git://bbs.cooldavid.org / net-next-2.6.git / blame
| Commit | Line | Data |
|---|---|---|
| 7394daa8 DH |
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 | */ | |
| 21 | atomic_t fscache_n_op_pend; | |
| 22 | atomic_t fscache_n_op_run; | |
| 23 | atomic_t fscache_n_op_enqueue; | |
| 24 | atomic_t fscache_n_op_requeue; | |
| 25 | atomic_t fscache_n_op_deferred_release; | |
| 26 | atomic_t fscache_n_op_release; | |
| 27 | atomic_t fscache_n_op_gc; | |
| 5753c441 | 28 | atomic_t fscache_n_op_cancelled; |
| e3d4d28b | 29 | atomic_t fscache_n_op_rejected; |
| 7394daa8 DH |
30 | |
| 31 | atomic_t fscache_n_attr_changed; | |
| 32 | atomic_t fscache_n_attr_changed_ok; | |
| 33 | atomic_t fscache_n_attr_changed_nobufs; | |
| 34 | atomic_t fscache_n_attr_changed_nomem; | |
| 35 | atomic_t fscache_n_attr_changed_calls; | |
| 36 | ||
| 37 | atomic_t fscache_n_allocs; | |
| 38 | atomic_t fscache_n_allocs_ok; | |
| 39 | atomic_t fscache_n_allocs_wait; | |
| 40 | atomic_t fscache_n_allocs_nobufs; | |
| 5753c441 | 41 | atomic_t fscache_n_allocs_intr; |
| 60d543ca | 42 | atomic_t fscache_n_allocs_object_dead; |
| 7394daa8 DH |
43 | atomic_t fscache_n_alloc_ops; |
| 44 | atomic_t fscache_n_alloc_op_waits; | |
| 45 | ||
| 46 | atomic_t fscache_n_retrievals; | |
| 47 | atomic_t fscache_n_retrievals_ok; | |
| 48 | atomic_t fscache_n_retrievals_wait; | |
| 49 | atomic_t fscache_n_retrievals_nodata; | |
| 50 | atomic_t fscache_n_retrievals_nobufs; | |
| 51 | atomic_t fscache_n_retrievals_intr; | |
| 52 | atomic_t fscache_n_retrievals_nomem; | |
| 60d543ca | 53 | atomic_t fscache_n_retrievals_object_dead; |
| 7394daa8 DH |
54 | atomic_t fscache_n_retrieval_ops; |
| 55 | atomic_t fscache_n_retrieval_op_waits; | |
| 56 | ||
| 57 | atomic_t fscache_n_stores; | |
| 58 | atomic_t fscache_n_stores_ok; | |
| 59 | atomic_t fscache_n_stores_again; | |
| 60 | atomic_t fscache_n_stores_nobufs; | |
| 61 | atomic_t fscache_n_stores_oom; | |
| 62 | atomic_t fscache_n_store_ops; | |
| 63 | atomic_t fscache_n_store_calls; | |
| 1bccf513 DH |
64 | atomic_t fscache_n_store_pages; |
| 65 | atomic_t fscache_n_store_radix_deletes; | |
| 66 | atomic_t fscache_n_store_pages_over_limit; | |
| 7394daa8 | 67 | |
| 201a1542 DH |
68 | atomic_t fscache_n_store_vmscan_not_storing; |
| 69 | atomic_t fscache_n_store_vmscan_gone; | |
| 70 | atomic_t fscache_n_store_vmscan_busy; | |
| 71 | atomic_t fscache_n_store_vmscan_cancelled; | |
| 72 | ||
| 7394daa8 DH |
73 | atomic_t fscache_n_marks; |
| 74 | atomic_t fscache_n_uncaches; | |
| 75 | ||
| 76 | atomic_t fscache_n_acquires; | |
| 77 | atomic_t fscache_n_acquires_null; | |
| 78 | atomic_t fscache_n_acquires_no_cache; | |
| 79 | atomic_t fscache_n_acquires_ok; | |
| 80 | atomic_t fscache_n_acquires_nobufs; | |
| 81 | atomic_t fscache_n_acquires_oom; | |
| 82 | ||
| 83 | atomic_t fscache_n_updates; | |
| 84 | atomic_t fscache_n_updates_null; | |
| 85 | atomic_t fscache_n_updates_run; | |
| 86 | ||
| 87 | atomic_t fscache_n_relinquishes; | |
| 88 | atomic_t fscache_n_relinquishes_null; | |
| 89 | atomic_t fscache_n_relinquishes_waitcrt; | |
| 2175bb06 | 90 | atomic_t fscache_n_relinquishes_retire; |
| 7394daa8 DH |
91 | |
| 92 | atomic_t fscache_n_cookie_index; | |
| 93 | atomic_t fscache_n_cookie_data; | |
| 94 | atomic_t fscache_n_cookie_special; | |
| 95 | ||
| 96 | atomic_t fscache_n_object_alloc; | |
| 97 | atomic_t fscache_n_object_no_alloc; | |
| 98 | atomic_t fscache_n_object_lookups; | |
| 99 | atomic_t fscache_n_object_lookups_negative; | |
| 100 | atomic_t fscache_n_object_lookups_positive; | |
| fee096de | 101 | atomic_t fscache_n_object_lookups_timed_out; |
| 7394daa8 DH |
102 | atomic_t fscache_n_object_created; |
| 103 | atomic_t fscache_n_object_avail; | |
| 104 | atomic_t fscache_n_object_dead; | |
| 105 | ||
| 106 | atomic_t fscache_n_checkaux_none; | |
| 107 | atomic_t fscache_n_checkaux_okay; | |
| 108 | atomic_t fscache_n_checkaux_update; | |
| 109 | atomic_t fscache_n_checkaux_obsolete; | |
| 110 | ||
| 52bd75fd DH |
111 | atomic_t fscache_n_cop_alloc_object; |
| 112 | atomic_t fscache_n_cop_lookup_object; | |
| 113 | atomic_t fscache_n_cop_lookup_complete; | |
| 114 | atomic_t fscache_n_cop_grab_object; | |
| 115 | atomic_t fscache_n_cop_update_object; | |
| 116 | atomic_t fscache_n_cop_drop_object; | |
| 117 | atomic_t fscache_n_cop_put_object; | |
| 118 | atomic_t fscache_n_cop_sync_cache; | |
| 119 | atomic_t fscache_n_cop_attr_changed; | |
| 120 | atomic_t fscache_n_cop_read_or_alloc_page; | |
| 121 | atomic_t fscache_n_cop_read_or_alloc_pages; | |
| 122 | atomic_t fscache_n_cop_allocate_page; | |
| 123 | atomic_t fscache_n_cop_allocate_pages; | |
| 124 | atomic_t fscache_n_cop_write_page; | |
| 125 | atomic_t fscache_n_cop_uncache_page; | |
| 126 | atomic_t fscache_n_cop_dissociate_pages; | |
| 127 | ||
| 7394daa8 DH |
128 | /* |
| 129 | * display the general statistics | |
| 130 | */ | |
| 131 | static int fscache_stats_show(struct seq_file *m, void *v) | |
| 132 | { | |
| 133 | seq_puts(m, "FS-Cache statistics\n"); | |
| 134 | ||
| 135 | seq_printf(m, "Cookies: idx=%u dat=%u spc=%u\n", | |
| 136 | atomic_read(&fscache_n_cookie_index), | |
| 137 | atomic_read(&fscache_n_cookie_data), | |
| 138 | atomic_read(&fscache_n_cookie_special)); | |
| 139 | ||
| 140 | seq_printf(m, "Objects: alc=%u nal=%u avl=%u ded=%u\n", | |
| 141 | atomic_read(&fscache_n_object_alloc), | |
| 142 | atomic_read(&fscache_n_object_no_alloc), | |
| 143 | atomic_read(&fscache_n_object_avail), | |
| 144 | atomic_read(&fscache_n_object_dead)); | |
| 145 | seq_printf(m, "ChkAux : non=%u ok=%u upd=%u obs=%u\n", | |
| 146 | atomic_read(&fscache_n_checkaux_none), | |
| 147 | atomic_read(&fscache_n_checkaux_okay), | |
| 148 | atomic_read(&fscache_n_checkaux_update), | |
| 149 | atomic_read(&fscache_n_checkaux_obsolete)); | |
| 150 | ||
| 151 | seq_printf(m, "Pages : mrk=%u unc=%u\n", | |
| 152 | atomic_read(&fscache_n_marks), | |
| 153 | atomic_read(&fscache_n_uncaches)); | |
| 154 | ||
| 155 | seq_printf(m, "Acquire: n=%u nul=%u noc=%u ok=%u nbf=%u" | |
| 156 | " oom=%u\n", | |
| 157 | atomic_read(&fscache_n_acquires), | |
| 158 | atomic_read(&fscache_n_acquires_null), | |
| 159 | atomic_read(&fscache_n_acquires_no_cache), | |
| 160 | atomic_read(&fscache_n_acquires_ok), | |
| 161 | atomic_read(&fscache_n_acquires_nobufs), | |
| 162 | atomic_read(&fscache_n_acquires_oom)); | |
| 163 | ||
| fee096de | 164 | seq_printf(m, "Lookups: n=%u neg=%u pos=%u crt=%u tmo=%u\n", |
| 7394daa8 DH |
165 | atomic_read(&fscache_n_object_lookups), |
| 166 | atomic_read(&fscache_n_object_lookups_negative), | |
| 167 | atomic_read(&fscache_n_object_lookups_positive), | |
| cc4fc29e DH |
168 | atomic_read(&fscache_n_object_created), |
| 169 | atomic_read(&fscache_n_object_lookups_timed_out)); | |
| 7394daa8 DH |
170 | |
| 171 | seq_printf(m, "Updates: n=%u nul=%u run=%u\n", | |
| 172 | atomic_read(&fscache_n_updates), | |
| 173 | atomic_read(&fscache_n_updates_null), | |
| 174 | atomic_read(&fscache_n_updates_run)); | |
| 175 | ||
| 2175bb06 | 176 | seq_printf(m, "Relinqs: n=%u nul=%u wcr=%u rtr=%u\n", |
| 7394daa8 DH |
177 | atomic_read(&fscache_n_relinquishes), |
| 178 | atomic_read(&fscache_n_relinquishes_null), | |
| 2175bb06 DH |
179 | atomic_read(&fscache_n_relinquishes_waitcrt), |
| 180 | atomic_read(&fscache_n_relinquishes_retire)); | |
| 7394daa8 DH |
181 | |
| 182 | seq_printf(m, "AttrChg: n=%u ok=%u nbf=%u oom=%u run=%u\n", | |
| 183 | atomic_read(&fscache_n_attr_changed), | |
| 184 | atomic_read(&fscache_n_attr_changed_ok), | |
| 185 | atomic_read(&fscache_n_attr_changed_nobufs), | |
| 186 | atomic_read(&fscache_n_attr_changed_nomem), | |
| 187 | atomic_read(&fscache_n_attr_changed_calls)); | |
| 188 | ||
| 5753c441 | 189 | seq_printf(m, "Allocs : n=%u ok=%u wt=%u nbf=%u int=%u\n", |
| 7394daa8 DH |
190 | atomic_read(&fscache_n_allocs), |
| 191 | atomic_read(&fscache_n_allocs_ok), | |
| 192 | atomic_read(&fscache_n_allocs_wait), | |
| 5753c441 DH |
193 | atomic_read(&fscache_n_allocs_nobufs), |
| 194 | atomic_read(&fscache_n_allocs_intr)); | |
| 60d543ca | 195 | seq_printf(m, "Allocs : ops=%u owt=%u abt=%u\n", |
| 7394daa8 | 196 | atomic_read(&fscache_n_alloc_ops), |
| 60d543ca DH |
197 | atomic_read(&fscache_n_alloc_op_waits), |
| 198 | atomic_read(&fscache_n_allocs_object_dead)); | |
| 7394daa8 DH |
199 | |
| 200 | seq_printf(m, "Retrvls: n=%u ok=%u wt=%u nod=%u nbf=%u" | |
| 201 | " int=%u oom=%u\n", | |
| 202 | atomic_read(&fscache_n_retrievals), | |
| 203 | atomic_read(&fscache_n_retrievals_ok), | |
| 204 | atomic_read(&fscache_n_retrievals_wait), | |
| 205 | atomic_read(&fscache_n_retrievals_nodata), | |
| 206 | atomic_read(&fscache_n_retrievals_nobufs), | |
| 207 | atomic_read(&fscache_n_retrievals_intr), | |
| 208 | atomic_read(&fscache_n_retrievals_nomem)); | |
| 60d543ca | 209 | seq_printf(m, "Retrvls: ops=%u owt=%u abt=%u\n", |
| 7394daa8 | 210 | atomic_read(&fscache_n_retrieval_ops), |
| 60d543ca DH |
211 | atomic_read(&fscache_n_retrieval_op_waits), |
| 212 | atomic_read(&fscache_n_retrievals_object_dead)); | |
| 7394daa8 DH |
213 | |
| 214 | seq_printf(m, "Stores : n=%u ok=%u agn=%u nbf=%u oom=%u\n", | |
| 215 | atomic_read(&fscache_n_stores), | |
| 216 | atomic_read(&fscache_n_stores_ok), | |
| 217 | atomic_read(&fscache_n_stores_again), | |
| 218 | atomic_read(&fscache_n_stores_nobufs), | |
| 219 | atomic_read(&fscache_n_stores_oom)); | |
| 1bccf513 | 220 | seq_printf(m, "Stores : ops=%u run=%u pgs=%u rxd=%u olm=%u\n", |
| 7394daa8 | 221 | atomic_read(&fscache_n_store_ops), |
| 1bccf513 DH |
222 | atomic_read(&fscache_n_store_calls), |
| 223 | atomic_read(&fscache_n_store_pages), | |
| 224 | atomic_read(&fscache_n_store_radix_deletes), | |
| 225 | atomic_read(&fscache_n_store_pages_over_limit)); | |
| 7394daa8 | 226 | |
| 201a1542 DH |
227 | seq_printf(m, "VmScan : nos=%u gon=%u bsy=%u can=%u\n", |
| 228 | atomic_read(&fscache_n_store_vmscan_not_storing), | |
| 229 | atomic_read(&fscache_n_store_vmscan_gone), | |
| 230 | atomic_read(&fscache_n_store_vmscan_busy), | |
| 231 | atomic_read(&fscache_n_store_vmscan_cancelled)); | |
| 232 | ||
| e3d4d28b | 233 | seq_printf(m, "Ops : pend=%u run=%u enq=%u can=%u rej=%u\n", |
| 7394daa8 DH |
234 | atomic_read(&fscache_n_op_pend), |
| 235 | atomic_read(&fscache_n_op_run), | |
| 5753c441 | 236 | atomic_read(&fscache_n_op_enqueue), |
| e3d4d28b DH |
237 | atomic_read(&fscache_n_op_cancelled), |
| 238 | atomic_read(&fscache_n_op_rejected)); | |
| 7394daa8 DH |
239 | seq_printf(m, "Ops : dfr=%u rel=%u gc=%u\n", |
| 240 | atomic_read(&fscache_n_op_deferred_release), | |
| 241 | atomic_read(&fscache_n_op_release), | |
| 242 | atomic_read(&fscache_n_op_gc)); | |
| 52bd75fd DH |
243 | |
| 244 | seq_printf(m, "CacheOp: alo=%d luo=%d luc=%d gro=%d\n", | |
| 245 | atomic_read(&fscache_n_cop_alloc_object), | |
| 246 | atomic_read(&fscache_n_cop_lookup_object), | |
| 247 | atomic_read(&fscache_n_cop_lookup_complete), | |
| 248 | atomic_read(&fscache_n_cop_grab_object)); | |
| 249 | seq_printf(m, "CacheOp: upo=%d dro=%d pto=%d atc=%d syn=%d\n", | |
| 250 | atomic_read(&fscache_n_cop_update_object), | |
| 251 | atomic_read(&fscache_n_cop_drop_object), | |
| 252 | atomic_read(&fscache_n_cop_put_object), | |
| 253 | atomic_read(&fscache_n_cop_attr_changed), | |
| 254 | atomic_read(&fscache_n_cop_sync_cache)); | |
| 255 | seq_printf(m, "CacheOp: rap=%d ras=%d alp=%d als=%d wrp=%d ucp=%d dsp=%d\n", | |
| 256 | atomic_read(&fscache_n_cop_read_or_alloc_page), | |
| 257 | atomic_read(&fscache_n_cop_read_or_alloc_pages), | |
| 258 | atomic_read(&fscache_n_cop_allocate_page), | |
| 259 | atomic_read(&fscache_n_cop_allocate_pages), | |
| 260 | atomic_read(&fscache_n_cop_write_page), | |
| 261 | atomic_read(&fscache_n_cop_uncache_page), | |
| 262 | atomic_read(&fscache_n_cop_dissociate_pages)); | |
| 7394daa8 DH |
263 | return 0; |
| 264 | } | |
| 265 | ||
| 266 | /* | |
| 267 | * open "/proc/fs/fscache/stats" allowing provision of a statistical summary | |
| 268 | */ | |
| 269 | static int fscache_stats_open(struct inode *inode, struct file *file) | |
| 270 | { | |
| 271 | return single_open(file, fscache_stats_show, NULL); | |
| 272 | } | |
| 273 | ||
| 274 | const struct file_operations fscache_stats_fops = { | |
| 275 | .owner = THIS_MODULE, | |
| 276 | .open = fscache_stats_open, | |
| 277 | .read = seq_read, | |
| 278 | .llseek = seq_lseek, | |
| 279 | .release = seq_release, | |
| 280 | }; |