1 /*-
2 * Copyright (c) 2008 Peter Holm <pho@FreeBSD.org>
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 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 */
27
28 #include <sys/types.h>
29 #include <sys/resource.h>
30 #include <sys/sysctl.h>
31 #include <sys/time.h>
32
33 #include <err.h>
34 #include <stdio.h>
35 #include <stdlib.h>
36 #include <unistd.h>
37
38 #include "stress.h"
39
40 #if defined(__LP64__)
41 #define MINLEFT (1792LL * 1024 * 1024)
42 #else
43 #define MINLEFT (1024LL * 1024 * 1024)
44 #endif
45
46 static int64_t size;
47
48 int
setup(int nb)49 setup(int nb)
50 {
51 struct rlimit rlp;
52 int64_t mem, swapinfo;
53 int mi, mx, pct;
54 char *cp;
55
56 if (nb == 0) {
57 mem = usermem();
58 swapinfo = swap();
59
60 pct = 0;
61 if (op->hog == 0) {
62 mi = 80;
63 mx = 100;
64 }
65
66 if (op->hog == 1) {
67 mi = 100;
68 mx = 110;
69 }
70
71 if (op->hog == 2) {
72 mi = 110;
73 mx = 120;
74 }
75
76 if (op->hog >= 3) {
77 mi = 120;
78 mx = 130;
79 }
80 if ((cp = getenv("MAXSWAPPCT")) != NULL && *cp != '\0') {
81 mx = atoi(cp);
82 mi = mx - 10;
83 }
84 pct = random_int(mi, mx);
85
86 if (swapinfo == 0) {
87 pct = random_int(30, 50);
88 if (mem <= MINLEFT) {
89 putval(0);
90 _exit(1);
91 }
92 mem -= MINLEFT;
93 size = mem / 100 * pct;
94 } else {
95 size = mem / 100 * pct;
96 if (size > mem + swapinfo / 4) {
97 size = mem + swapinfo / 4;
98 pct = size * 100 / mem;
99 }
100 }
101
102 size = size / op->incarnations;
103
104 if (getrlimit(RLIMIT_DATA, &rlp) < 0)
105 err(1,"getrlimit");
106 rlp.rlim_cur -= 1024 * 1024;
107
108 if (size > rlp.rlim_cur)
109 size = rlp.rlim_cur;
110 putval(size);
111
112 if (op->verbose > 1 && nb == 0)
113 printf("setup: pid %d, %d%%. Total %dMb, %d thread(s).\n",
114 getpid(), pct, (int)(size / 1024 / 1024 *
115 op->incarnations), op->incarnations);
116 } else
117 size = getval();
118
119 if (size == 0)
120 exit(1);
121
122 return (0);
123 }
124
125 void
cleanup(void)126 cleanup(void)
127 {
128 }
129
130 int
test(void)131 test(void)
132 {
133 time_t start;
134 int64_t i, oldsize;
135 int page;
136 char *c;
137
138 if (size == 0)
139 return (0);
140 oldsize = size;
141 c = malloc(size);
142 while (c == NULL && done_testing == 0) {
143 size -= 1024 * 1024;
144 c = malloc(size);
145 }
146 if (op->verbose > 1 && size != oldsize)
147 printf("Malloc size changed from %d Mb to %d Mb\n",
148 (int)(oldsize / 1024 / 1024), (int)(size / 1024 / 102));
149 page = getpagesize();
150 start = time(NULL); /* Livelock workaround */
151 while (done_testing == 0 &&
152 (time(NULL) - start) < op->run_time) {
153 i = 0;
154 while (i < size && done_testing == 0) {
155 c[i] = 0;
156 i += page;
157 }
158 if (arc4random() % 100 < 10)
159 usleep(10000);
160 }
161 free((void *)c);
162
163 return (0);
164 }
165