3 * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.com)
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.
12 #define FSCACHE_DEBUG_LEVEL THREAD
13 #include <linux/module.h>
14 #include <linux/proc_fs.h>
15 #include <linux/seq_file.h>
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 atomic_t fscache_n_op_cancelled
;
29 atomic_t fscache_n_op_rejected
;
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
;
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
;
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
;
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
;
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
;
73 atomic_t fscache_n_marks
;
74 atomic_t fscache_n_uncaches
;
76 atomic_t fscache_n_acquires
;
77 atomic_t fscache_n_acquires_null
;
78 atomic_t fscache_n_acquires_no_cache
;
79 atomic_t fscache_n_acquires_ok
;
80 atomic_t fscache_n_acquires_nobufs
;
81 atomic_t fscache_n_acquires_oom
;
83 atomic_t fscache_n_invalidates
;
84 atomic_t fscache_n_invalidates_run
;
86 atomic_t fscache_n_updates
;
87 atomic_t fscache_n_updates_null
;
88 atomic_t fscache_n_updates_run
;
90 atomic_t fscache_n_relinquishes
;
91 atomic_t fscache_n_relinquishes_null
;
92 atomic_t fscache_n_relinquishes_waitcrt
;
93 atomic_t fscache_n_relinquishes_retire
;
95 atomic_t fscache_n_cookie_index
;
96 atomic_t fscache_n_cookie_data
;
97 atomic_t fscache_n_cookie_special
;
99 atomic_t fscache_n_object_alloc
;
100 atomic_t fscache_n_object_no_alloc
;
101 atomic_t fscache_n_object_lookups
;
102 atomic_t fscache_n_object_lookups_negative
;
103 atomic_t fscache_n_object_lookups_positive
;
104 atomic_t fscache_n_object_lookups_timed_out
;
105 atomic_t fscache_n_object_created
;
106 atomic_t fscache_n_object_avail
;
107 atomic_t fscache_n_object_dead
;
109 atomic_t fscache_n_checkaux_none
;
110 atomic_t fscache_n_checkaux_okay
;
111 atomic_t fscache_n_checkaux_update
;
112 atomic_t fscache_n_checkaux_obsolete
;
114 atomic_t fscache_n_cop_alloc_object
;
115 atomic_t fscache_n_cop_lookup_object
;
116 atomic_t fscache_n_cop_lookup_complete
;
117 atomic_t fscache_n_cop_grab_object
;
118 atomic_t fscache_n_cop_invalidate_object
;
119 atomic_t fscache_n_cop_update_object
;
120 atomic_t fscache_n_cop_drop_object
;
121 atomic_t fscache_n_cop_put_object
;
122 atomic_t fscache_n_cop_sync_cache
;
123 atomic_t fscache_n_cop_attr_changed
;
124 atomic_t fscache_n_cop_read_or_alloc_page
;
125 atomic_t fscache_n_cop_read_or_alloc_pages
;
126 atomic_t fscache_n_cop_allocate_page
;
127 atomic_t fscache_n_cop_allocate_pages
;
128 atomic_t fscache_n_cop_write_page
;
129 atomic_t fscache_n_cop_uncache_page
;
130 atomic_t fscache_n_cop_dissociate_pages
;
133 * display the general statistics
135 static int fscache_stats_show(struct seq_file
*m
, void *v
)
137 seq_puts(m
, "FS-Cache statistics\n");
139 seq_printf(m
, "Cookies: idx=%u dat=%u spc=%u\n",
140 atomic_read(&fscache_n_cookie_index
),
141 atomic_read(&fscache_n_cookie_data
),
142 atomic_read(&fscache_n_cookie_special
));
144 seq_printf(m
, "Objects: alc=%u nal=%u avl=%u ded=%u\n",
145 atomic_read(&fscache_n_object_alloc
),
146 atomic_read(&fscache_n_object_no_alloc
),
147 atomic_read(&fscache_n_object_avail
),
148 atomic_read(&fscache_n_object_dead
));
149 seq_printf(m
, "ChkAux : non=%u ok=%u upd=%u obs=%u\n",
150 atomic_read(&fscache_n_checkaux_none
),
151 atomic_read(&fscache_n_checkaux_okay
),
152 atomic_read(&fscache_n_checkaux_update
),
153 atomic_read(&fscache_n_checkaux_obsolete
));
155 seq_printf(m
, "Pages : mrk=%u unc=%u\n",
156 atomic_read(&fscache_n_marks
),
157 atomic_read(&fscache_n_uncaches
));
159 seq_printf(m
, "Acquire: n=%u nul=%u noc=%u ok=%u nbf=%u"
161 atomic_read(&fscache_n_acquires
),
162 atomic_read(&fscache_n_acquires_null
),
163 atomic_read(&fscache_n_acquires_no_cache
),
164 atomic_read(&fscache_n_acquires_ok
),
165 atomic_read(&fscache_n_acquires_nobufs
),
166 atomic_read(&fscache_n_acquires_oom
));
168 seq_printf(m
, "Lookups: n=%u neg=%u pos=%u crt=%u tmo=%u\n",
169 atomic_read(&fscache_n_object_lookups
),
170 atomic_read(&fscache_n_object_lookups_negative
),
171 atomic_read(&fscache_n_object_lookups_positive
),
172 atomic_read(&fscache_n_object_created
),
173 atomic_read(&fscache_n_object_lookups_timed_out
));
175 seq_printf(m
, "Invals : n=%u run=%u\n",
176 atomic_read(&fscache_n_invalidates
),
177 atomic_read(&fscache_n_invalidates_run
));
179 seq_printf(m
, "Updates: n=%u nul=%u run=%u\n",
180 atomic_read(&fscache_n_updates
),
181 atomic_read(&fscache_n_updates_null
),
182 atomic_read(&fscache_n_updates_run
));
184 seq_printf(m
, "Relinqs: n=%u nul=%u wcr=%u rtr=%u\n",
185 atomic_read(&fscache_n_relinquishes
),
186 atomic_read(&fscache_n_relinquishes_null
),
187 atomic_read(&fscache_n_relinquishes_waitcrt
),
188 atomic_read(&fscache_n_relinquishes_retire
));
190 seq_printf(m
, "AttrChg: n=%u ok=%u nbf=%u oom=%u run=%u\n",
191 atomic_read(&fscache_n_attr_changed
),
192 atomic_read(&fscache_n_attr_changed_ok
),
193 atomic_read(&fscache_n_attr_changed_nobufs
),
194 atomic_read(&fscache_n_attr_changed_nomem
),
195 atomic_read(&fscache_n_attr_changed_calls
));
197 seq_printf(m
, "Allocs : n=%u ok=%u wt=%u nbf=%u int=%u\n",
198 atomic_read(&fscache_n_allocs
),
199 atomic_read(&fscache_n_allocs_ok
),
200 atomic_read(&fscache_n_allocs_wait
),
201 atomic_read(&fscache_n_allocs_nobufs
),
202 atomic_read(&fscache_n_allocs_intr
));
203 seq_printf(m
, "Allocs : ops=%u owt=%u abt=%u\n",
204 atomic_read(&fscache_n_alloc_ops
),
205 atomic_read(&fscache_n_alloc_op_waits
),
206 atomic_read(&fscache_n_allocs_object_dead
));
208 seq_printf(m
, "Retrvls: n=%u ok=%u wt=%u nod=%u nbf=%u"
210 atomic_read(&fscache_n_retrievals
),
211 atomic_read(&fscache_n_retrievals_ok
),
212 atomic_read(&fscache_n_retrievals_wait
),
213 atomic_read(&fscache_n_retrievals_nodata
),
214 atomic_read(&fscache_n_retrievals_nobufs
),
215 atomic_read(&fscache_n_retrievals_intr
),
216 atomic_read(&fscache_n_retrievals_nomem
));
217 seq_printf(m
, "Retrvls: ops=%u owt=%u abt=%u\n",
218 atomic_read(&fscache_n_retrieval_ops
),
219 atomic_read(&fscache_n_retrieval_op_waits
),
220 atomic_read(&fscache_n_retrievals_object_dead
));
222 seq_printf(m
, "Stores : n=%u ok=%u agn=%u nbf=%u oom=%u\n",
223 atomic_read(&fscache_n_stores
),
224 atomic_read(&fscache_n_stores_ok
),
225 atomic_read(&fscache_n_stores_again
),
226 atomic_read(&fscache_n_stores_nobufs
),
227 atomic_read(&fscache_n_stores_oom
));
228 seq_printf(m
, "Stores : ops=%u run=%u pgs=%u rxd=%u olm=%u\n",
229 atomic_read(&fscache_n_store_ops
),
230 atomic_read(&fscache_n_store_calls
),
231 atomic_read(&fscache_n_store_pages
),
232 atomic_read(&fscache_n_store_radix_deletes
),
233 atomic_read(&fscache_n_store_pages_over_limit
));
235 seq_printf(m
, "VmScan : nos=%u gon=%u bsy=%u can=%u\n",
236 atomic_read(&fscache_n_store_vmscan_not_storing
),
237 atomic_read(&fscache_n_store_vmscan_gone
),
238 atomic_read(&fscache_n_store_vmscan_busy
),
239 atomic_read(&fscache_n_store_vmscan_cancelled
));
241 seq_printf(m
, "Ops : pend=%u run=%u enq=%u can=%u rej=%u\n",
242 atomic_read(&fscache_n_op_pend
),
243 atomic_read(&fscache_n_op_run
),
244 atomic_read(&fscache_n_op_enqueue
),
245 atomic_read(&fscache_n_op_cancelled
),
246 atomic_read(&fscache_n_op_rejected
));
247 seq_printf(m
, "Ops : dfr=%u rel=%u gc=%u\n",
248 atomic_read(&fscache_n_op_deferred_release
),
249 atomic_read(&fscache_n_op_release
),
250 atomic_read(&fscache_n_op_gc
));
252 seq_printf(m
, "CacheOp: alo=%d luo=%d luc=%d gro=%d\n",
253 atomic_read(&fscache_n_cop_alloc_object
),
254 atomic_read(&fscache_n_cop_lookup_object
),
255 atomic_read(&fscache_n_cop_lookup_complete
),
256 atomic_read(&fscache_n_cop_grab_object
));
257 seq_printf(m
, "CacheOp: inv=%d upo=%d dro=%d pto=%d atc=%d syn=%d\n",
258 atomic_read(&fscache_n_cop_invalidate_object
),
259 atomic_read(&fscache_n_cop_update_object
),
260 atomic_read(&fscache_n_cop_drop_object
),
261 atomic_read(&fscache_n_cop_put_object
),
262 atomic_read(&fscache_n_cop_attr_changed
),
263 atomic_read(&fscache_n_cop_sync_cache
));
264 seq_printf(m
, "CacheOp: rap=%d ras=%d alp=%d als=%d wrp=%d ucp=%d dsp=%d\n",
265 atomic_read(&fscache_n_cop_read_or_alloc_page
),
266 atomic_read(&fscache_n_cop_read_or_alloc_pages
),
267 atomic_read(&fscache_n_cop_allocate_page
),
268 atomic_read(&fscache_n_cop_allocate_pages
),
269 atomic_read(&fscache_n_cop_write_page
),
270 atomic_read(&fscache_n_cop_uncache_page
),
271 atomic_read(&fscache_n_cop_dissociate_pages
));
276 * open "/proc/fs/fscache/stats" allowing provision of a statistical summary
278 static int fscache_stats_open(struct inode
*inode
, struct file
*file
)
280 return single_open(file
, fscache_stats_show
, NULL
);
283 const struct file_operations fscache_stats_fops
= {
284 .owner
= THIS_MODULE
,
285 .open
= fscache_stats_open
,
288 .release
= seq_release
,