_ent_t;
#define TQENT_FLAG_PREALLOC 0x1
/*
* 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_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
#define TASKQ_INTERFACE_FLAGS 0x0000ffff /* defined in <sys/taskq.h> */
/*
* taskq implementation flags: bit range 16-31
*/
#define TASKQ_CHANGING 0x00010000 /* nthreads != target */
#define TASKQ_SUSPENDED 0x00020000 /* taskq is suspended */
#define TASKQ_NOINSTANCE 0x00040000 /* no instance number */
#define TASKQ_THREAD_CREATED 0x00080000 /* a thread has been created */
#define TASKQ_DUTY_CYCLE 0x00100000 /* using the SDC class */
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;
kcondvar_t tq_exit_cv;
pri_t tq_pri; /* Scheduling priority */
uint_t tq_flags;
int tq_active;
int tq_nthreads;
int tq_nthreads_target;
int tq_nthreads_max;
int tq_threads_ncpus_pct;
int tq_nalloc;
int tq_minalloc;
int tq_maxalloc;
kcondvar_t tq_maxalloc_cv;
int tq_maxalloc_wait;
taskq_ent_t *tq_freelist;
taskq_ent_t tq_task;
int tq_maxsize;
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;
list_node_t tq_cpupct_link; /* linkage for taskq_cpupct_list */
struct proc *tq_proc; /* process for taskq threads */
int tq_cpupart; /* cpupart id bound to */
uint_t tq_DC; /* duty cycle for SDC */
/*
* Statistics.
*/
kstat_t *tq_kstat; /* Exported statistics */
hrtime_t tq_totaltime; /* Time spent processing tasks */
uint64_t tq_nomem; /* # of times there was no memory */
uint64_t tq_tasks; /* Total # of tasks posted */
uint64_t tq_executed; /* Total # of tasks executed */
int tq_maxtasks; /* Max number of tasks in the queue */
int tq_tcreates;
int tq_tdeaths;
};
/* Special form of taskq dispatch that uses preallocated entries. */
void taskq_dispatch_ent(taskq_t *, task_func_t, void *, uint_t, taskq_ent_t *);
#define tq_thread tq_thr._tq_thread
#define tq_threadlist tq_thr._tq_threadlist
/* The MAX guarantees we have at least one thread */
#define TASKQ_THREADS_PCT(ncpus, pct) MAX(((ncpus) * (pct)) / 100, 1)
#ifdef __cplusplus
}
#endif
#endif /* _SYS_TASKQ_IMPL_H */
|
