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8a16b7a18f
Mainly focus on files that use BSD 3-Clause license. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. Special thanks to Wind River for providing access to "The Duke of Highlander" tool: an older (2014) run over FreeBSD tree was useful as a starting point.
228 lines
6.5 KiB
C
228 lines
6.5 KiB
C
/*
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* SPDX-License-Identifier: BSD-3-Clause
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*
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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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* 3. 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 <sys/types.h>
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#include <sys/disk.h>
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#include <sys/ioctl.h>
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#include <sys/stat.h>
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#include <sys/time.h>
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#include <aio.h>
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#include <assert.h>
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#include <ctype.h>
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#include <err.h>
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#include <fcntl.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#include <unistd.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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err(1, "ioctl(DIOCGMEDIASIZE)");
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return (mediasize);
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}
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static 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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static 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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err(1, "set_aio call failed");
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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",
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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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if (io_size <= 0)
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errx(1, "the I/O size must be >0");
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nrun = atoi(argv[3]);
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if (nrun <= 0)
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errx(1, "the number of runs must be >0");
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aio_len = atoi(argv[4]);
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if (aio_len <= 0)
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errx(1, "AIO concurrency must be >0");
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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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errx(1, "the I/O type needs to be \"ro\", \"rw\", or \"wo\"!\n");
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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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err(1, "open failed");
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if (fstat(fd, &sb) < 0)
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err(1, "fstat failed");
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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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errx(1, "unknown file type");
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if (file_size <= 0)
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errx(1, "path provided too small");
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printf("File: %s; File size %jd bytes\n", fn, (intmax_t)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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/* 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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