/* * Copyright (c) 2002 Adrian Chadd . * 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. * 4. 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 __FBSDID("$FreeBSD$"); #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* * 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 */ 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) { perror("ioctl(DIOCGMEDIASIZE)"); exit(1); } return mediasize; } 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); } 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) { perror("set_aio"); exit(1); } } 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 \n", argv[0]); exit(1); } fn = argv[1]; io_size = atoi(argv[2]); nrun = atoi(argv[3]); aio_len = atoi(argv[4]); 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 { fprintf(stderr, "needs to be ro, rw, wo!\n"); exit(1); } /* * 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) { perror("open"); exit(1); } if (fstat(fd, &sb) < 0) { perror("fstat"); exit(1); } 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 { perror("unknown file type\n"); exit(1); } 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); }