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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; | |
28 | ||
29 | atomic_t fscache_n_attr_changed; | |
30 | atomic_t fscache_n_attr_changed_ok; | |
31 | atomic_t fscache_n_attr_changed_nobufs; | |
32 | atomic_t fscache_n_attr_changed_nomem; | |
33 | atomic_t fscache_n_attr_changed_calls; | |
34 | ||
35 | atomic_t fscache_n_allocs; | |
36 | atomic_t fscache_n_allocs_ok; | |
37 | atomic_t fscache_n_allocs_wait; | |
38 | atomic_t fscache_n_allocs_nobufs; | |
39 | atomic_t fscache_n_alloc_ops; | |
40 | atomic_t fscache_n_alloc_op_waits; | |
41 | ||
42 | atomic_t fscache_n_retrievals; | |
43 | atomic_t fscache_n_retrievals_ok; | |
44 | atomic_t fscache_n_retrievals_wait; | |
45 | atomic_t fscache_n_retrievals_nodata; | |
46 | atomic_t fscache_n_retrievals_nobufs; | |
47 | atomic_t fscache_n_retrievals_intr; | |
48 | atomic_t fscache_n_retrievals_nomem; | |
49 | atomic_t fscache_n_retrieval_ops; | |
50 | atomic_t fscache_n_retrieval_op_waits; | |
51 | ||
52 | atomic_t fscache_n_stores; | |
53 | atomic_t fscache_n_stores_ok; | |
54 | atomic_t fscache_n_stores_again; | |
55 | atomic_t fscache_n_stores_nobufs; | |
56 | atomic_t fscache_n_stores_oom; | |
57 | atomic_t fscache_n_store_ops; | |
58 | atomic_t fscache_n_store_calls; | |
59 | ||
60 | atomic_t fscache_n_marks; | |
61 | atomic_t fscache_n_uncaches; | |
62 | ||
63 | atomic_t fscache_n_acquires; | |
64 | atomic_t fscache_n_acquires_null; | |
65 | atomic_t fscache_n_acquires_no_cache; | |
66 | atomic_t fscache_n_acquires_ok; | |
67 | atomic_t fscache_n_acquires_nobufs; | |
68 | atomic_t fscache_n_acquires_oom; | |
69 | ||
70 | atomic_t fscache_n_updates; | |
71 | atomic_t fscache_n_updates_null; | |
72 | atomic_t fscache_n_updates_run; | |
73 | ||
74 | atomic_t fscache_n_relinquishes; | |
75 | atomic_t fscache_n_relinquishes_null; | |
76 | atomic_t fscache_n_relinquishes_waitcrt; | |
77 | ||
78 | atomic_t fscache_n_cookie_index; | |
79 | atomic_t fscache_n_cookie_data; | |
80 | atomic_t fscache_n_cookie_special; | |
81 | ||
82 | atomic_t fscache_n_object_alloc; | |
83 | atomic_t fscache_n_object_no_alloc; | |
84 | atomic_t fscache_n_object_lookups; | |
85 | atomic_t fscache_n_object_lookups_negative; | |
86 | atomic_t fscache_n_object_lookups_positive; | |
87 | atomic_t fscache_n_object_created; | |
88 | atomic_t fscache_n_object_avail; | |
89 | atomic_t fscache_n_object_dead; | |
90 | ||
91 | atomic_t fscache_n_checkaux_none; | |
92 | atomic_t fscache_n_checkaux_okay; | |
93 | atomic_t fscache_n_checkaux_update; | |
94 | atomic_t fscache_n_checkaux_obsolete; | |
95 | ||
96 | /* | |
97 | * display the general statistics | |
98 | */ | |
99 | static int fscache_stats_show(struct seq_file *m, void *v) | |
100 | { | |
101 | seq_puts(m, "FS-Cache statistics\n"); | |
102 | ||
103 | seq_printf(m, "Cookies: idx=%u dat=%u spc=%u\n", | |
104 | atomic_read(&fscache_n_cookie_index), | |
105 | atomic_read(&fscache_n_cookie_data), | |
106 | atomic_read(&fscache_n_cookie_special)); | |
107 | ||
108 | seq_printf(m, "Objects: alc=%u nal=%u avl=%u ded=%u\n", | |
109 | atomic_read(&fscache_n_object_alloc), | |
110 | atomic_read(&fscache_n_object_no_alloc), | |
111 | atomic_read(&fscache_n_object_avail), | |
112 | atomic_read(&fscache_n_object_dead)); | |
113 | seq_printf(m, "ChkAux : non=%u ok=%u upd=%u obs=%u\n", | |
114 | atomic_read(&fscache_n_checkaux_none), | |
115 | atomic_read(&fscache_n_checkaux_okay), | |
116 | atomic_read(&fscache_n_checkaux_update), | |
117 | atomic_read(&fscache_n_checkaux_obsolete)); | |
118 | ||
119 | seq_printf(m, "Pages : mrk=%u unc=%u\n", | |
120 | atomic_read(&fscache_n_marks), | |
121 | atomic_read(&fscache_n_uncaches)); | |
122 | ||
123 | seq_printf(m, "Acquire: n=%u nul=%u noc=%u ok=%u nbf=%u" | |
124 | " oom=%u\n", | |
125 | atomic_read(&fscache_n_acquires), | |
126 | atomic_read(&fscache_n_acquires_null), | |
127 | atomic_read(&fscache_n_acquires_no_cache), | |
128 | atomic_read(&fscache_n_acquires_ok), | |
129 | atomic_read(&fscache_n_acquires_nobufs), | |
130 | atomic_read(&fscache_n_acquires_oom)); | |
131 | ||
132 | seq_printf(m, "Lookups: n=%u neg=%u pos=%u crt=%u\n", | |
133 | atomic_read(&fscache_n_object_lookups), | |
134 | atomic_read(&fscache_n_object_lookups_negative), | |
135 | atomic_read(&fscache_n_object_lookups_positive), | |
136 | atomic_read(&fscache_n_object_created)); | |
137 | ||
138 | seq_printf(m, "Updates: n=%u nul=%u run=%u\n", | |
139 | atomic_read(&fscache_n_updates), | |
140 | atomic_read(&fscache_n_updates_null), | |
141 | atomic_read(&fscache_n_updates_run)); | |
142 | ||
143 | seq_printf(m, "Relinqs: n=%u nul=%u wcr=%u\n", | |
144 | atomic_read(&fscache_n_relinquishes), | |
145 | atomic_read(&fscache_n_relinquishes_null), | |
146 | atomic_read(&fscache_n_relinquishes_waitcrt)); | |
147 | ||
148 | seq_printf(m, "AttrChg: n=%u ok=%u nbf=%u oom=%u run=%u\n", | |
149 | atomic_read(&fscache_n_attr_changed), | |
150 | atomic_read(&fscache_n_attr_changed_ok), | |
151 | atomic_read(&fscache_n_attr_changed_nobufs), | |
152 | atomic_read(&fscache_n_attr_changed_nomem), | |
153 | atomic_read(&fscache_n_attr_changed_calls)); | |
154 | ||
155 | seq_printf(m, "Allocs : n=%u ok=%u wt=%u nbf=%u\n", | |
156 | atomic_read(&fscache_n_allocs), | |
157 | atomic_read(&fscache_n_allocs_ok), | |
158 | atomic_read(&fscache_n_allocs_wait), | |
159 | atomic_read(&fscache_n_allocs_nobufs)); | |
160 | seq_printf(m, "Allocs : ops=%u owt=%u\n", | |
161 | atomic_read(&fscache_n_alloc_ops), | |
162 | atomic_read(&fscache_n_alloc_op_waits)); | |
163 | ||
164 | seq_printf(m, "Retrvls: n=%u ok=%u wt=%u nod=%u nbf=%u" | |
165 | " int=%u oom=%u\n", | |
166 | atomic_read(&fscache_n_retrievals), | |
167 | atomic_read(&fscache_n_retrievals_ok), | |
168 | atomic_read(&fscache_n_retrievals_wait), | |
169 | atomic_read(&fscache_n_retrievals_nodata), | |
170 | atomic_read(&fscache_n_retrievals_nobufs), | |
171 | atomic_read(&fscache_n_retrievals_intr), | |
172 | atomic_read(&fscache_n_retrievals_nomem)); | |
173 | seq_printf(m, "Retrvls: ops=%u owt=%u\n", | |
174 | atomic_read(&fscache_n_retrieval_ops), | |
175 | atomic_read(&fscache_n_retrieval_op_waits)); | |
176 | ||
177 | seq_printf(m, "Stores : n=%u ok=%u agn=%u nbf=%u oom=%u\n", | |
178 | atomic_read(&fscache_n_stores), | |
179 | atomic_read(&fscache_n_stores_ok), | |
180 | atomic_read(&fscache_n_stores_again), | |
181 | atomic_read(&fscache_n_stores_nobufs), | |
182 | atomic_read(&fscache_n_stores_oom)); | |
183 | seq_printf(m, "Stores : ops=%u run=%u\n", | |
184 | atomic_read(&fscache_n_store_ops), | |
185 | atomic_read(&fscache_n_store_calls)); | |
186 | ||
187 | seq_printf(m, "Ops : pend=%u run=%u enq=%u\n", | |
188 | atomic_read(&fscache_n_op_pend), | |
189 | atomic_read(&fscache_n_op_run), | |
190 | atomic_read(&fscache_n_op_enqueue)); | |
191 | seq_printf(m, "Ops : dfr=%u rel=%u gc=%u\n", | |
192 | atomic_read(&fscache_n_op_deferred_release), | |
193 | atomic_read(&fscache_n_op_release), | |
194 | atomic_read(&fscache_n_op_gc)); | |
195 | return 0; | |
196 | } | |
197 | ||
198 | /* | |
199 | * open "/proc/fs/fscache/stats" allowing provision of a statistical summary | |
200 | */ | |
201 | static int fscache_stats_open(struct inode *inode, struct file *file) | |
202 | { | |
203 | return single_open(file, fscache_stats_show, NULL); | |
204 | } | |
205 | ||
206 | const struct file_operations fscache_stats_fops = { | |
207 | .owner = THIS_MODULE, | |
208 | .open = fscache_stats_open, | |
209 | .read = seq_read, | |
210 | .llseek = seq_lseek, | |
211 | .release = seq_release, | |
212 | }; |