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/*
* 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/cdefs.h>
__FBSDID("$FreeBSD$");
#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);
}
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