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Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
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 = seq_release,
291};