aio_kqueue_test.c revision 296277
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: head/tests/sys/aio/aio_kqueue_test.c 296277 2016-03-01 18:12:14Z jhb $ 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#include "freebsd_test_suite/macros.h" 50#include "local.h" 51 52#define PATH_TEMPLATE "aio.XXXXXXXXXX" 53 54#define MAX_IOCBS 128 55#define MAX_RUNS 300 56/* #define DEBUG */ 57 58int 59main (int argc, char *argv[]) 60{ 61 struct aiocb *iocb[MAX_IOCBS], *kq_iocb; 62 char *file, pathname[sizeof(PATH_TEMPLATE)+1]; 63 struct kevent ke, kq_returned; 64 struct timespec ts; 65 char buffer[32768]; 66#ifdef DEBUG 67 int cancel, error; 68#endif 69 int failed = 0, fd, kq, pending, result, run; 70 int tmp_file = 0; 71 unsigned i, j; 72 73 PLAIN_REQUIRE_KERNEL_MODULE("aio", 0); 74 PLAIN_REQUIRE_UNSAFE_AIO(0); 75 76 kq = kqueue(); 77 if (kq < 0) { 78 perror("No kqeueue\n"); 79 exit(1); 80 } 81 82 if (argc == 1) { 83 strcpy(pathname, PATH_TEMPLATE); 84 fd = mkstemp(pathname); 85 file = pathname; 86 tmp_file = 1; 87 } else { 88 file = argv[1]; 89 fd = open(file, O_RDWR|O_CREAT, 0666); 90 } 91 if (fd == -1) 92 err(1, "Can't open %s\n", file); 93 94 for (run = 0; run < MAX_RUNS; run++){ 95#ifdef DEBUG 96 printf("Run %d\n", run); 97#endif 98 for (i = 0; i < nitems(iocb); i++) { 99 iocb[i] = (struct aiocb *)calloc(1, 100 sizeof(struct aiocb)); 101 if (iocb[i] == NULL) 102 err(1, "calloc"); 103 } 104 105 pending = 0; 106 for (i = 0; i < nitems(iocb); i++) { 107 pending++; 108 iocb[i]->aio_nbytes = sizeof(buffer); 109 iocb[i]->aio_buf = buffer; 110 iocb[i]->aio_fildes = fd; 111 iocb[i]->aio_offset = iocb[i]->aio_nbytes * i * run; 112 113 iocb[i]->aio_sigevent.sigev_notify_kqueue = kq; 114 iocb[i]->aio_sigevent.sigev_value.sival_ptr = iocb[i]; 115 iocb[i]->aio_sigevent.sigev_notify = SIGEV_KEVENT; 116 117 result = aio_write(iocb[i]); 118 if (result != 0) { 119 perror("aio_write"); 120 printf("Result %d iteration %d\n", result, i); 121 exit(1); 122 } 123#ifdef DEBUG 124 printf("WRITE %d is at %p\n", i, iocb[i]); 125#endif 126 result = rand(); 127 if (result < RAND_MAX/32) { 128 if (result > RAND_MAX/64) { 129 result = aio_cancel(fd, iocb[i]); 130#ifdef DEBUG 131 printf("Cancel %d %p result %d\n", i, iocb[i], result); 132#endif 133 if (result == AIO_CANCELED) { 134 aio_return(iocb[i]); 135 iocb[i] = NULL; 136 pending--; 137 } 138 } 139 } 140 } 141#ifdef DEBUG 142 cancel = nitems(iocb) - pending; 143#endif 144 145 i = 0; 146 while (pending) { 147 148 for (;;) { 149 150 bzero(&ke, sizeof(ke)); 151 bzero(&kq_returned, sizeof(ke)); 152 ts.tv_sec = 0; 153 ts.tv_nsec = 1; 154 result = kevent(kq, NULL, 0, 155 &kq_returned, 1, &ts); 156#ifdef DEBUG 157 error = errno; 158#endif 159 if (result < 0) 160 perror("kevent error: "); 161 kq_iocb = kq_returned.udata; 162#ifdef DEBUG 163 printf("kevent %d %d errno %d return.ident %p " 164 "return.data %p return.udata %p %p\n", 165 i, result, error, 166 kq_returned.ident, kq_returned.data, 167 kq_returned.udata, 168 kq_iocb); 169#endif 170 171 if (kq_iocb) 172 break; 173#ifdef DEBUG 174 printf("Try again left %d out of %d %d\n", 175 pending, nitems(iocb), cancel); 176#endif 177 } 178 179 for (j = 0; j < nitems(iocb) && iocb[j] != kq_iocb; 180 j++) ; 181#ifdef DEBUG 182 printf("kq_iocb %p\n", kq_iocb); 183 184 printf("Error Result for %d is %d pending %d\n", 185 j, result, pending); 186#endif 187 result = aio_return(kq_iocb); 188#ifdef DEBUG 189 printf("Return Result for %d is %d\n\n", j, result); 190#endif 191 if (result != sizeof(buffer)) { 192 printf("FAIL: run %d, operation %d, result %d " 193 " (errno=%d) should be %zu\n", run, pending, 194 result, errno, sizeof(buffer)); 195 failed++; 196 } else 197 printf("PASS: run %d, left %d\n", run, 198 pending - 1); 199 200 free(kq_iocb); 201 iocb[j] = NULL; 202 pending--; 203 i++; 204 } 205 206 for (i = 0; i < nitems(iocb); i++) 207 free(iocb[i]); 208 209 } 210 211 if (tmp_file) 212 unlink(pathname); 213 214 if (failed != 0) 215 printf("FAIL: %d tests failed\n", failed); 216 else 217 printf("PASS: All tests passed\n"); 218 219 exit (failed == 0 ? 0 : 1); 220} 221