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 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 126 cleanup(void) 127 { 128 } 129 130 int 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