lustre/tests/mpi/cascading_rw.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  * GPL HEADER START
   5  *
   6  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 only,
  10  * as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License version 2 for more details (a copy is included
  16  * in the LICENSE file that accompanied this code).
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * version 2 along with this program; If not, see
  20  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  21  *
  22  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  23  * CA 95054 USA or visit www.sun.com if you need additional information or
  24  * have any questions.
  25  *
  26  * GPL HEADER END
  27  */
  28 /*
  29  * Copyright  2008 Sun Microsystems, Inc. All rights reserved
  30  * Use is subject to license terms.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  *
  36  * lustre/tests/mpi/cascading_rw.c
  37  *
  38  * Author: You Feng <youfeng@clusterfs.com>
  39  */
  40
  41 #include <config.h>
  42 #include <mpi.h>
  43 #include <stdio.h>
  44 #include <stdlib.h>
  45 #include <string.h>
  46 #include <sys/types.h>
  47 #include <sys/stat.h>
  48 #include <fcntl.h>
  49 #include <unistd.h>
  50 #include <sys/ioctl.h>
  51 #include <getopt.h>
  52 #include <errno.h>
  53 #include "lp_utils.h"
  54 #ifndef _IOWR
  55 # include <ioctl.h>
  56 #endif
  57
  58 #include <lustre/liblustreapi.h>
  59
  60 int rank = 0;
  61 int size = 0;
  62
  63 char *testdir = NULL;
  64
  65 void rw_file(char *name, long stride, unsigned int seed)
  66 {
  67         char filename[MAX_FILENAME_LEN];
  68         char path[MAX_FILENAME_LEN];
  69         char errmsg[MAX_FILENAME_LEN+20];
  70         char *buf, *o_buf;
  71         struct lov_user_md lum = {0};
  72         int fd, rc, i, bad = 0, root = 0;
  73         long off;
  74         long PAGE_SIZE = sysconf(_SC_PAGESIZE);
  75
  76         sprintf(filename, "%s/%s", testdir, name);
  77
  78         if (rank == 0) {
  79                 remove_file_or_dir(filename);
  80
  81                 lum.lmm_magic = LOV_USER_MAGIC;
  82                 lum.lmm_stripe_size = 0;
  83                 lum.lmm_stripe_count = 0;
  84                 lum.lmm_stripe_offset = -1;
  85
  86                 fd = open(filename, O_CREAT | O_RDWR | O_LOV_DELAY_CREATE,
  87                           FILEMODE);
  88                 if (fd == -1) {
  89                         sprintf(errmsg, "open of file %s", filename);
  90                         FAIL(errmsg);
  91                 }
  92
  93                 rc = ioctl(fd, LL_IOC_LOV_SETSTRIPE, &lum);
  94                 if (rc == -1) {
  95                         sprintf(errmsg, "ioctl SETSTRIPE of file %s", filename);
  96                         FAIL(errmsg);
  97                 }
  98
  99                 if (close(fd) == -1) {
 100                         sprintf(errmsg, "close of file %s", filename);
 101                         FAIL(errmsg);
 102                 }
 103
 104                 strncpy(path, filename, MAX_FILENAME_LEN);
 105                 rc = llapi_file_get_stripe(path, &lum);
 106                 if (rc == -1) {
 107                         sprintf(errmsg, "get stripe of file %s", filename);
 108                         FAIL(errmsg);
 109                 }
 110         }
 111
 112         MPI_Barrier(MPI_COMM_WORLD);
 113
 114         if (stride < 0) {
 115                 if (rank == 0) {
 116                         srandom(seed);
 117                         while (stride < PAGE_SIZE/2) {
 118                                 stride = random();
 119                                 stride -= stride % 16;
 120                                 if (stride < 0)
 121                                         stride = -stride;
 122                                 stride %= 2 * lum.lmm_stripe_size;
 123                         }
 124                 }
 125
 126                 MPI_Barrier(MPI_COMM_WORLD);
 127
 128                 MPI_Bcast(&stride, 1, MPI_LONG, root, MPI_COMM_WORLD);
 129         }
 130
 131         MPI_Barrier(MPI_COMM_WORLD);
 132
 133         buf = (char *)malloc(stride);
 134         if (buf == NULL) {
 135                 sprintf(errmsg, "malloc of buf with size %ld", stride);
 136                 FAIL(errmsg);
 137         }
 138
 139         if (rank == 0) {
 140                 fd = open(filename, O_RDWR);
 141                 if (fd == -1) {
 142                         sprintf(errmsg, "open of file %s", filename);
 143                         FAIL(errmsg);
 144                 }
 145
 146                 off = 0;
 147                 fill_stride(buf, stride, 0, off);
 148                 rc = write(fd, buf, stride);
 149                 if (rc != stride) {
 150                         sprintf(errmsg, "write of file %s return %d",
 151                                 filename, rc);
 152                         FAIL(errmsg);
 153                 }
 154                 off += stride;
 155
 156                 while (off < size * stride) {
 157                         fill_stride(buf, stride, 0x8080808080808080ULL, off);
 158                         rc = write(fd, buf, stride);
 159                         if (rc != stride) {
 160                                 sprintf(errmsg, "write of file %s return %d",
 161                                         filename, rc);
 162                                 FAIL(errmsg);
 163                         }
 164
 165                         off += stride;
 166                 }
 167
 168                 if (close(fd) == -1) {
 169                         sprintf(errmsg, "close of file %s", filename);
 170                         FAIL(errmsg);
 171                 }
 172         }
 173
 174         MPI_Barrier(MPI_COMM_WORLD);
 175
 176         o_buf = (char *)malloc(stride);
 177         if (o_buf == NULL) {
 178                 sprintf(errmsg, "malloc of o_buf with size %ld", stride);
 179                 FAIL(errmsg);
 180         }
 181
 182         fd = open(filename, O_RDWR);
 183         if (fd == -1) {
 184                 sprintf(errmsg, "open of file %s", filename);
 185                 FAIL(errmsg);
 186         }
 187
 188         off = 0;
 189         for (i = 1; i < size; ++i) {
 190                 if (rank == i) {
 191                         rc = lseek(fd, off, SEEK_SET);
 192                         if (rc != off) {
 193                                 sprintf(errmsg, "lseek of file %s return %d",
 194                                         filename, rc);
 195                                 FAIL(errmsg);
 196                         }
 197
 198                         rc = read(fd, buf, stride);
 199                         if (rc != stride) {
 200                                 if (rc > 0) {
 201                                         fill_stride(o_buf, rc, i - 1, off);
 202                                         dump_diff(o_buf, buf, rc, off);
 203                                 }
 204                                 sprintf(errmsg, "read of file %s return %d",
 205                                         filename, rc);
 206                                 FAIL(errmsg);
 207                         }
 208
 209                         fill_stride(o_buf, stride, i - 1, off);
 210                         if (memcmp(o_buf, buf, stride) != 0) {
 211                                 dump_diff(o_buf, buf, stride, off);
 212                                 errno = 0;
 213                                 sprintf(errmsg, "Error: diff data read from %s",
 214                                         filename);
 215                                 FAIL(errmsg);
 216                         }
 217                 }
 218
 219                 off += stride;
 220
 221                 if (rank == i) {
 222                         fill_stride(buf, stride, i, off);
 223                         rc = write(fd, buf, stride);
 224                         if (rc != stride) {
 225                                 sprintf(errmsg, "write of file %s return %d",
 226                                         filename, rc);
 227                                 FAIL(errmsg);
 228                         }
 229                 }
 230
 231                 MPI_Barrier(MPI_COMM_WORLD);
 232         }
 233
 234         if (close(fd) == -1) {
 235                 sprintf(errmsg, "close of file %s", filename);
 236                 FAIL(errmsg);
 237         }
 238
 239         MPI_Barrier(MPI_COMM_WORLD);
 240
 241         if (rank == 0) {
 242                 fd = open(filename, O_RDONLY);
 243                 if (fd == -1) {
 244                         sprintf(errmsg, "open of file %s", filename);
 245                         FAIL(errmsg);
 246                 }
 247
 248                 off = 0;
 249                 for (i = 0; i < size; ++i) {
 250                         rc = read(fd, buf, stride);
 251                         if (rc != stride) {
 252                                 if (rc > 0) {
 253                                         fill_stride(o_buf, rc, i, off);
 254                                         dump_diff(o_buf, buf, rc, off);
 255                                 }
 256                                 sprintf(errmsg, "read of file %s", filename);
 257                                 FAIL(errmsg);
 258                         }
 259
 260                         fill_stride(o_buf, stride, i, off);
 261                         if (memcmp(o_buf, buf, stride) != 0) {
 262                                 bad = 1;
 263                                 dump_diff(o_buf, buf, stride, off);
 264                         }
 265                         off += stride;
 266                 }
 267                 if (bad == 1) {
 268                         errno = 0;
 269                         sprintf(errmsg, "Error: diff data read from %s", filename);
 270                         FAIL(errmsg);
 271                 }
 272         }
 273
 274         MPI_Barrier(MPI_COMM_WORLD);
 275         fprintf(stderr, "passed barrier 5\n");
 276
 277         free(buf);
 278         free(o_buf);
 279 }
 280
 281 void cascading_rw(long stride, unsigned int seed)
 282 {
 283         begin("setup");
 284         end("setup");
 285
 286         begin("test");
 287         rw_file("cascading_rw", stride, seed);
 288         end("test");
 289
 290         begin("cleanup");
 291         remove_file("cascading_rw");
 292         end("cleanup");
 293 }
 294
 295 void usage(char *proc)
 296 {
 297         int i;
 298
 299         if (rank == 0) {
 300                 printf("Usage: %s [-h] -d <testdir> [-s \"1024\"]\n", proc);
 301                 printf("           [-n \"13\"] [-e \"12345\"]\n");
 302                 printf("           [-v] [-V #] [-g]\n");
 303                 printf("\t-h: prints this help message\n");
 304                 printf("\t-d: the directory in which the tests will run\n");
 305                 printf("\t-s: process stride size\n");
 306                 printf("\t-n: repeat test # times\n");
 307                 printf("\t-n: random seed, used to re-create previous runs\n");
 308                 printf("\t-v: increase the verbositly level by 1\n");
 309                 printf("\t-V: select a specific verbosity level\n");
 310                 printf("\t-g: debug mode\n");
 311         }
 312
 313         MPI_Initialized(&i);
 314         if (i) MPI_Finalize();
 315         exit(0);
 316 }
 317
 318 int main(int argc, char *argv[])
 319 {
 320         int i, iterations = 16;
 321         char c;
 322         long stride = -1;
 323         unsigned int seed = 0;
 324
 325         /* Check for -h parameter before MPI_Init so the binary can be
 326            called directly, without, for instance, mpirun */
 327         for (i = 1; i < argc; ++i) {
 328                 if (!strcmp(argv[i], "-h") || !strcmp(argv[i], "--help"))
 329                         usage(argv[0]);
 330         }
 331
 332         MPI_Init(&argc, &argv);
 333         MPI_Comm_rank(MPI_COMM_WORLD, &rank);
 334         MPI_Comm_size(MPI_COMM_WORLD, &size);
 335
 336                 /* Parse command line options */
 337         while (1) {
 338                 c = getopt(argc, argv, "d:e:ghn:s:vV:");
 339                 if (c == -1)
 340                         break;
 341
 342                 switch (c) {
 343                 case 'd':
 344                         testdir = optarg;
 345                         break;
 346                 case 'e':
 347                         seed = (unsigned int)atoi(optarg);
 348                         break;
 349                 case 'g':
 350                         debug = 1;
 351                         break;
 352                 case 'h':
 353                         usage(argv[0]);
 354                         break;
 355                 case 'n':
 356                         iterations = atoi(optarg);
 357                         break;
 358                 case 's':
 359                         stride = atol(optarg);
 360                         break;
 361                 case 'v':
 362                         verbose += 1;
 363                         break;
 364                 case 'V':
 365                         verbose = atoi(optarg);
 366                         break;
 367                 }
 368         }
 369
 370         if (rank == 0)
 371                 printf("%s is running with %d process(es) %s\n",
 372                        argv[0], size, debug ? "in DEBUG mode" : "\b\b");
 373
 374         if (size < 2) {
 375                 fprintf(stderr,
 376                         "There should be at least 3 process to run the test!\n");
 377                 MPI_Abort(MPI_COMM_WORLD, 2);
 378         }
 379
 380         if (testdir == NULL && rank == 0) {
 381                 fprintf(stderr, "Please specify a test directory! (\"%s -h\" for help)\n",
 382                        argv[0]);
 383                 MPI_Abort(MPI_COMM_WORLD, 2);
 384         }
 385
 386         lp_gethostname();
 387
 388         for (i = 0; i < iterations; ++i) {
 389                 if (rank == 0)
 390                         printf("%s: Running test #%s(iter %d)\n",
 391                                timestamp(), argv[0], i);
 392
 393                 cascading_rw(stride, seed);
 394                 MPI_Barrier(MPI_COMM_WORLD);
 395         }
 396
 397         if (rank == 0)
 398                 printf("%s: All tests passed!\n", timestamp());
 399         MPI_Finalize();
 400         return 0;
 401 }