lustre/osd-ldiskfs/osd_lproc.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2011, Whamcloud, Inc.
  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/osd/osd_lproc.c
  37  *
  38  * Author: Mikhail Pershin <tappro@sun.com>
  39  */
  40
  41 #define DEBUG_SUBSYSTEM S_CLASS
  42
  43 #include <lprocfs_status.h>
  44 #include <lu_time.h>
  45
  46 #include <lustre/lustre_idl.h>
  47
  48 #include "osd_internal.h"
  49
  50 #ifdef LPROCFS
  51
  52 void osd_brw_stats_update(struct osd_device *osd, struct osd_iobuf *iobuf)
  53 {
  54         struct brw_stats *s = &osd->od_brw_stats;
  55         unsigned long    *last_block = NULL;
  56         struct page     **pages = iobuf->dr_pages;
  57         struct page      *last_page = NULL;
  58         unsigned long     discont_pages = 0;
  59         unsigned long     discont_blocks = 0;
  60         unsigned long    *blocks = iobuf->dr_blocks;
  61         int               i, nr_pages = iobuf->dr_npages;
  62         int               blocks_per_page;
  63         int               rw = iobuf->dr_rw;
  64
  65         if (unlikely(nr_pages == 0))
  66                 return;
  67
  68         blocks_per_page = CFS_PAGE_SIZE >> osd_sb(osd)->s_blocksize_bits;
  69
  70         lprocfs_oh_tally_log2(&s->hist[BRW_R_PAGES+rw], nr_pages);
  71
  72         while (nr_pages-- > 0) {
  73                 if (last_page && (*pages)->index != (last_page->index + 1))
  74                         discont_pages++;
  75                 last_page = *pages;
  76                 pages++;
  77                 for (i = 0; i < blocks_per_page; i++) {
  78                         if (last_block && *blocks != (*last_block + 1))
  79                                 discont_blocks++;
  80                         last_block = blocks++;
  81                 }
  82         }
  83
  84         lprocfs_oh_tally(&s->hist[BRW_R_DISCONT_PAGES+rw], discont_pages);
  85         lprocfs_oh_tally(&s->hist[BRW_R_DISCONT_BLOCKS+rw], discont_blocks);
  86 }
  87
  88 #define pct(a, b) (b ? a * 100 / b : 0)
  89
  90 static void display_brw_stats(struct seq_file *seq, char *name, char *units,
  91         struct obd_histogram *read, struct obd_histogram *write, int scale)
  92 {
  93         unsigned long read_tot, write_tot, r, w, read_cum = 0, write_cum = 0;
  94         int i;
  95
  96         seq_printf(seq, "\n%26s read      |     write\n", " ");
  97         seq_printf(seq, "%-22s %-5s %% cum %% |  %-11s %% cum %%\n",
  98                    name, units, units);
  99
 100         read_tot = lprocfs_oh_sum(read);
 101         write_tot = lprocfs_oh_sum(write);
 102         for (i = 0; i < OBD_HIST_MAX; i++) {
 103                 r = read->oh_buckets[i];
 104                 w = write->oh_buckets[i];
 105                 read_cum += r;
 106                 write_cum += w;
 107                 if (read_cum == 0 && write_cum == 0)
 108                         continue;
 109
 110                 if (!scale)
 111                         seq_printf(seq, "%u", i);
 112                 else if (i < 10)
 113                         seq_printf(seq, "%u", scale << i);
 114                 else if (i < 20)
 115                         seq_printf(seq, "%uK", scale << (i-10));
 116                 else
 117                         seq_printf(seq, "%uM", scale << (i-20));
 118
 119                 seq_printf(seq, ":\t\t%10lu %3lu %3lu   | %4lu %3lu %3lu\n",
 120                            r, pct(r, read_tot), pct(read_cum, read_tot),
 121                            w, pct(w, write_tot), pct(write_cum, write_tot));
 122
 123                 if (read_cum == read_tot && write_cum == write_tot)
 124                         break;
 125         }
 126 }
 127
 128 static void brw_stats_show(struct seq_file *seq, struct brw_stats *brw_stats)
 129 {
 130         struct timeval now;
 131
 132         /* this sampling races with updates */
 133         cfs_gettimeofday(&now);
 134         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
 135                    now.tv_sec, now.tv_usec);
 136
 137         display_brw_stats(seq, "pages per bulk r/w", "rpcs",
 138                           &brw_stats->hist[BRW_R_PAGES],
 139                           &brw_stats->hist[BRW_W_PAGES], 1);
 140
 141         display_brw_stats(seq, "discontiguous pages", "rpcs",
 142                           &brw_stats->hist[BRW_R_DISCONT_PAGES],
 143                           &brw_stats->hist[BRW_W_DISCONT_PAGES], 0);
 144
 145         display_brw_stats(seq, "discontiguous blocks", "rpcs",
 146                           &brw_stats->hist[BRW_R_DISCONT_BLOCKS],
 147                           &brw_stats->hist[BRW_W_DISCONT_BLOCKS], 0);
 148
 149         display_brw_stats(seq, "disk fragmented I/Os", "ios",
 150                           &brw_stats->hist[BRW_R_DIO_FRAGS],
 151                           &brw_stats->hist[BRW_W_DIO_FRAGS], 0);
 152
 153         display_brw_stats(seq, "disk I/Os in flight", "ios",
 154                           &brw_stats->hist[BRW_R_RPC_HIST],
 155                           &brw_stats->hist[BRW_W_RPC_HIST], 0);
 156
 157         display_brw_stats(seq, "I/O time (1/1000s)", "ios",
 158                           &brw_stats->hist[BRW_R_IO_TIME],
 159                           &brw_stats->hist[BRW_W_IO_TIME], 1000 / CFS_HZ);
 160
 161         display_brw_stats(seq, "disk I/O size", "ios",
 162                           &brw_stats->hist[BRW_R_DISK_IOSIZE],
 163                           &brw_stats->hist[BRW_W_DISK_IOSIZE], 1);
 164 }
 165
 166 #undef pct
 167
 168 static int osd_brw_stats_seq_show(struct seq_file *seq, void *v)
 169 {
 170         struct osd_device *osd = seq->private;
 171
 172         brw_stats_show(seq, &osd->od_brw_stats);
 173
 174         return 0;
 175 }
 176
 177 static ssize_t osd_brw_stats_seq_write(struct file *file, const char *buf,
 178                                        size_t len, loff_t *off)
 179 {
 180         struct seq_file *seq = file->private_data;
 181         struct osd_device *osd = seq->private;
 182         int i;
 183
 184         for (i = 0; i < BRW_LAST; i++)
 185                 lprocfs_oh_clear(&osd->od_brw_stats.hist[i]);
 186
 187         return len;
 188 }
 189
 190 LPROC_SEQ_FOPS(osd_brw_stats);
 191
 192 static int osd_stats_init(struct osd_device *osd)
 193 {
 194         int i, result;
 195         ENTRY;
 196
 197         for (i = 0; i < BRW_LAST; i++)
 198                 cfs_spin_lock_init(&osd->od_brw_stats.hist[i].oh_lock);
 199
 200         osd->od_stats = lprocfs_alloc_stats(LPROC_OSD_LAST, 0);
 201         if (osd->od_stats != NULL) {
 202                 result = lprocfs_register_stats(osd->od_proc_entry, "stats",
 203                                                 osd->od_stats);
 204                 if (result)
 205                         GOTO(out, result);
 206
 207                 lprocfs_counter_init(osd->od_stats, LPROC_OSD_GET_PAGE,
 208                                      LPROCFS_CNTR_AVGMINMAX|LPROCFS_CNTR_STDDEV,
 209                                      "get_page", "usec");
 210                 lprocfs_counter_init(osd->od_stats, LPROC_OSD_NO_PAGE,
 211                                      LPROCFS_CNTR_AVGMINMAX,
 212                                      "get_page_failures", "num");
 213                 lprocfs_counter_init(osd->od_stats, LPROC_OSD_CACHE_ACCESS,
 214                                      LPROCFS_CNTR_AVGMINMAX,
 215                                      "cache_access", "pages");
 216                 lprocfs_counter_init(osd->od_stats, LPROC_OSD_CACHE_HIT,
 217                                      LPROCFS_CNTR_AVGMINMAX,
 218                                      "cache_hit", "pages");
 219                 lprocfs_counter_init(osd->od_stats, LPROC_OSD_CACHE_MISS,
 220                                      LPROCFS_CNTR_AVGMINMAX,
 221                                      "cache_miss", "pages");
 222 #if OSD_THANDLE_STATS
 223                 lprocfs_counter_init(osd->od_stats, LPROC_OSD_THANDLE_STARTING,
 224                                      LPROCFS_CNTR_AVGMINMAX,
 225                                      "thandle starting", "usec");
 226                 lprocfs_counter_init(osd->od_stats, LPROC_OSD_THANDLE_OPEN,
 227                                      LPROCFS_CNTR_AVGMINMAX,
 228                                      "thandle open", "usec");
 229                 lprocfs_counter_init(osd->od_stats, LPROC_OSD_THANDLE_CLOSING,
 230                                      LPROCFS_CNTR_AVGMINMAX,
 231                                      "thandle closing", "usec");
 232 #endif
 233                 lprocfs_seq_create(osd->od_proc_entry, "brw_stats",
 234                                    0444, &osd_brw_stats_fops, osd);
 235         } else
 236                 result = -ENOMEM;
 237
 238 out:
 239         RETURN(result);
 240 }
 241
 242 static const char *osd_counter_names[] = {
 243 #if OSD_THANDLE_STATS
 244         [LPROC_OSD_THANDLE_STARTING] = "thandle starting",
 245         [LPROC_OSD_THANDLE_OPEN]     = "thandle open",
 246         [LPROC_OSD_THANDLE_CLOSING]  = "thandle closing"
 247 #endif
 248 };
 249
 250 int osd_procfs_init(struct osd_device *osd, const char *name)
 251 {
 252         struct lprocfs_static_vars lvars;
 253         struct obd_type     *type;
 254         int                  rc;
 255         ENTRY;
 256
 257         /* at the moment there is no linkage between lu_type
 258          * and obd_type, so we lookup obd_type this way */
 259         type = class_search_type(LUSTRE_OSD_LDISKFS_NAME);
 260
 261         LASSERT(name != NULL);
 262         LASSERT(type != NULL);
 263
 264         /* Find the type procroot and add the proc entry for this device */
 265         lprocfs_osd_init_vars(&lvars);
 266         osd->od_proc_entry = lprocfs_register(name, type->typ_procroot,
 267                                               lvars.obd_vars, &osd->od_dt_dev);
 268         if (IS_ERR(osd->od_proc_entry)) {
 269                 rc = PTR_ERR(osd->od_proc_entry);
 270                 CERROR("Error %d setting up lprocfs for %s\n",
 271                        rc, name);
 272                 osd->od_proc_entry = NULL;
 273                 GOTO(out, rc);
 274         }
 275
 276         rc = lu_time_init(&osd->od_stats,
 277                           osd->od_proc_entry,
 278                           osd_counter_names, ARRAY_SIZE(osd_counter_names));
 279
 280         rc = osd_stats_init(osd);
 281
 282         EXIT;
 283 out:
 284         if (rc)
 285                osd_procfs_fini(osd);
 286         return rc;
 287 }
 288
 289 int osd_procfs_fini(struct osd_device *osd)
 290 {
 291         if (osd->od_stats)
 292                 lu_time_fini(&osd->od_stats);
 293
 294         if (osd->od_proc_entry) {
 295                  lprocfs_remove(&osd->od_proc_entry);
 296                  osd->od_proc_entry = NULL;
 297         }
 298         RETURN(0);
 299 }
 300
 301 void osd_lprocfs_time_start(const struct lu_env *env)
 302 {
 303         lu_lprocfs_time_start(env);
 304 }
 305
 306 void osd_lprocfs_time_end(const struct lu_env *env, struct osd_device *osd,
 307                           int idx)
 308 {
 309         lu_lprocfs_time_end(env, osd->od_stats, idx);
 310 }
 311
 312
 313
 314 static int lprocfs_osd_rd_fstype(char *page, char **start, off_t off, int count,
 315                                  int *eof, void *data)
 316 {
 317         struct obd_device *osd = data;
 318
 319         LASSERT(osd != NULL);
 320         return snprintf(page, count, "ldiskfs\n");
 321 }
 322
 323 static int lprocfs_osd_rd_mntdev(char *page, char **start, off_t off, int count,
 324                                  int *eof, void *data)
 325 {
 326         struct osd_device *osd = osd_dt_dev(data);
 327
 328         LASSERT(osd != NULL);
 329         if (unlikely(osd->od_mnt == NULL))
 330                 return -EINPROGRESS;
 331
 332         LASSERT(mnt_get_devname(osd->od_mnt));
 333         *eof = 1;
 334
 335         return snprintf(page, count, "%s\n",
 336                         mnt_get_devname(osd->od_mnt));
 337 }
 338
 339 #ifdef HAVE_LDISKFS_PDO
 340 static int lprocfs_osd_rd_pdo(char *page, char **start, off_t off, int count,
 341                               int *eof, void *data)
 342 {
 343         *eof = 1;
 344
 345         return snprintf(page, count, "%s\n", ldiskfs_pdo ? "ON" : "OFF");
 346 }
 347
 348 static int lprocfs_osd_wr_pdo(struct file *file, const char *buffer,
 349                               unsigned long count, void *data)
 350 {
 351         int     pdo;
 352         int     rc;
 353
 354         rc = lprocfs_write_helper(buffer, count, &pdo);
 355         if (rc != 0)
 356                 return rc;
 357
 358         ldiskfs_pdo = !!pdo;
 359
 360         return count;
 361 }
 362 #endif
 363
 364 static int lprocfs_osd_rd_auto_scrub(char *page, char **start, off_t off,
 365                                      int count, int *eof, void *data)
 366 {
 367         struct osd_device *dev = data;
 368
 369         LASSERT(dev != NULL);
 370         if (unlikely(dev->od_mnt == NULL))
 371                 return -EINPROGRESS;
 372
 373         *eof = 1;
 374         return snprintf(page, count, "%d\n", !dev->od_scrub.os_no_scrub);
 375 }
 376
 377 static int lprocfs_osd_wr_auto_scrub(struct file *file, const char *buffer,
 378                                      unsigned long count, void *data)
 379 {
 380         struct osd_device *dev = data;
 381         int val, rc;
 382
 383         LASSERT(dev != NULL);
 384         if (unlikely(dev->od_mnt == NULL))
 385                 return -EINPROGRESS;
 386
 387         rc = lprocfs_write_helper(buffer, count, &val);
 388         if (rc)
 389                 return rc;
 390
 391         dev->od_scrub.os_no_scrub = !val;
 392         return count;
 393 }
 394
 395 static int lprocfs_osd_rd_oi_scrub(char *page, char **start, off_t off,
 396                                    int count, int *eof, void *data)
 397 {
 398         struct osd_device *dev = data;
 399
 400         LASSERT(dev != NULL);
 401         if (unlikely(dev->od_mnt == NULL))
 402                 return -EINPROGRESS;
 403
 404         *eof = 1;
 405         return osd_scrub_dump(dev, page, count);
 406 }
 407
 408 struct lprocfs_vars lprocfs_osd_obd_vars[] = {
 409         { "blocksize",       lprocfs_osd_rd_blksize,     0, 0 },
 410         { "kbytestotal",     lprocfs_osd_rd_kbytestotal, 0, 0 },
 411         { "kbytesfree",      lprocfs_osd_rd_kbytesfree,  0, 0 },
 412         { "kbytesavail",     lprocfs_osd_rd_kbytesavail, 0, 0 },
 413         { "filestotal",      lprocfs_osd_rd_filestotal,  0, 0 },
 414         { "filesfree",       lprocfs_osd_rd_filesfree,   0, 0 },
 415         { "fstype",          lprocfs_osd_rd_fstype,      0, 0 },
 416         { "mntdev",          lprocfs_osd_rd_mntdev,      0, 0 },
 417 #ifdef HAVE_LDISKFS_PDO
 418         { "pdo",             lprocfs_osd_rd_pdo, lprocfs_osd_wr_pdo, 0 },
 419 #endif
 420         { "auto_scrub",      lprocfs_osd_rd_auto_scrub,
 421                              lprocfs_osd_wr_auto_scrub,  0 },
 422         { "oi_scrub",        lprocfs_osd_rd_oi_scrub,    0, 0 },
 423         { 0 }
 424 };
 425
 426 struct lprocfs_vars lprocfs_osd_module_vars[] = {
 427         { "num_refs",        lprocfs_rd_numrefs,     0, 0 },
 428         { 0 }
 429 };
 430
 431 void lprocfs_osd_init_vars(struct lprocfs_static_vars *lvars)
 432 {
 433         lvars->module_vars = lprocfs_osd_module_vars;
 434         lvars->obd_vars = lprocfs_osd_obd_vars;
 435 }
 436 #endif