1 /*****************************************************************************\
2 * Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC.
3 * Copyright (C) 2007 The Regents of the University of California.
4 * Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
5 * Written by Brian Behlendorf <behlendorf1@llnl.gov>.
8 * This file is part of the SPL, Solaris Porting Layer.
9 * For details, see <http://zfsonlinux.org/>.
11 * The SPL is free software; you can redistribute it and/or modify it
12 * under the terms of the GNU General Public License as published by the
13 * Free Software Foundation; either version 2 of the License, or (at your
14 * option) any later version.
16 * The SPL is distributed in the hope that it will be useful, but WITHOUT
17 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
18 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
21 * You should have received a copy of the GNU General Public License along
22 * with the SPL. If not, see <http://www.gnu.org/licenses/>.
23 *****************************************************************************
24 * Solaris Porting LAyer Tests (SPLAT) Atomic Tests.
25 \*****************************************************************************/
27 #include <sys/atomic.h>
28 #include <sys/thread.h>
29 #include <sys/mutex.h>
30 #include <linux/mm_compat.h>
31 #include <linux/slab.h>
32 #include "splat-internal.h"
34 #define SPLAT_ATOMIC_NAME "atomic"
35 #define SPLAT_ATOMIC_DESC "Kernel Atomic Tests"
37 #define SPLAT_ATOMIC_TEST1_ID 0x0b01
38 #define SPLAT_ATOMIC_TEST1_NAME "64-bit"
39 #define SPLAT_ATOMIC_TEST1_DESC "Validate 64-bit atomic ops"
41 #define SPLAT_ATOMIC_TEST_MAGIC 0x43435454UL
42 #define SPLAT_ATOMIC_INIT_VALUE 10000000UL
45 SPLAT_ATOMIC_INC_64
= 0,
46 SPLAT_ATOMIC_DEC_64
= 1,
47 SPLAT_ATOMIC_ADD_64
= 2,
48 SPLAT_ATOMIC_SUB_64
= 3,
49 SPLAT_ATOMIC_ADD_64_NV
= 4,
50 SPLAT_ATOMIC_SUB_64_NV
= 5,
51 SPLAT_ATOMIC_COUNT_64
= 6
54 typedef struct atomic_priv
{
55 unsigned long ap_magic
;
58 wait_queue_head_t ap_waitq
;
59 volatile uint64_t ap_atomic
;
60 volatile uint64_t ap_atomic_exited
;
66 splat_atomic_work(void *priv
)
72 ap
= (atomic_priv_t
*)priv
;
73 ASSERT(ap
->ap_magic
== SPLAT_ATOMIC_TEST_MAGIC
);
75 mutex_enter(&ap
->ap_lock
);
77 wake_up(&ap
->ap_waitq
);
78 mutex_exit(&ap
->ap_lock
);
80 splat_vprint(ap
->ap_file
, SPLAT_ATOMIC_TEST1_NAME
,
81 "Thread %d successfully started: %lu/%lu\n", op
,
82 (long unsigned)ap
->ap_atomic
,
83 (long unsigned)ap
->ap_atomic_exited
);
85 for (i
= 0; i
< SPLAT_ATOMIC_INIT_VALUE
/ 10; i
++) {
87 /* Periodically sleep to mix up the ordering */
88 if ((i
% (SPLAT_ATOMIC_INIT_VALUE
/ 100)) == 0) {
89 splat_vprint(ap
->ap_file
, SPLAT_ATOMIC_TEST1_NAME
,
90 "Thread %d sleeping: %lu/%lu\n", op
,
91 (long unsigned)ap
->ap_atomic
,
92 (long unsigned)ap
->ap_atomic_exited
);
93 set_current_state(TASK_INTERRUPTIBLE
);
94 schedule_timeout(HZ
/ 100);
98 case SPLAT_ATOMIC_INC_64
:
99 atomic_inc_64(&ap
->ap_atomic
);
101 case SPLAT_ATOMIC_DEC_64
:
102 atomic_dec_64(&ap
->ap_atomic
);
104 case SPLAT_ATOMIC_ADD_64
:
105 atomic_add_64(&ap
->ap_atomic
, 3);
107 case SPLAT_ATOMIC_SUB_64
:
108 atomic_sub_64(&ap
->ap_atomic
, 3);
110 case SPLAT_ATOMIC_ADD_64_NV
:
111 atomic_add_64_nv(&ap
->ap_atomic
, 5);
113 case SPLAT_ATOMIC_SUB_64_NV
:
114 atomic_sub_64_nv(&ap
->ap_atomic
, 5);
117 PANIC("Undefined op %d\n", op
);
121 atomic_inc_64(&ap
->ap_atomic_exited
);
123 splat_vprint(ap
->ap_file
, SPLAT_ATOMIC_TEST1_NAME
,
124 "Thread %d successfully exited: %lu/%lu\n", op
,
125 (long unsigned)ap
->ap_atomic
,
126 (long unsigned)ap
->ap_atomic_exited
);
128 wake_up(&ap
->ap_waitq
);
133 splat_atomic_test1_cond(atomic_priv_t
*ap
, int started
)
135 return (ap
->ap_atomic_exited
== started
);
139 splat_atomic_test1(struct file
*file
, void *arg
)
146 ap
.ap_magic
= SPLAT_ATOMIC_TEST_MAGIC
;
148 mutex_init(&ap
.ap_lock
, SPLAT_ATOMIC_TEST1_NAME
, NULL
, NULL
);
149 init_waitqueue_head(&ap
.ap_waitq
);
150 ap
.ap_atomic
= SPLAT_ATOMIC_INIT_VALUE
;
151 ap
.ap_atomic_exited
= 0;
153 for (i
= 0; i
< SPLAT_ATOMIC_COUNT_64
; i
++) {
154 mutex_enter(&ap
.ap_lock
);
157 thr
= (kthread_t
*)thread_create(NULL
, 0, splat_atomic_work
,
162 mutex_exit(&ap
.ap_lock
);
166 /* Prepare to wait, the new thread will wake us once it
167 * has made a copy of the unique private passed data */
168 prepare_to_wait(&ap
.ap_waitq
, &wait
, TASK_UNINTERRUPTIBLE
);
169 mutex_exit(&ap
.ap_lock
);
173 wait_event(ap
.ap_waitq
, splat_atomic_test1_cond(&ap
, i
));
176 splat_vprint(file
, SPLAT_ATOMIC_TEST1_NAME
, "Only started "
177 "%d/%d test threads\n", i
, SPLAT_ATOMIC_COUNT_64
);
181 if (ap
.ap_atomic
!= SPLAT_ATOMIC_INIT_VALUE
) {
182 splat_vprint(file
, SPLAT_ATOMIC_TEST1_NAME
,
183 "Final value %lu does not match initial value %lu\n",
184 (long unsigned)ap
.ap_atomic
, SPLAT_ATOMIC_INIT_VALUE
);
188 splat_vprint(file
, SPLAT_ATOMIC_TEST1_NAME
,
189 "Success initial and final values match, %lu == %lu\n",
190 (long unsigned)ap
.ap_atomic
, SPLAT_ATOMIC_INIT_VALUE
);
192 mutex_destroy(&ap
.ap_lock
);
198 splat_atomic_init(void)
200 splat_subsystem_t
*sub
;
202 sub
= kmalloc(sizeof(*sub
), GFP_KERNEL
);
206 memset(sub
, 0, sizeof(*sub
));
207 strncpy(sub
->desc
.name
, SPLAT_ATOMIC_NAME
, SPLAT_NAME_SIZE
);
208 strncpy(sub
->desc
.desc
, SPLAT_ATOMIC_DESC
, SPLAT_DESC_SIZE
);
209 INIT_LIST_HEAD(&sub
->subsystem_list
);
210 INIT_LIST_HEAD(&sub
->test_list
);
211 spin_lock_init(&sub
->test_lock
);
212 sub
->desc
.id
= SPLAT_SUBSYSTEM_ATOMIC
;
214 SPLAT_TEST_INIT(sub
, SPLAT_ATOMIC_TEST1_NAME
, SPLAT_ATOMIC_TEST1_DESC
,
215 SPLAT_ATOMIC_TEST1_ID
, splat_atomic_test1
);
221 splat_atomic_fini(splat_subsystem_t
*sub
)
224 SPLAT_TEST_FINI(sub
, SPLAT_ATOMIC_TEST1_ID
);
230 splat_atomic_id(void) {
231 return SPLAT_SUBSYSTEM_ATOMIC
;