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