Subversion Repositories HelenOS

Rev

Rev 2216 | Rev 3424 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
1 jermar 1
/*
2071 jermar 2
 * Copyright (c) 2001-2004 Jakub Jermar
1 jermar 3
 * All rights reserved.
4
 *
5
 * Redistribution and use in source and binary forms, with or without
6
 * modification, are permitted provided that the following conditions
7
 * are met:
8
 *
9
 * - Redistributions of source code must retain the above copyright
10
 *   notice, this list of conditions and the following disclaimer.
11
 * - Redistributions in binary form must reproduce the above copyright
12
 *   notice, this list of conditions and the following disclaimer in the
13
 *   documentation and/or other materials provided with the distribution.
14
 * - The name of the author may not be used to endorse or promote products
15
 *   derived from this software without specific prior written permission.
16
 *
17
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
 */
28
 
29
#include <test.h>
30
#include <arch.h>
1104 jermar 31
#include <atomic.h>
1 jermar 32
#include <print.h>
33
#include <proc/thread.h>
34
#include <arch/types.h>
35
#include <arch/context.h>
205 jermar 36
#include <context.h>
1 jermar 37
 
38
#include <synch/waitq.h>
39
#include <synch/rwlock.h>
40
#include <synch/synch.h>
623 jermar 41
#include <synch/spinlock.h>
1 jermar 42
 
43
#define READERS     50
44
#define WRITERS     50
45
 
2053 decky 46
static atomic_t thread_count;
1 jermar 47
static rwlock_t rwlock;
2029 decky 48
static atomic_t threads_fault;
2053 decky 49
static bool sh_quiet;
1 jermar 50
 
2024 decky 51
SPINLOCK_INITIALIZE(rw_lock);
1 jermar 52
 
53
static waitq_t can_start;
54
 
2022 decky 55
static uint32_t seed = 0xdeadbeef;
1 jermar 56
 
2022 decky 57
static uint32_t random(uint32_t max)
1 jermar 58
{
1780 jermar 59
    uint32_t rc;
1 jermar 60
 
2024 decky 61
    spinlock_lock(&rw_lock);   
1 jermar 62
    rc = seed % max;
63
    seed = (((seed<<2) ^ (seed>>2)) * 487) + rc;
2024 decky 64
    spinlock_unlock(&rw_lock);
1 jermar 65
    return rc;
66
}
67
 
2022 decky 68
static void writer(void *arg)
1 jermar 69
{
70
    int rc, to;
1658 vana 71
    thread_detach(THREAD);
1 jermar 72
    waitq_sleep(&can_start);
73
 
74
    to = random(40000);
2053 decky 75
 
76
    if (!sh_quiet)
2216 decky 77
        printf("cpu%d, tid %llu w+ (%d)\n", CPU->id, THREAD->tid, to);
2053 decky 78
 
1 jermar 79
    rc = rwlock_write_lock_timeout(&rwlock, to);
80
    if (SYNCH_FAILED(rc)) {
2053 decky 81
        if (!sh_quiet)
2216 decky 82
            printf("cpu%d, tid %llu w!\n", CPU->id, THREAD->tid);
2053 decky 83
        atomic_dec(&thread_count);
1 jermar 84
        return;
2028 decky 85
    }
2053 decky 86
 
87
    if (!sh_quiet)
2216 decky 88
        printf("cpu%d, tid %llu w=\n", CPU->id, THREAD->tid);
1 jermar 89
 
2029 decky 90
    if (rwlock.readers_in) {
2053 decky 91
        if (!sh_quiet)
92
            printf("Oops.");
2029 decky 93
        atomic_inc(&threads_fault);
2053 decky 94
        atomic_dec(&thread_count);
2029 decky 95
        return;
96
    }
1 jermar 97
    thread_usleep(random(1000000));
2029 decky 98
    if (rwlock.readers_in) {
2053 decky 99
        if (!sh_quiet)
100
            printf("Oops.");   
2029 decky 101
        atomic_inc(&threads_fault);
2053 decky 102
        atomic_dec(&thread_count);
2029 decky 103
        return;
104
    }
1 jermar 105
 
106
    rwlock_write_unlock(&rwlock);
2053 decky 107
 
108
    if (!sh_quiet)
2216 decky 109
        printf("cpu%d, tid %llu w-\n", CPU->id, THREAD->tid);
2053 decky 110
    atomic_dec(&thread_count);
1 jermar 111
}
112
 
2022 decky 113
static void reader(void *arg)
1 jermar 114
{
115
    int rc, to;
1658 vana 116
    thread_detach(THREAD);
1 jermar 117
    waitq_sleep(&can_start);
118
 
119
    to = random(2000);
2053 decky 120
 
121
    if (!sh_quiet)
2216 decky 122
        printf("cpu%d, tid %llu r+ (%d)\n", CPU->id, THREAD->tid, to);
2053 decky 123
 
1 jermar 124
    rc = rwlock_read_lock_timeout(&rwlock, to);
125
    if (SYNCH_FAILED(rc)) {
2053 decky 126
        if (!sh_quiet)
2216 decky 127
            printf("cpu%d, tid %llu r!\n", CPU->id, THREAD->tid);
2053 decky 128
        atomic_dec(&thread_count);
1 jermar 129
        return;
130
    }
2053 decky 131
 
132
    if (!sh_quiet)
2216 decky 133
        printf("cpu%d, tid %llu r=\n", CPU->id, THREAD->tid);
2053 decky 134
 
1 jermar 135
    thread_usleep(30000);
136
    rwlock_read_unlock(&rwlock);
2053 decky 137
 
138
    if (!sh_quiet)
2216 decky 139
        printf("cpu%d, tid %llu r-\n", CPU->id, THREAD->tid);
2053 decky 140
    atomic_dec(&thread_count);
1 jermar 141
}
142
 
2050 decky 143
char * test_rwlock4(bool quiet)
1 jermar 144
{
145
    context_t ctx;
2053 decky 146
    uint32_t i;
147
    sh_quiet = quiet;
1 jermar 148
 
149
    waitq_initialize(&can_start);
150
    rwlock_initialize(&rwlock);
2029 decky 151
    atomic_set(&threads_fault, 0);
1 jermar 152
 
2053 decky 153
    uint32_t rd = random(7) + 1;
154
    uint32_t wr = random(5) + 1;
155
 
156
    atomic_set(&thread_count, rd + wr);
157
 
2028 decky 158
    thread_t *thrd;
159
 
160
    context_save(&ctx);
2053 decky 161
    if (!quiet) {
162
        printf("sp=%#x, readers_in=%d\n", ctx.sp, rwlock.readers_in);
163
        printf("Creating %d readers\n", rd);
164
    }
2028 decky 165
 
2053 decky 166
    for (i = 0; i < rd; i++) {
2042 decky 167
        thrd = thread_create(reader, NULL, TASK, 0, "reader", false);
2028 decky 168
        if (thrd)
169
            thread_ready(thrd);
2053 decky 170
        else if (!quiet)
2028 decky 171
            printf("Could not create reader %d\n", i);
172
    }
1 jermar 173
 
2053 decky 174
    if (!quiet)
175
        printf("Creating %d writers\n", wr);
176
 
177
    for (i = 0; i < wr; i++) {
2042 decky 178
        thrd = thread_create(writer, NULL, TASK, 0, "writer", false);
2028 decky 179
        if (thrd)
180
            thread_ready(thrd);
2053 decky 181
        else if (!quiet)
2028 decky 182
            printf("Could not create writer %d\n", i);
183
    }
184
 
185
    thread_usleep(20000);
186
    waitq_wakeup(&can_start, WAKEUP_ALL);
187
 
2053 decky 188
    while (atomic_get(&thread_count) > 0) {
189
        if (!quiet)
190
            printf("Threads left: %d\n", atomic_get(&thread_count));
191
        thread_sleep(1);
192
    }
193
 
2029 decky 194
    if (atomic_get(&threads_fault) == 0)
195
        return NULL;
196
 
197
    return "Test failed";
1 jermar 198
}