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