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_deferred_release;
25 atomic_t fscache_n_op_initialised;
26 atomic_t fscache_n_op_release;
27 atomic_t fscache_n_op_gc;
28 atomic_t fscache_n_op_cancelled;
29 atomic_t fscache_n_op_rejected;
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;
41 atomic_t fscache_n_allocs_intr;
42 atomic_t fscache_n_allocs_object_dead;
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;
53 atomic_t fscache_n_retrievals_object_dead;
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;
64 atomic_t fscache_n_store_pages;
65 atomic_t fscache_n_store_radix_deletes;
66 atomic_t fscache_n_store_pages_over_limit;
67 
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 atomic_t fscache_n_store_vmscan_wait;
73 
74 atomic_t fscache_n_marks;
75 atomic_t fscache_n_uncaches;
76 
77 atomic_t fscache_n_acquires;
78 atomic_t fscache_n_acquires_null;
79 atomic_t fscache_n_acquires_no_cache;
80 atomic_t fscache_n_acquires_ok;
81 atomic_t fscache_n_acquires_nobufs;
82 atomic_t fscache_n_acquires_oom;
83 
84 atomic_t fscache_n_invalidates;
85 atomic_t fscache_n_invalidates_run;
86 
87 atomic_t fscache_n_updates;
88 atomic_t fscache_n_updates_null;
89 atomic_t fscache_n_updates_run;
90 
91 atomic_t fscache_n_relinquishes;
92 atomic_t fscache_n_relinquishes_null;
93 atomic_t fscache_n_relinquishes_waitcrt;
94 atomic_t fscache_n_relinquishes_retire;
95 
96 atomic_t fscache_n_cookie_index;
97 atomic_t fscache_n_cookie_data;
98 atomic_t fscache_n_cookie_special;
99 
100 atomic_t fscache_n_object_alloc;
101 atomic_t fscache_n_object_no_alloc;
102 atomic_t fscache_n_object_lookups;
103 atomic_t fscache_n_object_lookups_negative;
104 atomic_t fscache_n_object_lookups_positive;
105 atomic_t fscache_n_object_lookups_timed_out;
106 atomic_t fscache_n_object_created;
107 atomic_t fscache_n_object_avail;
108 atomic_t fscache_n_object_dead;
109 
110 atomic_t fscache_n_checkaux_none;
111 atomic_t fscache_n_checkaux_okay;
112 atomic_t fscache_n_checkaux_update;
113 atomic_t fscache_n_checkaux_obsolete;
114 
115 atomic_t fscache_n_cop_alloc_object;
116 atomic_t fscache_n_cop_lookup_object;
117 atomic_t fscache_n_cop_lookup_complete;
118 atomic_t fscache_n_cop_grab_object;
119 atomic_t fscache_n_cop_invalidate_object;
120 atomic_t fscache_n_cop_update_object;
121 atomic_t fscache_n_cop_drop_object;
122 atomic_t fscache_n_cop_put_object;
123 atomic_t fscache_n_cop_sync_cache;
124 atomic_t fscache_n_cop_attr_changed;
125 atomic_t fscache_n_cop_read_or_alloc_page;
126 atomic_t fscache_n_cop_read_or_alloc_pages;
127 atomic_t fscache_n_cop_allocate_page;
128 atomic_t fscache_n_cop_allocate_pages;
129 atomic_t fscache_n_cop_write_page;
130 atomic_t fscache_n_cop_uncache_page;
131 atomic_t fscache_n_cop_dissociate_pages;
132 
133 atomic_t fscache_n_cache_no_space_reject;
134 atomic_t fscache_n_cache_stale_objects;
135 atomic_t fscache_n_cache_retired_objects;
136 atomic_t fscache_n_cache_culled_objects;
137 
138 /*
139  * display the general statistics
140  */
fscache_stats_show(struct seq_file * m,void * v)141 int fscache_stats_show(struct seq_file *m, void *v)
142 {
143 	seq_puts(m, "FS-Cache statistics\n");
144 
145 	seq_printf(m, "Cookies: idx=%u dat=%u spc=%u\n",
146 		   atomic_read(&fscache_n_cookie_index),
147 		   atomic_read(&fscache_n_cookie_data),
148 		   atomic_read(&fscache_n_cookie_special));
149 
150 	seq_printf(m, "Objects: alc=%u nal=%u avl=%u ded=%u\n",
151 		   atomic_read(&fscache_n_object_alloc),
152 		   atomic_read(&fscache_n_object_no_alloc),
153 		   atomic_read(&fscache_n_object_avail),
154 		   atomic_read(&fscache_n_object_dead));
155 	seq_printf(m, "ChkAux : non=%u ok=%u upd=%u obs=%u\n",
156 		   atomic_read(&fscache_n_checkaux_none),
157 		   atomic_read(&fscache_n_checkaux_okay),
158 		   atomic_read(&fscache_n_checkaux_update),
159 		   atomic_read(&fscache_n_checkaux_obsolete));
160 
161 	seq_printf(m, "Pages  : mrk=%u unc=%u\n",
162 		   atomic_read(&fscache_n_marks),
163 		   atomic_read(&fscache_n_uncaches));
164 
165 	seq_printf(m, "Acquire: n=%u nul=%u noc=%u ok=%u nbf=%u"
166 		   " oom=%u\n",
167 		   atomic_read(&fscache_n_acquires),
168 		   atomic_read(&fscache_n_acquires_null),
169 		   atomic_read(&fscache_n_acquires_no_cache),
170 		   atomic_read(&fscache_n_acquires_ok),
171 		   atomic_read(&fscache_n_acquires_nobufs),
172 		   atomic_read(&fscache_n_acquires_oom));
173 
174 	seq_printf(m, "Lookups: n=%u neg=%u pos=%u crt=%u tmo=%u\n",
175 		   atomic_read(&fscache_n_object_lookups),
176 		   atomic_read(&fscache_n_object_lookups_negative),
177 		   atomic_read(&fscache_n_object_lookups_positive),
178 		   atomic_read(&fscache_n_object_created),
179 		   atomic_read(&fscache_n_object_lookups_timed_out));
180 
181 	seq_printf(m, "Invals : n=%u run=%u\n",
182 		   atomic_read(&fscache_n_invalidates),
183 		   atomic_read(&fscache_n_invalidates_run));
184 
185 	seq_printf(m, "Updates: n=%u nul=%u run=%u\n",
186 		   atomic_read(&fscache_n_updates),
187 		   atomic_read(&fscache_n_updates_null),
188 		   atomic_read(&fscache_n_updates_run));
189 
190 	seq_printf(m, "Relinqs: n=%u nul=%u wcr=%u rtr=%u\n",
191 		   atomic_read(&fscache_n_relinquishes),
192 		   atomic_read(&fscache_n_relinquishes_null),
193 		   atomic_read(&fscache_n_relinquishes_waitcrt),
194 		   atomic_read(&fscache_n_relinquishes_retire));
195 
196 	seq_printf(m, "AttrChg: n=%u ok=%u nbf=%u oom=%u run=%u\n",
197 		   atomic_read(&fscache_n_attr_changed),
198 		   atomic_read(&fscache_n_attr_changed_ok),
199 		   atomic_read(&fscache_n_attr_changed_nobufs),
200 		   atomic_read(&fscache_n_attr_changed_nomem),
201 		   atomic_read(&fscache_n_attr_changed_calls));
202 
203 	seq_printf(m, "Allocs : n=%u ok=%u wt=%u nbf=%u int=%u\n",
204 		   atomic_read(&fscache_n_allocs),
205 		   atomic_read(&fscache_n_allocs_ok),
206 		   atomic_read(&fscache_n_allocs_wait),
207 		   atomic_read(&fscache_n_allocs_nobufs),
208 		   atomic_read(&fscache_n_allocs_intr));
209 	seq_printf(m, "Allocs : ops=%u owt=%u abt=%u\n",
210 		   atomic_read(&fscache_n_alloc_ops),
211 		   atomic_read(&fscache_n_alloc_op_waits),
212 		   atomic_read(&fscache_n_allocs_object_dead));
213 
214 	seq_printf(m, "Retrvls: n=%u ok=%u wt=%u nod=%u nbf=%u"
215 		   " int=%u oom=%u\n",
216 		   atomic_read(&fscache_n_retrievals),
217 		   atomic_read(&fscache_n_retrievals_ok),
218 		   atomic_read(&fscache_n_retrievals_wait),
219 		   atomic_read(&fscache_n_retrievals_nodata),
220 		   atomic_read(&fscache_n_retrievals_nobufs),
221 		   atomic_read(&fscache_n_retrievals_intr),
222 		   atomic_read(&fscache_n_retrievals_nomem));
223 	seq_printf(m, "Retrvls: ops=%u owt=%u abt=%u\n",
224 		   atomic_read(&fscache_n_retrieval_ops),
225 		   atomic_read(&fscache_n_retrieval_op_waits),
226 		   atomic_read(&fscache_n_retrievals_object_dead));
227 
228 	seq_printf(m, "Stores : n=%u ok=%u agn=%u nbf=%u oom=%u\n",
229 		   atomic_read(&fscache_n_stores),
230 		   atomic_read(&fscache_n_stores_ok),
231 		   atomic_read(&fscache_n_stores_again),
232 		   atomic_read(&fscache_n_stores_nobufs),
233 		   atomic_read(&fscache_n_stores_oom));
234 	seq_printf(m, "Stores : ops=%u run=%u pgs=%u rxd=%u olm=%u\n",
235 		   atomic_read(&fscache_n_store_ops),
236 		   atomic_read(&fscache_n_store_calls),
237 		   atomic_read(&fscache_n_store_pages),
238 		   atomic_read(&fscache_n_store_radix_deletes),
239 		   atomic_read(&fscache_n_store_pages_over_limit));
240 
241 	seq_printf(m, "VmScan : nos=%u gon=%u bsy=%u can=%u wt=%u\n",
242 		   atomic_read(&fscache_n_store_vmscan_not_storing),
243 		   atomic_read(&fscache_n_store_vmscan_gone),
244 		   atomic_read(&fscache_n_store_vmscan_busy),
245 		   atomic_read(&fscache_n_store_vmscan_cancelled),
246 		   atomic_read(&fscache_n_store_vmscan_wait));
247 
248 	seq_printf(m, "Ops    : pend=%u run=%u enq=%u can=%u rej=%u\n",
249 		   atomic_read(&fscache_n_op_pend),
250 		   atomic_read(&fscache_n_op_run),
251 		   atomic_read(&fscache_n_op_enqueue),
252 		   atomic_read(&fscache_n_op_cancelled),
253 		   atomic_read(&fscache_n_op_rejected));
254 	seq_printf(m, "Ops    : ini=%u dfr=%u rel=%u gc=%u\n",
255 		   atomic_read(&fscache_n_op_initialised),
256 		   atomic_read(&fscache_n_op_deferred_release),
257 		   atomic_read(&fscache_n_op_release),
258 		   atomic_read(&fscache_n_op_gc));
259 
260 	seq_printf(m, "CacheOp: alo=%d luo=%d luc=%d gro=%d\n",
261 		   atomic_read(&fscache_n_cop_alloc_object),
262 		   atomic_read(&fscache_n_cop_lookup_object),
263 		   atomic_read(&fscache_n_cop_lookup_complete),
264 		   atomic_read(&fscache_n_cop_grab_object));
265 	seq_printf(m, "CacheOp: inv=%d upo=%d dro=%d pto=%d atc=%d syn=%d\n",
266 		   atomic_read(&fscache_n_cop_invalidate_object),
267 		   atomic_read(&fscache_n_cop_update_object),
268 		   atomic_read(&fscache_n_cop_drop_object),
269 		   atomic_read(&fscache_n_cop_put_object),
270 		   atomic_read(&fscache_n_cop_attr_changed),
271 		   atomic_read(&fscache_n_cop_sync_cache));
272 	seq_printf(m, "CacheOp: rap=%d ras=%d alp=%d als=%d wrp=%d ucp=%d dsp=%d\n",
273 		   atomic_read(&fscache_n_cop_read_or_alloc_page),
274 		   atomic_read(&fscache_n_cop_read_or_alloc_pages),
275 		   atomic_read(&fscache_n_cop_allocate_page),
276 		   atomic_read(&fscache_n_cop_allocate_pages),
277 		   atomic_read(&fscache_n_cop_write_page),
278 		   atomic_read(&fscache_n_cop_uncache_page),
279 		   atomic_read(&fscache_n_cop_dissociate_pages));
280 	seq_printf(m, "CacheEv: nsp=%d stl=%d rtr=%d cul=%d\n",
281 		   atomic_read(&fscache_n_cache_no_space_reject),
282 		   atomic_read(&fscache_n_cache_stale_objects),
283 		   atomic_read(&fscache_n_cache_retired_objects),
284 		   atomic_read(&fscache_n_cache_culled_objects));
285 	return 0;
286 }
287