aio_kqueue_test.c revision 293140
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: stable/10/tests/sys/aio/aio_kqueue_test.c 293140 2016-01-04 07:02:48Z ngie $ 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 51#define PATH_TEMPLATE "aio.XXXXXXXXXX" 52 53#define MAX_IOCBS 128 54#define MAX_RUNS 300 55/* #define DEBUG */ 56 57int 58main (int argc, char *argv[]) 59{ 60 struct aiocb *iocb[MAX_IOCBS], *kq_iocb; 61 char *file, pathname[sizeof(PATH_TEMPLATE)+1]; 62 struct kevent ke, kq_returned; 63 struct timespec ts; 64 char buffer[32768]; 65#ifdef DEBUG 66 int cancel, error; 67#endif 68 int failed = 0, fd, kq, pending, result, run; 69 int tmp_file = 0; 70 unsigned i, j; 71 72 PLAIN_REQUIRE_KERNEL_MODULE("aio", 0); 73 74 kq = kqueue(); 75 if (kq < 0) { 76 perror("No kqeueue\n"); 77 exit(1); 78 } 79 80 if (argc == 1) { 81 strcpy(pathname, PATH_TEMPLATE); 82 fd = mkstemp(pathname); 83 file = pathname; 84 tmp_file = 1; 85 } else { 86 file = argv[1]; 87 fd = open(file, O_RDWR|O_CREAT, 0666); 88 } 89 if (fd == -1) 90 err(1, "Can't open %s\n", file); 91 92 for (run = 0; run < MAX_RUNS; run++){ 93#ifdef DEBUG 94 printf("Run %d\n", run); 95#endif 96 for (i = 0; i < nitems(iocb); i++) { 97 iocb[i] = (struct aiocb *)calloc(1, 98 sizeof(struct aiocb)); 99 if (iocb[i] == NULL) 100 err(1, "calloc"); 101 } 102 103 pending = 0; 104 for (i = 0; i < nitems(iocb); i++) { 105 pending++; 106 iocb[i]->aio_nbytes = sizeof(buffer); 107 iocb[i]->aio_buf = buffer; 108 iocb[i]->aio_fildes = fd; 109 iocb[i]->aio_offset = iocb[i]->aio_nbytes * i * run; 110 111 iocb[i]->aio_sigevent.sigev_notify_kqueue = kq; 112 iocb[i]->aio_sigevent.sigev_value.sival_ptr = iocb[i]; 113 iocb[i]->aio_sigevent.sigev_notify = SIGEV_KEVENT; 114 115 result = aio_write(iocb[i]); 116 if (result != 0) { 117 perror("aio_write"); 118 printf("Result %d iteration %d\n", result, i); 119 exit(1); 120 } 121#ifdef DEBUG 122 printf("WRITE %d is at %p\n", i, iocb[i]); 123#endif 124 result = rand(); 125 if (result < RAND_MAX/32) { 126 if (result > RAND_MAX/64) { 127 result = aio_cancel(fd, iocb[i]); 128#ifdef DEBUG 129 printf("Cancel %d %p result %d\n", i, iocb[i], result); 130#endif 131 if (result == AIO_CANCELED) { 132 aio_return(iocb[i]); 133 iocb[i] = NULL; 134 pending--; 135 } 136 } 137 } 138 } 139#ifdef DEBUG 140 cancel = nitems(iocb) - pending; 141#endif 142 143 i = 0; 144 while (pending) { 145 146 for (;;) { 147 148 bzero(&ke, sizeof(ke)); 149 bzero(&kq_returned, sizeof(ke)); 150 ts.tv_sec = 0; 151 ts.tv_nsec = 1; 152 result = kevent(kq, NULL, 0, 153 &kq_returned, 1, &ts); 154#ifdef DEBUG 155 error = errno; 156#endif 157 if (result < 0) 158 perror("kevent error: "); 159 kq_iocb = kq_returned.udata; 160#ifdef DEBUG 161 printf("kevent %d %d errno %d return.ident %p " 162 "return.data %p return.udata %p %p\n", 163 i, result, error, 164 kq_returned.ident, kq_returned.data, 165 kq_returned.udata, 166 kq_iocb); 167#endif 168 169 if (kq_iocb) 170 break; 171#ifdef DEBUG 172 printf("Try again left %d out of %d %d\n", 173 pending, nitems(iocb), cancel); 174#endif 175 } 176 177 for (j = 0; j < nitems(iocb) && iocb[j] != kq_iocb; 178 j++) ; 179#ifdef DEBUG 180 printf("kq_iocb %p\n", kq_iocb); 181 182 printf("Error Result for %d is %d pending %d\n", 183 j, result, pending); 184#endif 185 result = aio_return(kq_iocb); 186#ifdef DEBUG 187 printf("Return Result for %d is %d\n\n", j, result); 188#endif 189 if (result != sizeof(buffer)) { 190 printf("FAIL: run %d, operation %d, result %d " 191 " (errno=%d) should be %zu\n", run, pending, 192 result, errno, sizeof(buffer)); 193 failed++; 194 } else 195 printf("PASS: run %d, left %d\n", run, 196 pending - 1); 197 198 free(kq_iocb); 199 iocb[j] = NULL; 200 pending--; 201 i++; 202 } 203 204 for (i = 0; i < nitems(iocb); i++) 205 free(iocb[i]); 206 207 } 208 209 if (tmp_file) 210 unlink(pathname); 211 212 if (failed != 0) 213 printf("FAIL: %d tests failed\n", failed); 214 else 215 printf("PASS: All tests passed\n"); 216 217 exit (failed == 0 ? 0 : 1); 218} 219