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Diffstat (limited to 'tools/regression/aio/aiop/aiop.c')
| -rw-r--r-- | tools/regression/aio/aiop/aiop.c | 224 |
1 files changed, 224 insertions, 0 deletions
diff --git a/tools/regression/aio/aiop/aiop.c b/tools/regression/aio/aiop/aiop.c new file mode 100644 index 000000000000..4b6bc986600b --- /dev/null +++ b/tools/regression/aio/aiop/aiop.c @@ -0,0 +1,224 @@ +/* + * SPDX-License-Identifier: BSD-3-Clause + * + * Copyright (c) 2002 Adrian Chadd <adrian@FreeBSD.org>. + * All rights reserved. + * + * This software was developed for the FreeBSD Project by Marshall + * Kirk McKusick and Network Associates Laboratories, the Security + * Research Division of Network Associates, Inc. under DARPA/SPAWAR + * contract N66001-01-C-8035 ("CBOSS"), as part of the DARPA CHATS + * research program. + * + * Copyright (c) 1980, 1989, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <sys/types.h> +#include <sys/disk.h> +#include <sys/ioctl.h> +#include <sys/stat.h> +#include <sys/time.h> +#include <aio.h> +#include <assert.h> +#include <ctype.h> +#include <err.h> +#include <fcntl.h> +#include <stdint.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <time.h> +#include <unistd.h> + +/* + * This is a bit of a quick hack to do parallel IO testing through POSIX AIO. + * Its specifically designed to work under FreeBSD and its derivatives; + * note how I cheat by using aio_waitcomplete(). + * + * TODO: + * + * + Add write support; so we can make sure we're not hitting throughput issues + * with read/modify/write of entire tracks of the disk + * + Add in per-op stats - time and offset - so one could start mapping out + * the speed hotspots of the disk + * + Add in different distributions - random, normal, left/right skewed normal, + * zipf, etc - and perhaps add the ability to run concurrent distributions + * (so a normal and a zipf; and also a random read; zipf write, etc.) + * + * Adrian Chadd <adrian@creative.net.au> + */ + +typedef enum { + IOT_NONE = 0x00, + IOT_READ = 0x01, + IOT_WRITE = 0x02 +} iot_t; + +static size_t +disk_getsize(int fd) +{ + off_t mediasize; + + if (ioctl(fd, DIOCGMEDIASIZE, &mediasize) < 0) + err(1, "ioctl(DIOCGMEDIASIZE)"); + return (mediasize); +} + +static iot_t +choose_aio(iot_t iomask) +{ + /* choose a random read or write event, limited by the mask */ + if (iomask == IOT_READ) + return IOT_READ; + else if (iomask == IOT_WRITE) + return IOT_WRITE; + return (random() & 0x01 ? IOT_READ : IOT_WRITE); +} + +static void +set_aio(struct aiocb *a, iot_t iot, int fd, off_t offset, int size, char *buf) +{ + int r; + bzero(a, sizeof(*a)); + a->aio_fildes = fd; + a->aio_nbytes = size; + a->aio_offset = offset; + a->aio_buf = buf; + if (iot == IOT_READ) + r = aio_read(a); + else + r = aio_write(a); + if (r != 0) + err(1, "set_aio call failed"); +} + +int +main(int argc, char *argv[]) +{ + int fd; + struct stat sb; + struct aiocb *aio; + char **abuf; + const char *fn; + int aio_len; + int io_size, nrun; + off_t file_size, offset; + struct aiocb *a; + int i, n; + struct timeval st, et, rt; + float f_rt; + iot_t iowhat; + + + if (argc < 6) { + printf("Usage: %s <file> <io size> <number of runs> <concurrency> <ro|wo|rw>\n", + argv[0]); + exit(1); + } + + fn = argv[1]; + io_size = atoi(argv[2]); + if (io_size <= 0) + errx(1, "the I/O size must be >0"); + nrun = atoi(argv[3]); + if (nrun <= 0) + errx(1, "the number of runs must be >0"); + aio_len = atoi(argv[4]); + if (aio_len <= 0) + errx(1, "AIO concurrency must be >0"); + if (strcmp(argv[5], "ro") == 0) + iowhat = IOT_READ; + else if (strcmp(argv[5], "rw") == 0) + iowhat = IOT_READ | IOT_WRITE; + else if (strcmp(argv[5], "wo") == 0) + iowhat = IOT_WRITE; + else + errx(1, "the I/O type needs to be \"ro\", \"rw\", or \"wo\"!\n"); + + /* + * Random returns values between 0 and (2^32)-1; only good for 4 gig. + * Lets instead treat random() as returning a block offset w/ block size + * being "io_size", so we can handle > 4 gig files. + */ + if (iowhat == IOT_READ) + fd = open(fn, O_RDONLY | O_DIRECT); + else if (iowhat == IOT_WRITE) + fd = open(fn, O_WRONLY | O_DIRECT); + else + fd = open(fn, O_RDWR | O_DIRECT); + + if (fd < 0) + err(1, "open failed"); + if (fstat(fd, &sb) < 0) + err(1, "fstat failed"); + if (S_ISREG(sb.st_mode)) { + file_size = sb.st_size; + } else if (S_ISBLK(sb.st_mode) || S_ISCHR(sb.st_mode)) { + file_size = disk_getsize(fd); + } else + errx(1, "unknown file type"); + if (file_size <= 0) + errx(1, "path provided too small"); + + printf("File: %s; File size %jd bytes\n", fn, (intmax_t)file_size); + + aio = calloc(aio_len, sizeof(struct aiocb)); + abuf = calloc(aio_len, sizeof(char *)); + for (i = 0; i < aio_len; i++) + abuf[i] = calloc(1, io_size * sizeof(char)); + + /* Fill with the initial contents */ + gettimeofday(&st, NULL); + for (i = 0; i < aio_len; i++) { + offset = random() % (file_size / io_size); + offset *= io_size; + set_aio(aio + i, choose_aio(iowhat), fd, offset, io_size, abuf[i]); + } + + for (i = 0; i < nrun; i++) { + aio_waitcomplete(&a, NULL); + n = a - aio; + assert(n < aio_len); + assert(n >= 0); + offset = random() % (file_size / io_size); + offset *= io_size; + set_aio(aio + n, choose_aio(iowhat), fd, offset, io_size, abuf[n]); + } + + gettimeofday(&et, NULL); + timersub(&et, &st, &rt); + f_rt = ((float) (rt.tv_usec)) / 1000000.0; + f_rt += (float) (rt.tv_sec); + printf("Runtime: %.2f seconds, ", f_rt); + printf("Op rate: %.2f ops/sec, ", ((float) (nrun)) / f_rt); + printf("Avg transfer rate: %.2f bytes/sec\n", ((float) (nrun)) * ((float)io_size) / f_rt); + + + + exit(0); +} |