1 /*- 2 * Copyright (C) 2005 IronPort Systems, Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23 * SUCH DAMAGE. 24 * 25 * $FreeBSD$ 26 */ 27 28 /* 29 * Prerequisities: 30 * - AIO support must be compiled into the kernel (see sys/<arch>/NOTES for 31 * more details). 32 * 33 * Note: it is a good idea to run this against a physical drive to 34 * exercise the physio fast path (ie. aio_kqueue /dev/<something safe>) 35 */ 36 37 #include <sys/types.h> 38 #include <sys/event.h> 39 #include <sys/time.h> 40 #include <aio.h> 41 #include <err.h> 42 #include <errno.h> 43 #include <fcntl.h> 44 #include <stdlib.h> 45 #include <stdio.h> 46 #include <string.h> 47 #include <unistd.h> 48 49 #define PATH_TEMPLATE "/tmp/aio.XXXXXXXXXX" 50 51 #define MAX 128 52 #define MAX_RUNS 300 53 /* #define DEBUG */ 54 55 int 56 main (int argc, char *argv[]) 57 { 58 int fd; 59 struct aiocb *iocb[MAX], *kq_iocb; 60 int i, result, run, error, j; 61 char buffer[32768]; 62 int kq = kqueue(); 63 struct kevent ke, kq_returned; 64 struct timespec ts; 65 int cancel, pending, tmp_file = 0, failed = 0; 66 char *file, pathname[sizeof(PATH_TEMPLATE)+1]; 67 68 if (kq < 0) { 69 perror("No kqeueue\n"); 70 exit(1); 71 } 72 73 if (argc == 1) { 74 strcpy(pathname, PATH_TEMPLATE); 75 fd = mkstemp(pathname); 76 file = pathname; 77 tmp_file = 1; 78 } else { 79 file = argv[1]; 80 fd = open(file, O_RDWR|O_CREAT, 0666); 81 } 82 if (fd == -1) 83 err(1, "Can't open %s\n", file); 84 85 for (run = 0; run < MAX_RUNS; run++){ 86 #ifdef DEBUG 87 printf("Run %d\n", run); 88 #endif 89 for (i = 0; i < MAX; i++) { 90 iocb[i] = (struct aiocb *)calloc(1, 91 sizeof(struct aiocb)); 92 if (iocb[i] == NULL) 93 err(1, "calloc"); 94 } 95 96 pending = 0; 97 for (i = 0; i < MAX; i++) { 98 pending++; 99 iocb[i]->aio_nbytes = sizeof(buffer); 100 iocb[i]->aio_buf = buffer; 101 iocb[i]->aio_fildes = fd; 102 iocb[i]->aio_offset = iocb[i]->aio_nbytes * i * run; 103 104 iocb[i]->aio_sigevent.sigev_notify_kqueue = kq; 105 iocb[i]->aio_sigevent.sigev_value.sival_ptr = iocb[i]; 106 iocb[i]->aio_sigevent.sigev_notify = SIGEV_KEVENT; 107 108 result = aio_write(iocb[i]); 109 if (result != 0) { 110 perror("aio_write"); 111 printf("Result %d iteration %d\n", result, i); 112 exit(1); 113 } 114 #ifdef DEBUG 115 printf("WRITE %d is at %p\n", i, iocb[i]); 116 #endif 117 result = rand(); 118 if (result < RAND_MAX/32) { 119 if (result > RAND_MAX/64) { 120 result = aio_cancel(fd, iocb[i]); 121 #ifdef DEBUG 122 printf("Cancel %d %p result %d\n", i, iocb[i], result); 123 #endif 124 if (result == AIO_CANCELED) { 125 aio_return(iocb[i]); 126 iocb[i] = NULL; 127 pending--; 128 } 129 } 130 } 131 } 132 cancel = MAX - pending; 133 134 i = 0; 135 while (pending) { 136 137 for (;;) { 138 139 bzero(&ke, sizeof(ke)); 140 bzero(&kq_returned, sizeof(ke)); 141 ts.tv_sec = 0; 142 ts.tv_nsec = 1; 143 result = kevent(kq, NULL, 0, 144 &kq_returned, 1, &ts); 145 error = errno; 146 if (result < 0) 147 perror("kevent error: "); 148 kq_iocb = kq_returned.udata; 149 #ifdef DEBUG 150 printf("kevent %d %d errno %d return.ident %p " 151 "return.data %p return.udata %p %p\n", 152 i, result, error, 153 kq_returned.ident, kq_returned.data, 154 kq_returned.udata, 155 kq_iocb); 156 #endif 157 158 if (kq_iocb) 159 break; 160 #ifdef DEBUG 161 printf("Try again left %d out of %d %d\n", 162 pending, MAX, cancel); 163 #endif 164 } 165 166 for (j = 0; j < MAX && iocb[j] != kq_iocb; 167 j++) ; 168 #ifdef DEBUG 169 printf("kq_iocb %p\n", kq_iocb); 170 171 printf("Error Result for %d is %d pending %d\n", 172 j, result, pending); 173 #endif 174 result = aio_return(kq_iocb); 175 #ifdef DEBUG 176 printf("Return Result for %d is %d\n\n", j, result); 177 #endif 178 if (result != sizeof(buffer)) { 179 printf("FAIL: run %d, operation %d, result %d " 180 " (errno=%d) should be %zu\n", run, pending, 181 result, errno, sizeof(buffer)); 182 failed++; 183 } else 184 printf("PASS: run %d, left %d\n", run, 185 pending - 1); 186 187 free(kq_iocb); 188 iocb[j] = NULL; 189 pending--; 190 i++; 191 } 192 193 for (i = 0; i < MAX; i++) 194 free(iocb[i]); 195 196 } 197 198 if (tmp_file) 199 unlink(pathname); 200 201 if (failed != 0) 202 printf("FAIL: %d tests failed\n", failed); 203 else 204 printf("PASS: All tests passed\n"); 205 206 exit (failed == 0 ? 0 : 1); 207 } 208