lustre/obdfilter/lproc_obdfilter.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  *  Copyright (C) 2002, 2003 Cluster File Systems, Inc.
   5  *
   6  *   This file is part of Lustre, http://www.lustre.org.
   7  *
   8  *   Lustre is free software; you can redistribute it and/or
   9  *   modify it under the terms of version 2 of the GNU General Public
  10  *   License as published by the Free Software Foundation.
  11  *
  12  *   Lustre is distributed in the hope that it will be useful,
  13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *   GNU General Public License for more details.
  16  *
  17  *   You should have received a copy of the GNU General Public License
  18  *   along with Lustre; if not, write to the Free Software
  19  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20  *
  21  */
  22 #define DEBUG_SUBSYSTEM S_CLASS
  23
  24 #include <linux/version.h>
  25 #include <linux/lprocfs_status.h>
  26 #include <linux/obd.h>
  27 #include <linux/seq_file.h>
  28
  29 #include "filter_internal.h"
  30
  31 #ifndef LPROCFS
  32 static struct lprocfs_vars lprocfs_obd_vars[]  = { {0} };
  33 static struct lprocfs_vars lprocfs_module_vars[] = { {0} };
  34 #else
  35
  36 static int lprocfs_filter_rd_mntdev(char *page, char **start, off_t off,
  37                                     int count, int *eof, void *data)
  38 {
  39         struct obd_device* obd = (struct obd_device *)data;
  40
  41         LASSERT(obd != NULL);
  42         LASSERT(obd->u.filter.fo_vfsmnt->mnt_devname);
  43         *eof = 1;
  44         return snprintf(page, count, "%s\n",
  45                         obd->u.filter.fo_vfsmnt->mnt_devname);
  46 }
  47
  48 static int lprocfs_filter_rd_last_id(char *page, char **start, off_t off,
  49                                      int count, int *eof, void *data)
  50 {
  51         struct obd_device *obd = data;
  52
  53         if (obd == NULL)
  54                 return 0;
  55
  56         return snprintf(page, count, LPU64"\n",
  57                         filter_last_id(&obd->u.filter, 0));
  58 }
  59
  60 static struct lprocfs_vars lprocfs_obd_vars[] = {
  61         { "uuid",         lprocfs_rd_uuid,          0, 0 },
  62         { "blocksize",    lprocfs_rd_blksize,       0, 0 },
  63         { "kbytestotal",  lprocfs_rd_kbytestotal,   0, 0 },
  64         { "kbytesfree",   lprocfs_rd_kbytesfree,    0, 0 },
  65         { "filestotal",   lprocfs_rd_filestotal,    0, 0 },
  66         { "filesfree",    lprocfs_rd_filesfree,     0, 0 },
  67         //{ "filegroups",   lprocfs_rd_filegroups,    0, 0 },
  68         { "fstype",       lprocfs_rd_fstype,        0, 0 },
  69         { "mntdev",       lprocfs_filter_rd_mntdev, 0, 0 },
  70         { "last_id",      lprocfs_filter_rd_last_id, 0, 0 },
  71         { 0 }
  72 };
  73
  74 static struct lprocfs_vars lprocfs_module_vars[] = {
  75         { "num_refs",     lprocfs_rd_numrefs,       0, 0 },
  76         { 0 }
  77 };
  78
  79 void filter_tally_write(struct filter_obd *filter, struct page **pages,
  80                      int nr_pages, unsigned long *blocks, int blocks_per_page)
  81 {
  82         struct page *last_page = NULL;
  83         unsigned long *last_block = NULL;
  84         unsigned long discont_pages = 0;
  85         unsigned long discont_blocks = 0;
  86         int i;
  87
  88         if (nr_pages == 0)
  89                 return;
  90
  91         lprocfs_oh_tally_log2(&filter->fo_w_pages, nr_pages);
  92
  93         while (nr_pages-- > 0) {
  94                 if (last_page && (*pages)->index != (last_page->index + 1))
  95                         discont_pages++;
  96                 last_page = *pages;
  97                 pages++;
  98                 for (i = 0; i < blocks_per_page; i++) {
  99                         if (last_block && *blocks != (*last_block + 1))
 100                                 discont_blocks++;
 101                         last_block = blocks++;
 102                 }
 103         }
 104
 105         lprocfs_oh_tally(&filter->fo_w_discont_pages, discont_pages);
 106         lprocfs_oh_tally(&filter->fo_w_discont_blocks, discont_blocks);
 107 }
 108
 109 void filter_tally_read(struct filter_obd *filter, struct niobuf_local *lnb,
 110                        int niocount)
 111 {
 112         struct niobuf_local *end;
 113         struct page *last_page = NULL;
 114         unsigned long discont_pages = 0;
 115         unsigned long discont_blocks = 0;
 116
 117         if (niocount == 0)
 118                 return;
 119
 120         for (end = lnb + niocount; lnb < end && lnb->page; lnb++) {
 121                 struct page *page = lnb->page;
 122                 if (last_page) {
 123                        if (page->index != (last_page->index + 1))
 124                                 discont_pages++;
 125                         /* XXX not so smart for now */
 126                         if ((page->buffers && last_page->buffers) &&
 127                             (page->buffers->b_blocknr !=
 128                              (last_page->buffers->b_blocknr + 1)))
 129                                 discont_blocks++;
 130                 }
 131                 last_page = page;
 132         }
 133
 134         lprocfs_oh_tally_log2(&filter->fo_r_pages, niocount);
 135         lprocfs_oh_tally(&filter->fo_r_discont_pages, discont_pages);
 136         lprocfs_oh_tally(&filter->fo_r_discont_blocks, discont_blocks);
 137 }
 138
 139 #define pct(a,b) (b ? a * 100 / b : 0)
 140
 141 static int filter_brw_stats_seq_show(struct seq_file *seq, void *v)
 142 {
 143         struct timeval now;
 144         struct obd_device *dev = seq->private;
 145         struct filter_obd *filter = &dev->u.filter;
 146         unsigned long read_tot = 0, write_tot = 0, read_cum, write_cum;
 147         int i;
 148
 149         do_gettimeofday(&now);
 150
 151         /* this sampling races with updates */
 152
 153         seq_printf(seq, "snapshot_time:         %lu:%lu (secs:usecs)\n",
 154                    now.tv_sec, now.tv_usec);
 155
 156         seq_printf(seq, "\n\t\t\tread\t\t\twrite\n");
 157         seq_printf(seq, "pages per brw         brws   %% cum %% |");
 158         seq_printf(seq, "       rpcs   %% cum %%\n");
 159
 160         read_tot = lprocfs_oh_sum(&filter->fo_r_pages);
 161         write_tot = lprocfs_oh_sum(&filter->fo_w_pages);
 162
 163         read_cum = 0;
 164         write_cum = 0;
 165         for (i = 0; i < OBD_HIST_MAX; i++) {
 166                 unsigned long r = filter->fo_r_pages.oh_buckets[i];
 167                 unsigned long w = filter->fo_w_pages.oh_buckets[i];
 168                 read_cum += r;
 169                 write_cum += w;
 170                 seq_printf(seq, "%d:\t\t%10lu %3lu %3lu   | %10lu %3lu %3lu\n",
 171                                  1 << i, r, pct(r, read_tot),
 172                                  pct(read_cum, read_tot), w,
 173                                  pct(w, write_tot),
 174                                  pct(write_cum, write_tot));
 175                 if (read_cum == read_tot && write_cum == write_tot)
 176                         break;
 177         }
 178
 179         seq_printf(seq, "\n\t\t\tread\t\t\twrite\n");
 180         seq_printf(seq, "discont pages        rpcs   %% cum %% |");
 181         seq_printf(seq, "       rpcs   %% cum %%\n");
 182
 183         read_tot = lprocfs_oh_sum(&filter->fo_r_discont_pages);
 184         write_tot = lprocfs_oh_sum(&filter->fo_w_discont_pages);
 185
 186         read_cum = 0;
 187         write_cum = 0;
 188
 189         for (i = 0; i < OBD_HIST_MAX; i++) {
 190                 unsigned long r = filter->fo_r_discont_pages.oh_buckets[i];
 191                 unsigned long w = filter->fo_w_discont_pages.oh_buckets[i];
 192                 read_cum += r;
 193                 write_cum += w;
 194                 seq_printf(seq, "%d:\t\t%10lu %3lu %3lu   | %10lu %3lu %3lu\n",
 195                                  i, r, pct(r, read_tot),
 196                                  pct(read_cum, read_tot), w,
 197                                  pct(w, write_tot),
 198                                  pct(write_cum, write_tot));
 199                 if (read_cum == read_tot && write_cum == write_tot)
 200                         break;
 201         }
 202
 203         seq_printf(seq, "\n\t\t\tread\t\t\twrite\n");
 204         seq_printf(seq, "discont blocks        rpcs   %% cum %% |");
 205         seq_printf(seq, "       rpcs   %% cum %%\n");
 206
 207         read_tot = lprocfs_oh_sum(&filter->fo_r_discont_blocks);
 208         write_tot = lprocfs_oh_sum(&filter->fo_w_discont_blocks);
 209
 210         read_cum = 0;
 211         write_cum = 0;
 212         for (i = 0; i < OBD_HIST_MAX; i++) {
 213                 unsigned long r = filter->fo_r_discont_blocks.oh_buckets[i];
 214                 unsigned long w = filter->fo_w_discont_blocks.oh_buckets[i];
 215                 read_cum += r;
 216                 write_cum += w;
 217                 seq_printf(seq, "%d:\t\t%10lu %3lu %3lu   | %10lu %3lu %3lu\n",
 218                                  i, r, pct(r, read_tot),
 219                                  pct(read_cum, read_tot), w,
 220                                  pct(w, write_tot),
 221                                  pct(write_cum, write_tot));
 222                 if (read_cum == read_tot && write_cum == write_tot)
 223                         break;
 224         }
 225
 226         return 0;
 227 }
 228 #undef pct
 229
 230 static void *filter_brw_stats_seq_start(struct seq_file *p, loff_t *pos)
 231 {
 232         if (*pos == 0)
 233                 return (void *)1;
 234         return NULL;
 235 }
 236 static void *filter_brw_stats_seq_next(struct seq_file *p, void *v, loff_t *pos)
 237 {
 238         ++*pos;
 239         return NULL;
 240 }
 241 static void filter_brw_stats_seq_stop(struct seq_file *p, void *v)
 242 {
 243 }
 244 struct seq_operations filter_brw_stats_seq_sops = {
 245         .start = filter_brw_stats_seq_start,
 246         .stop = filter_brw_stats_seq_stop,
 247         .next = filter_brw_stats_seq_next,
 248         .show = filter_brw_stats_seq_show,
 249 };
 250
 251 static int filter_brw_stats_seq_open(struct inode *inode, struct file *file)
 252 {
 253         struct proc_dir_entry *dp = inode->u.generic_ip;
 254         struct seq_file *seq;
 255         int rc;
 256
 257         rc = seq_open(file, &filter_brw_stats_seq_sops);
 258         if (rc)
 259                 return rc;
 260         seq = file->private_data;
 261         seq->private = dp->data;
 262         return 0;
 263 }
 264
 265 static ssize_t filter_brw_stats_seq_write(struct file *file, const char *buf,
 266                                        size_t len, loff_t *off)
 267 {
 268         struct seq_file *seq = file->private_data;
 269         struct obd_device *dev = seq->private;
 270         struct filter_obd *filter = &dev->u.filter;
 271
 272         lprocfs_oh_clear(&filter->fo_r_pages);
 273         lprocfs_oh_clear(&filter->fo_w_pages);
 274         lprocfs_oh_clear(&filter->fo_r_discont_pages);
 275         lprocfs_oh_clear(&filter->fo_w_discont_pages);
 276         lprocfs_oh_clear(&filter->fo_r_discont_blocks);
 277         lprocfs_oh_clear(&filter->fo_w_discont_blocks);
 278
 279         return len;
 280 }
 281
 282 struct file_operations filter_brw_stats_fops = {
 283         .open    = filter_brw_stats_seq_open,
 284         .read    = seq_read,
 285         .write   = filter_brw_stats_seq_write,
 286         .llseek  = seq_lseek,
 287         .release = seq_release,
 288 };
 289
 290 int lproc_filter_attach_seqstat(struct obd_device *dev)
 291 {
 292         return lprocfs_obd_seq_create(dev, "brw_stats", 0444,
 293                                       &filter_brw_stats_fops, dev);
 294 }
 295
 296
 297
 298 #endif /* LPROCFS */
 299 LPROCFS_INIT_VARS(filter,lprocfs_module_vars, lprocfs_obd_vars)