David Howells | 7394daa | 2009-04-03 16:42:37 +0100 | [diff] [blame] | 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 | }; |