blob: 7cfa0aacdf6d53c41768150f80f27bc2b7cb18c0 [file] [log] [blame]
David Howells7394daa2009-04-03 16:42:37 +01001/* 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;
David Howells03cdd0e2015-02-25 13:21:15 +000026atomic_t fscache_n_op_initialised;
David Howells7394daa2009-04-03 16:42:37 +010027atomic_t fscache_n_op_release;
28atomic_t fscache_n_op_gc;
David Howells5753c442009-11-19 18:11:19 +000029atomic_t fscache_n_op_cancelled;
David Howellse3d4d282009-11-19 18:11:32 +000030atomic_t fscache_n_op_rejected;
David Howells7394daa2009-04-03 16:42:37 +010031
32atomic_t fscache_n_attr_changed;
33atomic_t fscache_n_attr_changed_ok;
34atomic_t fscache_n_attr_changed_nobufs;
35atomic_t fscache_n_attr_changed_nomem;
36atomic_t fscache_n_attr_changed_calls;
37
38atomic_t fscache_n_allocs;
39atomic_t fscache_n_allocs_ok;
40atomic_t fscache_n_allocs_wait;
41atomic_t fscache_n_allocs_nobufs;
David Howells5753c442009-11-19 18:11:19 +000042atomic_t fscache_n_allocs_intr;
David Howells60d543c2009-11-19 18:11:45 +000043atomic_t fscache_n_allocs_object_dead;
David Howells7394daa2009-04-03 16:42:37 +010044atomic_t fscache_n_alloc_ops;
45atomic_t fscache_n_alloc_op_waits;
46
47atomic_t fscache_n_retrievals;
48atomic_t fscache_n_retrievals_ok;
49atomic_t fscache_n_retrievals_wait;
50atomic_t fscache_n_retrievals_nodata;
51atomic_t fscache_n_retrievals_nobufs;
52atomic_t fscache_n_retrievals_intr;
53atomic_t fscache_n_retrievals_nomem;
David Howells60d543c2009-11-19 18:11:45 +000054atomic_t fscache_n_retrievals_object_dead;
David Howells7394daa2009-04-03 16:42:37 +010055atomic_t fscache_n_retrieval_ops;
56atomic_t fscache_n_retrieval_op_waits;
57
58atomic_t fscache_n_stores;
59atomic_t fscache_n_stores_ok;
60atomic_t fscache_n_stores_again;
61atomic_t fscache_n_stores_nobufs;
62atomic_t fscache_n_stores_oom;
63atomic_t fscache_n_store_ops;
64atomic_t fscache_n_store_calls;
David Howells1bccf512009-11-19 18:11:25 +000065atomic_t fscache_n_store_pages;
66atomic_t fscache_n_store_radix_deletes;
67atomic_t fscache_n_store_pages_over_limit;
David Howells7394daa2009-04-03 16:42:37 +010068
David Howells201a1542009-11-19 18:11:35 +000069atomic_t fscache_n_store_vmscan_not_storing;
70atomic_t fscache_n_store_vmscan_gone;
71atomic_t fscache_n_store_vmscan_busy;
72atomic_t fscache_n_store_vmscan_cancelled;
David Howells8c209ce2012-12-05 13:34:49 +000073atomic_t fscache_n_store_vmscan_wait;
David Howells201a1542009-11-19 18:11:35 +000074
David Howells7394daa2009-04-03 16:42:37 +010075atomic_t fscache_n_marks;
76atomic_t fscache_n_uncaches;
77
78atomic_t fscache_n_acquires;
79atomic_t fscache_n_acquires_null;
80atomic_t fscache_n_acquires_no_cache;
81atomic_t fscache_n_acquires_ok;
82atomic_t fscache_n_acquires_nobufs;
83atomic_t fscache_n_acquires_oom;
84
David Howellsef778e72012-12-20 21:52:36 +000085atomic_t fscache_n_invalidates;
86atomic_t fscache_n_invalidates_run;
87
David Howells7394daa2009-04-03 16:42:37 +010088atomic_t fscache_n_updates;
89atomic_t fscache_n_updates_null;
90atomic_t fscache_n_updates_run;
91
92atomic_t fscache_n_relinquishes;
93atomic_t fscache_n_relinquishes_null;
94atomic_t fscache_n_relinquishes_waitcrt;
David Howells2175bb02009-11-19 18:11:38 +000095atomic_t fscache_n_relinquishes_retire;
David Howells7394daa2009-04-03 16:42:37 +010096
97atomic_t fscache_n_cookie_index;
98atomic_t fscache_n_cookie_data;
99atomic_t fscache_n_cookie_special;
100
101atomic_t fscache_n_object_alloc;
102atomic_t fscache_n_object_no_alloc;
103atomic_t fscache_n_object_lookups;
104atomic_t fscache_n_object_lookups_negative;
105atomic_t fscache_n_object_lookups_positive;
David Howellsfee096d2009-11-19 18:12:05 +0000106atomic_t fscache_n_object_lookups_timed_out;
David Howells7394daa2009-04-03 16:42:37 +0100107atomic_t fscache_n_object_created;
108atomic_t fscache_n_object_avail;
109atomic_t fscache_n_object_dead;
110
111atomic_t fscache_n_checkaux_none;
112atomic_t fscache_n_checkaux_okay;
113atomic_t fscache_n_checkaux_update;
114atomic_t fscache_n_checkaux_obsolete;
115
David Howells52bd75f2009-11-19 18:11:08 +0000116atomic_t fscache_n_cop_alloc_object;
117atomic_t fscache_n_cop_lookup_object;
118atomic_t fscache_n_cop_lookup_complete;
119atomic_t fscache_n_cop_grab_object;
David Howellsef778e72012-12-20 21:52:36 +0000120atomic_t fscache_n_cop_invalidate_object;
David Howells52bd75f2009-11-19 18:11:08 +0000121atomic_t fscache_n_cop_update_object;
122atomic_t fscache_n_cop_drop_object;
123atomic_t fscache_n_cop_put_object;
124atomic_t fscache_n_cop_sync_cache;
125atomic_t fscache_n_cop_attr_changed;
126atomic_t fscache_n_cop_read_or_alloc_page;
127atomic_t fscache_n_cop_read_or_alloc_pages;
128atomic_t fscache_n_cop_allocate_page;
129atomic_t fscache_n_cop_allocate_pages;
130atomic_t fscache_n_cop_write_page;
131atomic_t fscache_n_cop_uncache_page;
132atomic_t fscache_n_cop_dissociate_pages;
133
David Howells182d9192015-02-19 23:47:31 +0000134atomic_t fscache_n_cache_no_space_reject;
135atomic_t fscache_n_cache_stale_objects;
136atomic_t fscache_n_cache_retired_objects;
137atomic_t fscache_n_cache_culled_objects;
138
David Howells7394daa2009-04-03 16:42:37 +0100139/*
140 * display the general statistics
141 */
142static int fscache_stats_show(struct seq_file *m, void *v)
143{
144 seq_puts(m, "FS-Cache statistics\n");
145
146 seq_printf(m, "Cookies: idx=%u dat=%u spc=%u\n",
147 atomic_read(&fscache_n_cookie_index),
148 atomic_read(&fscache_n_cookie_data),
149 atomic_read(&fscache_n_cookie_special));
150
151 seq_printf(m, "Objects: alc=%u nal=%u avl=%u ded=%u\n",
152 atomic_read(&fscache_n_object_alloc),
153 atomic_read(&fscache_n_object_no_alloc),
154 atomic_read(&fscache_n_object_avail),
155 atomic_read(&fscache_n_object_dead));
156 seq_printf(m, "ChkAux : non=%u ok=%u upd=%u obs=%u\n",
157 atomic_read(&fscache_n_checkaux_none),
158 atomic_read(&fscache_n_checkaux_okay),
159 atomic_read(&fscache_n_checkaux_update),
160 atomic_read(&fscache_n_checkaux_obsolete));
161
162 seq_printf(m, "Pages : mrk=%u unc=%u\n",
163 atomic_read(&fscache_n_marks),
164 atomic_read(&fscache_n_uncaches));
165
166 seq_printf(m, "Acquire: n=%u nul=%u noc=%u ok=%u nbf=%u"
167 " oom=%u\n",
168 atomic_read(&fscache_n_acquires),
169 atomic_read(&fscache_n_acquires_null),
170 atomic_read(&fscache_n_acquires_no_cache),
171 atomic_read(&fscache_n_acquires_ok),
172 atomic_read(&fscache_n_acquires_nobufs),
173 atomic_read(&fscache_n_acquires_oom));
174
David Howellsfee096d2009-11-19 18:12:05 +0000175 seq_printf(m, "Lookups: n=%u neg=%u pos=%u crt=%u tmo=%u\n",
David Howells7394daa2009-04-03 16:42:37 +0100176 atomic_read(&fscache_n_object_lookups),
177 atomic_read(&fscache_n_object_lookups_negative),
178 atomic_read(&fscache_n_object_lookups_positive),
David Howellscc4fc292010-04-06 14:35:09 -0700179 atomic_read(&fscache_n_object_created),
180 atomic_read(&fscache_n_object_lookups_timed_out));
David Howells7394daa2009-04-03 16:42:37 +0100181
David Howellsef778e72012-12-20 21:52:36 +0000182 seq_printf(m, "Invals : n=%u run=%u\n",
183 atomic_read(&fscache_n_invalidates),
184 atomic_read(&fscache_n_invalidates_run));
185
David Howells7394daa2009-04-03 16:42:37 +0100186 seq_printf(m, "Updates: n=%u nul=%u run=%u\n",
187 atomic_read(&fscache_n_updates),
188 atomic_read(&fscache_n_updates_null),
189 atomic_read(&fscache_n_updates_run));
190
David Howells2175bb02009-11-19 18:11:38 +0000191 seq_printf(m, "Relinqs: n=%u nul=%u wcr=%u rtr=%u\n",
David Howells7394daa2009-04-03 16:42:37 +0100192 atomic_read(&fscache_n_relinquishes),
193 atomic_read(&fscache_n_relinquishes_null),
David Howells2175bb02009-11-19 18:11:38 +0000194 atomic_read(&fscache_n_relinquishes_waitcrt),
195 atomic_read(&fscache_n_relinquishes_retire));
David Howells7394daa2009-04-03 16:42:37 +0100196
197 seq_printf(m, "AttrChg: n=%u ok=%u nbf=%u oom=%u run=%u\n",
198 atomic_read(&fscache_n_attr_changed),
199 atomic_read(&fscache_n_attr_changed_ok),
200 atomic_read(&fscache_n_attr_changed_nobufs),
201 atomic_read(&fscache_n_attr_changed_nomem),
202 atomic_read(&fscache_n_attr_changed_calls));
203
David Howells5753c442009-11-19 18:11:19 +0000204 seq_printf(m, "Allocs : n=%u ok=%u wt=%u nbf=%u int=%u\n",
David Howells7394daa2009-04-03 16:42:37 +0100205 atomic_read(&fscache_n_allocs),
206 atomic_read(&fscache_n_allocs_ok),
207 atomic_read(&fscache_n_allocs_wait),
David Howells5753c442009-11-19 18:11:19 +0000208 atomic_read(&fscache_n_allocs_nobufs),
209 atomic_read(&fscache_n_allocs_intr));
David Howells60d543c2009-11-19 18:11:45 +0000210 seq_printf(m, "Allocs : ops=%u owt=%u abt=%u\n",
David Howells7394daa2009-04-03 16:42:37 +0100211 atomic_read(&fscache_n_alloc_ops),
David Howells60d543c2009-11-19 18:11:45 +0000212 atomic_read(&fscache_n_alloc_op_waits),
213 atomic_read(&fscache_n_allocs_object_dead));
David Howells7394daa2009-04-03 16:42:37 +0100214
215 seq_printf(m, "Retrvls: n=%u ok=%u wt=%u nod=%u nbf=%u"
216 " int=%u oom=%u\n",
217 atomic_read(&fscache_n_retrievals),
218 atomic_read(&fscache_n_retrievals_ok),
219 atomic_read(&fscache_n_retrievals_wait),
220 atomic_read(&fscache_n_retrievals_nodata),
221 atomic_read(&fscache_n_retrievals_nobufs),
222 atomic_read(&fscache_n_retrievals_intr),
223 atomic_read(&fscache_n_retrievals_nomem));
David Howells60d543c2009-11-19 18:11:45 +0000224 seq_printf(m, "Retrvls: ops=%u owt=%u abt=%u\n",
David Howells7394daa2009-04-03 16:42:37 +0100225 atomic_read(&fscache_n_retrieval_ops),
David Howells60d543c2009-11-19 18:11:45 +0000226 atomic_read(&fscache_n_retrieval_op_waits),
227 atomic_read(&fscache_n_retrievals_object_dead));
David Howells7394daa2009-04-03 16:42:37 +0100228
229 seq_printf(m, "Stores : n=%u ok=%u agn=%u nbf=%u oom=%u\n",
230 atomic_read(&fscache_n_stores),
231 atomic_read(&fscache_n_stores_ok),
232 atomic_read(&fscache_n_stores_again),
233 atomic_read(&fscache_n_stores_nobufs),
234 atomic_read(&fscache_n_stores_oom));
David Howells1bccf512009-11-19 18:11:25 +0000235 seq_printf(m, "Stores : ops=%u run=%u pgs=%u rxd=%u olm=%u\n",
David Howells7394daa2009-04-03 16:42:37 +0100236 atomic_read(&fscache_n_store_ops),
David Howells1bccf512009-11-19 18:11:25 +0000237 atomic_read(&fscache_n_store_calls),
238 atomic_read(&fscache_n_store_pages),
239 atomic_read(&fscache_n_store_radix_deletes),
240 atomic_read(&fscache_n_store_pages_over_limit));
David Howells7394daa2009-04-03 16:42:37 +0100241
David Howells8c209ce2012-12-05 13:34:49 +0000242 seq_printf(m, "VmScan : nos=%u gon=%u bsy=%u can=%u wt=%u\n",
David Howells201a1542009-11-19 18:11:35 +0000243 atomic_read(&fscache_n_store_vmscan_not_storing),
244 atomic_read(&fscache_n_store_vmscan_gone),
245 atomic_read(&fscache_n_store_vmscan_busy),
David Howells8c209ce2012-12-05 13:34:49 +0000246 atomic_read(&fscache_n_store_vmscan_cancelled),
247 atomic_read(&fscache_n_store_vmscan_wait));
David Howells201a1542009-11-19 18:11:35 +0000248
David Howellse3d4d282009-11-19 18:11:32 +0000249 seq_printf(m, "Ops : pend=%u run=%u enq=%u can=%u rej=%u\n",
David Howells7394daa2009-04-03 16:42:37 +0100250 atomic_read(&fscache_n_op_pend),
251 atomic_read(&fscache_n_op_run),
David Howells5753c442009-11-19 18:11:19 +0000252 atomic_read(&fscache_n_op_enqueue),
David Howellse3d4d282009-11-19 18:11:32 +0000253 atomic_read(&fscache_n_op_cancelled),
254 atomic_read(&fscache_n_op_rejected));
David Howells03cdd0e2015-02-25 13:21:15 +0000255 seq_printf(m, "Ops : ini=%u dfr=%u rel=%u gc=%u\n",
256 atomic_read(&fscache_n_op_initialised),
David Howells7394daa2009-04-03 16:42:37 +0100257 atomic_read(&fscache_n_op_deferred_release),
258 atomic_read(&fscache_n_op_release),
259 atomic_read(&fscache_n_op_gc));
David Howells52bd75f2009-11-19 18:11:08 +0000260
261 seq_printf(m, "CacheOp: alo=%d luo=%d luc=%d gro=%d\n",
262 atomic_read(&fscache_n_cop_alloc_object),
263 atomic_read(&fscache_n_cop_lookup_object),
264 atomic_read(&fscache_n_cop_lookup_complete),
265 atomic_read(&fscache_n_cop_grab_object));
David Howellsef778e72012-12-20 21:52:36 +0000266 seq_printf(m, "CacheOp: inv=%d upo=%d dro=%d pto=%d atc=%d syn=%d\n",
267 atomic_read(&fscache_n_cop_invalidate_object),
David Howells52bd75f2009-11-19 18:11:08 +0000268 atomic_read(&fscache_n_cop_update_object),
269 atomic_read(&fscache_n_cop_drop_object),
270 atomic_read(&fscache_n_cop_put_object),
271 atomic_read(&fscache_n_cop_attr_changed),
272 atomic_read(&fscache_n_cop_sync_cache));
273 seq_printf(m, "CacheOp: rap=%d ras=%d alp=%d als=%d wrp=%d ucp=%d dsp=%d\n",
274 atomic_read(&fscache_n_cop_read_or_alloc_page),
275 atomic_read(&fscache_n_cop_read_or_alloc_pages),
276 atomic_read(&fscache_n_cop_allocate_page),
277 atomic_read(&fscache_n_cop_allocate_pages),
278 atomic_read(&fscache_n_cop_write_page),
279 atomic_read(&fscache_n_cop_uncache_page),
280 atomic_read(&fscache_n_cop_dissociate_pages));
David Howells182d9192015-02-19 23:47:31 +0000281 seq_printf(m, "CacheEv: nsp=%d stl=%d rtr=%d cul=%d\n",
282 atomic_read(&fscache_n_cache_no_space_reject),
283 atomic_read(&fscache_n_cache_stale_objects),
284 atomic_read(&fscache_n_cache_retired_objects),
285 atomic_read(&fscache_n_cache_culled_objects));
David Howells7394daa2009-04-03 16:42:37 +0100286 return 0;
287}
288
289/*
290 * open "/proc/fs/fscache/stats" allowing provision of a statistical summary
291 */
292static int fscache_stats_open(struct inode *inode, struct file *file)
293{
294 return single_open(file, fscache_stats_show, NULL);
295}
296
297const struct file_operations fscache_stats_fops = {
298 .owner = THIS_MODULE,
299 .open = fscache_stats_open,
300 .read = seq_read,
301 .llseek = seq_lseek,
Anurup mec686c92013-04-29 15:05:52 -0700302 .release = single_release,
David Howells7394daa2009-04-03 16:42:37 +0100303};