1 /* 2 * Copyright (c) 2002 Adrian Chadd <adrian@FreeBSD.org>. 3 * All rights reserved. 4 * 5 * This software was developed for the FreeBSD Project by Marshall 6 * Kirk McKusick and Network Associates Laboratories, the Security 7 * Research Division of Network Associates, Inc. under DARPA/SPAWAR 8 * contract N66001-01-C-8035 ("CBOSS"), as part of the DARPA CHATS 9 * research program. 10 * 11 * Copyright (c) 1980, 1989, 1993 12 * The Regents of the University of California. All rights reserved. 13 * 14 * Redistribution and use in source and binary forms, with or without 15 * modification, are permitted provided that the following conditions 16 * are met: 17 * 1. Redistributions of source code must retain the above copyright 18 * notice, this list of conditions and the following disclaimer. 19 * 2. Redistributions in binary form must reproduce the above copyright 20 * notice, this list of conditions and the following disclaimer in the 21 * documentation and/or other materials provided with the distribution. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 */ 38 39 #include <sys/cdefs.h> 40 __FBSDID("$FreeBSD$"); 41 42 #include <stdint.h> 43 #include <stdio.h> 44 #include <stdlib.h> 45 #include <unistd.h> 46 #include <sys/time.h> 47 #include <sys/types.h> 48 #include <sys/stat.h> 49 #include <time.h> 50 #include <sys/ioctl.h> 51 #include <sys/disk.h> 52 #include <aio.h> 53 #include <fcntl.h> 54 #include <string.h> 55 #include <ctype.h> 56 #include <assert.h> 57 58 /* 59 * This is a bit of a quick hack to do parallel IO testing through POSIX AIO. 60 * Its specifically designed to work under FreeBSD and its derivatives; 61 * note how I cheat by using aio_waitcomplete(). 62 * 63 * TODO: 64 * 65 * + Add write support; so we can make sure we're not hitting throughput issues 66 * with read/modify/write of entire tracks of the disk 67 * + Add in per-op stats - time and offset - so one could start mapping out 68 * the speed hotspots of the disk 69 * + Add in different distributions - random, normal, left/right skewed normal, 70 * zipf, etc - and perhaps add the ability to run concurrent distributions 71 * (so a normal and a zipf; and also a random read; zipf write, etc.) 72 * 73 * Adrian Chadd <adrian@creative.net.au> 74 */ 75 76 typedef enum { 77 IOT_NONE = 0x00, 78 IOT_READ = 0x01, 79 IOT_WRITE = 0x02 80 } iot_t; 81 82 static size_t 83 disk_getsize(int fd) 84 { 85 off_t mediasize; 86 87 if (ioctl(fd, DIOCGMEDIASIZE, &mediasize) < 0) { 88 perror("ioctl(DIOCGMEDIASIZE)"); 89 exit(1); 90 } 91 return mediasize; 92 } 93 94 iot_t 95 choose_aio(iot_t iomask) 96 { 97 /* choose a random read or write event, limited by the mask */ 98 if (iomask == IOT_READ) 99 return IOT_READ; 100 else if (iomask == IOT_WRITE) 101 return IOT_WRITE; 102 return (random() & 0x01 ? IOT_READ : IOT_WRITE); 103 } 104 105 void 106 set_aio(struct aiocb *a, iot_t iot, int fd, off_t offset, int size, char *buf) 107 { 108 int r; 109 bzero(a, sizeof(*a)); 110 a->aio_fildes = fd; 111 a->aio_nbytes = size; 112 a->aio_offset = offset; 113 a->aio_buf = buf; 114 if (iot == IOT_READ) 115 r = aio_read(a); 116 else 117 r = aio_write(a); 118 if (r != 0) { 119 perror("set_aio"); 120 exit(1); 121 } 122 } 123 124 int 125 main(int argc, char *argv[]) 126 { 127 int fd; 128 struct stat sb; 129 struct aiocb *aio; 130 char **abuf; 131 const char *fn; 132 int aio_len; 133 int io_size, nrun; 134 off_t file_size, offset; 135 struct aiocb *a; 136 int i, n; 137 struct timeval st, et, rt; 138 float f_rt; 139 iot_t iowhat; 140 141 142 if (argc < 6) { 143 printf("Usage: %s <file> <io size> <number of runs> <concurrency> <ro|wo|rw>\n", argv[0]); 144 exit(1); 145 } 146 147 fn = argv[1]; 148 io_size = atoi(argv[2]); 149 nrun = atoi(argv[3]); 150 aio_len = atoi(argv[4]); 151 if (strcmp(argv[5], "ro") == 0) { 152 iowhat = IOT_READ; 153 } else if (strcmp(argv[5], "rw") == 0) { 154 iowhat = IOT_READ | IOT_WRITE; 155 } else if (strcmp(argv[5], "wo") == 0) { 156 iowhat = IOT_WRITE; 157 } else { 158 fprintf(stderr, "needs to be ro, rw, wo!\n"); 159 exit(1); 160 } 161 162 /* 163 * Random returns values between 0 and (2^32)-1; only good for 4 gig. 164 * Lets instead treat random() as returning a block offset w/ block size 165 * being "io_size", so we can handle > 4 gig files. 166 */ 167 if (iowhat == IOT_READ) 168 fd = open(fn, O_RDONLY | O_DIRECT); 169 else if (iowhat == IOT_WRITE) 170 fd = open(fn, O_WRONLY | O_DIRECT); 171 else 172 fd = open(fn, O_RDWR | O_DIRECT); 173 174 if (fd < 0) { 175 perror("open"); 176 exit(1); 177 } 178 if (fstat(fd, &sb) < 0) { 179 perror("fstat"); 180 exit(1); 181 } 182 if (S_ISREG(sb.st_mode)) { 183 file_size = sb.st_size; 184 } else if (S_ISBLK(sb.st_mode) || S_ISCHR(sb.st_mode)) { 185 file_size = disk_getsize(fd); 186 } else { 187 perror("unknown file type\n"); 188 exit(1); 189 } 190 printf("File: %s; File size %jd bytes\n", fn, (intmax_t)file_size); 191 192 aio = calloc(aio_len, sizeof(struct aiocb)); 193 abuf = calloc(aio_len, sizeof(char *)); 194 for (i = 0; i < aio_len; i++) { 195 abuf[i] = calloc(1, io_size * sizeof(char)); 196 } 197 198 /* Fill with the initial contents */ 199 gettimeofday(&st, NULL); 200 for (i = 0; i < aio_len; i++) { 201 offset = random() % (file_size / io_size); 202 offset *= io_size; 203 set_aio(aio + i, choose_aio(iowhat), fd, offset, io_size, abuf[i]); 204 } 205 206 for (i = 0; i < nrun; i++) { 207 aio_waitcomplete(&a, NULL); 208 n = a - aio; 209 assert(n < aio_len); 210 assert(n >= 0); 211 offset = random() % (file_size / io_size); 212 offset *= io_size; 213 set_aio(aio + n, choose_aio(iowhat), fd, offset, io_size, abuf[n]); 214 } 215 216 gettimeofday(&et, NULL); 217 timersub(&et, &st, &rt); 218 f_rt = ((float) (rt.tv_usec)) / 1000000.0; 219 f_rt += (float) (rt.tv_sec); 220 printf("Runtime: %.2f seconds, ", f_rt); 221 printf("Op rate: %.2f ops/sec, ", ((float) (nrun)) / f_rt); 222 printf("Avg transfer rate: %.2f bytes/sec\n", ((float) (nrun)) * ((float)io_size) / f_rt); 223 224 225 226 exit(0); 227 } 228