linux/fs/fscache/stats.c
<<
>>
Prefs
   1/* FS-Cache statistics
   2 *
   3 * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
   4 * Written by David Howells (dhowells@redhat.com)
   5 *
   6 * This program is free software; you can redistribute it and/or
   7 * modify it under the terms of the GNU General Public License
   8 * as published by the Free Software Foundation; either version
   9 * 2 of the License, or (at your option) any later version.
  10 */
  11
  12#define FSCACHE_DEBUG_LEVEL THREAD
  13#include <linux/module.h>
  14#include <linux/proc_fs.h>
  15#include <linux/seq_file.h>
  16#include "internal.h"
  17
  18/*
  19 * operation counters
  20 */
  21atomic_t fscache_n_op_pend;
  22atomic_t fscache_n_op_run;
  23atomic_t fscache_n_op_enqueue;
  24atomic_t fscache_n_op_requeue;
  25atomic_t fscache_n_op_deferred_release;
  26atomic_t fscache_n_op_release;
  27atomic_t fscache_n_op_gc;
  28atomic_t fscache_n_op_cancelled;
  29atomic_t fscache_n_op_rejected;
  30
  31atomic_t fscache_n_attr_changed;
  32atomic_t fscache_n_attr_changed_ok;
  33atomic_t fscache_n_attr_changed_nobufs;
  34atomic_t fscache_n_attr_changed_nomem;
  35atomic_t fscache_n_attr_changed_calls;
  36
  37atomic_t fscache_n_allocs;
  38atomic_t fscache_n_allocs_ok;
  39atomic_t fscache_n_allocs_wait;
  40atomic_t fscache_n_allocs_nobufs;
  41atomic_t fscache_n_allocs_intr;
  42atomic_t fscache_n_allocs_object_dead;
  43atomic_t fscache_n_alloc_ops;
  44atomic_t fscache_n_alloc_op_waits;
  45
  46atomic_t fscache_n_retrievals;
  47atomic_t fscache_n_retrievals_ok;
  48atomic_t fscache_n_retrievals_wait;
  49atomic_t fscache_n_retrievals_nodata;
  50atomic_t fscache_n_retrievals_nobufs;
  51atomic_t fscache_n_retrievals_intr;
  52atomic_t fscache_n_retrievals_nomem;
  53atomic_t fscache_n_retrievals_object_dead;
  54atomic_t fscache_n_retrieval_ops;
  55atomic_t fscache_n_retrieval_op_waits;
  56
  57atomic_t fscache_n_stores;
  58atomic_t fscache_n_stores_ok;
  59atomic_t fscache_n_stores_again;
  60atomic_t fscache_n_stores_nobufs;
  61atomic_t fscache_n_stores_oom;
  62atomic_t fscache_n_store_ops;
  63atomic_t fscache_n_store_calls;
  64atomic_t fscache_n_store_pages;
  65atomic_t fscache_n_store_radix_deletes;
  66atomic_t fscache_n_store_pages_over_limit;
  67
  68atomic_t fscache_n_store_vmscan_not_storing;
  69atomic_t fscache_n_store_vmscan_gone;
  70atomic_t fscache_n_store_vmscan_busy;
  71atomic_t fscache_n_store_vmscan_cancelled;
  72atomic_t fscache_n_store_vmscan_wait;
  73
  74atomic_t fscache_n_marks;
  75atomic_t fscache_n_uncaches;
  76
  77atomic_t fscache_n_acquires;
  78atomic_t fscache_n_acquires_null;
  79atomic_t fscache_n_acquires_no_cache;
  80atomic_t fscache_n_acquires_ok;
  81atomic_t fscache_n_acquires_nobufs;
  82atomic_t fscache_n_acquires_oom;
  83
  84atomic_t fscache_n_invalidates;
  85atomic_t fscache_n_invalidates_run;
  86
  87atomic_t fscache_n_updates;
  88atomic_t fscache_n_updates_null;
  89atomic_t fscache_n_updates_run;
  90
  91atomic_t fscache_n_relinquishes;
  92atomic_t fscache_n_relinquishes_null;
  93atomic_t fscache_n_relinquishes_waitcrt;
  94atomic_t fscache_n_relinquishes_retire;
  95
  96atomic_t fscache_n_cookie_index;
  97atomic_t fscache_n_cookie_data;
  98atomic_t fscache_n_cookie_special;
  99
 100atomic_t fscache_n_object_alloc;
 101atomic_t fscache_n_object_no_alloc;
 102atomic_t fscache_n_object_lookups;
 103atomic_t fscache_n_object_lookups_negative;
 104atomic_t fscache_n_object_lookups_positive;
 105atomic_t fscache_n_object_lookups_timed_out;
 106atomic_t fscache_n_object_created;
 107atomic_t fscache_n_object_avail;
 108atomic_t fscache_n_object_dead;
 109
 110atomic_t fscache_n_checkaux_none;
 111atomic_t fscache_n_checkaux_okay;
 112atomic_t fscache_n_checkaux_update;
 113atomic_t fscache_n_checkaux_obsolete;
 114
 115atomic_t fscache_n_cop_alloc_object;
 116atomic_t fscache_n_cop_lookup_object;
 117atomic_t fscache_n_cop_lookup_complete;
 118atomic_t fscache_n_cop_grab_object;
 119atomic_t fscache_n_cop_invalidate_object;
 120atomic_t fscache_n_cop_update_object;
 121atomic_t fscache_n_cop_drop_object;
 122atomic_t fscache_n_cop_put_object;
 123atomic_t fscache_n_cop_sync_cache;
 124atomic_t fscache_n_cop_attr_changed;
 125atomic_t fscache_n_cop_read_or_alloc_page;
 126atomic_t fscache_n_cop_read_or_alloc_pages;
 127atomic_t fscache_n_cop_allocate_page;
 128atomic_t fscache_n_cop_allocate_pages;
 129atomic_t fscache_n_cop_write_page;
 130atomic_t fscache_n_cop_uncache_page;
 131atomic_t fscache_n_cop_dissociate_pages;
 132
 133/*
 134 * display the general statistics
 135 */
 136static int fscache_stats_show(struct seq_file *m, void *v)
 137{
 138        seq_puts(m, "FS-Cache statistics\n");
 139
 140        seq_printf(m, "Cookies: idx=%u dat=%u spc=%u\n",
 141                   atomic_read(&fscache_n_cookie_index),
 142                   atomic_read(&fscache_n_cookie_data),
 143                   atomic_read(&fscache_n_cookie_special));
 144
 145        seq_printf(m, "Objects: alc=%u nal=%u avl=%u ded=%u\n",
 146                   atomic_read(&fscache_n_object_alloc),
 147                   atomic_read(&fscache_n_object_no_alloc),
 148                   atomic_read(&fscache_n_object_avail),
 149                   atomic_read(&fscache_n_object_dead));
 150        seq_printf(m, "ChkAux : non=%u ok=%u upd=%u obs=%u\n",
 151                   atomic_read(&fscache_n_checkaux_none),
 152                   atomic_read(&fscache_n_checkaux_okay),
 153                   atomic_read(&fscache_n_checkaux_update),
 154                   atomic_read(&fscache_n_checkaux_obsolete));
 155
 156        seq_printf(m, "Pages  : mrk=%u unc=%u\n",
 157                   atomic_read(&fscache_n_marks),
 158                   atomic_read(&fscache_n_uncaches));
 159
 160        seq_printf(m, "Acquire: n=%u nul=%u noc=%u ok=%u nbf=%u"
 161                   " oom=%u\n",
 162                   atomic_read(&fscache_n_acquires),
 163                   atomic_read(&fscache_n_acquires_null),
 164                   atomic_read(&fscache_n_acquires_no_cache),
 165                   atomic_read(&fscache_n_acquires_ok),
 166                   atomic_read(&fscache_n_acquires_nobufs),
 167                   atomic_read(&fscache_n_acquires_oom));
 168
 169        seq_printf(m, "Lookups: n=%u neg=%u pos=%u crt=%u tmo=%u\n",
 170                   atomic_read(&fscache_n_object_lookups),
 171                   atomic_read(&fscache_n_object_lookups_negative),
 172                   atomic_read(&fscache_n_object_lookups_positive),
 173                   atomic_read(&fscache_n_object_created),
 174                   atomic_read(&fscache_n_object_lookups_timed_out));
 175
 176        seq_printf(m, "Invals : n=%u run=%u\n",
 177                   atomic_read(&fscache_n_invalidates),
 178                   atomic_read(&fscache_n_invalidates_run));
 179
 180        seq_printf(m, "Updates: n=%u nul=%u run=%u\n",
 181                   atomic_read(&fscache_n_updates),
 182                   atomic_read(&fscache_n_updates_null),
 183                   atomic_read(&fscache_n_updates_run));
 184
 185        seq_printf(m, "Relinqs: n=%u nul=%u wcr=%u rtr=%u\n",
 186                   atomic_read(&fscache_n_relinquishes),
 187                   atomic_read(&fscache_n_relinquishes_null),
 188                   atomic_read(&fscache_n_relinquishes_waitcrt),
 189                   atomic_read(&fscache_n_relinquishes_retire));
 190
 191        seq_printf(m, "AttrChg: n=%u ok=%u nbf=%u oom=%u run=%u\n",
 192                   atomic_read(&fscache_n_attr_changed),
 193                   atomic_read(&fscache_n_attr_changed_ok),
 194                   atomic_read(&fscache_n_attr_changed_nobufs),
 195                   atomic_read(&fscache_n_attr_changed_nomem),
 196                   atomic_read(&fscache_n_attr_changed_calls));
 197
 198        seq_printf(m, "Allocs : n=%u ok=%u wt=%u nbf=%u int=%u\n",
 199                   atomic_read(&fscache_n_allocs),
 200                   atomic_read(&fscache_n_allocs_ok),
 201                   atomic_read(&fscache_n_allocs_wait),
 202                   atomic_read(&fscache_n_allocs_nobufs),
 203                   atomic_read(&fscache_n_allocs_intr));
 204        seq_printf(m, "Allocs : ops=%u owt=%u abt=%u\n",
 205                   atomic_read(&fscache_n_alloc_ops),
 206                   atomic_read(&fscache_n_alloc_op_waits),
 207                   atomic_read(&fscache_n_allocs_object_dead));
 208
 209        seq_printf(m, "Retrvls: n=%u ok=%u wt=%u nod=%u nbf=%u"
 210                   " int=%u oom=%u\n",
 211                   atomic_read(&fscache_n_retrievals),
 212                   atomic_read(&fscache_n_retrievals_ok),
 213                   atomic_read(&fscache_n_retrievals_wait),
 214                   atomic_read(&fscache_n_retrievals_nodata),
 215                   atomic_read(&fscache_n_retrievals_nobufs),
 216                   atomic_read(&fscache_n_retrievals_intr),
 217                   atomic_read(&fscache_n_retrievals_nomem));
 218        seq_printf(m, "Retrvls: ops=%u owt=%u abt=%u\n",
 219                   atomic_read(&fscache_n_retrieval_ops),
 220                   atomic_read(&fscache_n_retrieval_op_waits),
 221                   atomic_read(&fscache_n_retrievals_object_dead));
 222
 223        seq_printf(m, "Stores : n=%u ok=%u agn=%u nbf=%u oom=%u\n",
 224                   atomic_read(&fscache_n_stores),
 225                   atomic_read(&fscache_n_stores_ok),
 226                   atomic_read(&fscache_n_stores_again),
 227                   atomic_read(&fscache_n_stores_nobufs),
 228                   atomic_read(&fscache_n_stores_oom));
 229        seq_printf(m, "Stores : ops=%u run=%u pgs=%u rxd=%u olm=%u\n",
 230                   atomic_read(&fscache_n_store_ops),
 231                   atomic_read(&fscache_n_store_calls),
 232                   atomic_read(&fscache_n_store_pages),
 233                   atomic_read(&fscache_n_store_radix_deletes),
 234                   atomic_read(&fscache_n_store_pages_over_limit));
 235
 236        seq_printf(m, "VmScan : nos=%u gon=%u bsy=%u can=%u wt=%u\n",
 237                   atomic_read(&fscache_n_store_vmscan_not_storing),
 238                   atomic_read(&fscache_n_store_vmscan_gone),
 239                   atomic_read(&fscache_n_store_vmscan_busy),
 240                   atomic_read(&fscache_n_store_vmscan_cancelled),
 241                   atomic_read(&fscache_n_store_vmscan_wait));
 242
 243        seq_printf(m, "Ops    : pend=%u run=%u enq=%u can=%u rej=%u\n",
 244                   atomic_read(&fscache_n_op_pend),
 245                   atomic_read(&fscache_n_op_run),
 246                   atomic_read(&fscache_n_op_enqueue),
 247                   atomic_read(&fscache_n_op_cancelled),
 248                   atomic_read(&fscache_n_op_rejected));
 249        seq_printf(m, "Ops    : dfr=%u rel=%u gc=%u\n",
 250                   atomic_read(&fscache_n_op_deferred_release),
 251                   atomic_read(&fscache_n_op_release),
 252                   atomic_read(&fscache_n_op_gc));
 253
 254        seq_printf(m, "CacheOp: alo=%d luo=%d luc=%d gro=%d\n",
 255                   atomic_read(&fscache_n_cop_alloc_object),
 256                   atomic_read(&fscache_n_cop_lookup_object),
 257                   atomic_read(&fscache_n_cop_lookup_complete),
 258                   atomic_read(&fscache_n_cop_grab_object));
 259        seq_printf(m, "CacheOp: inv=%d upo=%d dro=%d pto=%d atc=%d syn=%d\n",
 260                   atomic_read(&fscache_n_cop_invalidate_object),
 261                   atomic_read(&fscache_n_cop_update_object),
 262                   atomic_read(&fscache_n_cop_drop_object),
 263                   atomic_read(&fscache_n_cop_put_object),
 264                   atomic_read(&fscache_n_cop_attr_changed),
 265                   atomic_read(&fscache_n_cop_sync_cache));
 266        seq_printf(m, "CacheOp: rap=%d ras=%d alp=%d als=%d wrp=%d ucp=%d dsp=%d\n",
 267                   atomic_read(&fscache_n_cop_read_or_alloc_page),
 268                   atomic_read(&fscache_n_cop_read_or_alloc_pages),
 269                   atomic_read(&fscache_n_cop_allocate_page),
 270                   atomic_read(&fscache_n_cop_allocate_pages),
 271                   atomic_read(&fscache_n_cop_write_page),
 272                   atomic_read(&fscache_n_cop_uncache_page),
 273                   atomic_read(&fscache_n_cop_dissociate_pages));
 274        return 0;
 275}
 276
 277/*
 278 * open "/proc/fs/fscache/stats" allowing provision of a statistical summary
 279 */
 280static int fscache_stats_open(struct inode *inode, struct file *file)
 281{
 282        return single_open(file, fscache_stats_show, NULL);
 283}
 284
 285const struct file_operations fscache_stats_fops = {
 286        .owner          = THIS_MODULE,
 287        .open           = fscache_stats_open,
 288        .read           = seq_read,
 289        .llseek         = seq_lseek,
 290        .release        = single_release,
 291};
 292