| /* FS-Cache statistics | |
| * | |
| * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. | |
| * Written by David Howells (dhowells@redhat.com) | |
| * | |
| * This program is free software; you can redistribute it and/or | |
| * modify it under the terms of the GNU General Public License | |
| * as published by the Free Software Foundation; either version | |
| * 2 of the License, or (at your option) any later version. | |
| */ | |
| #define FSCACHE_DEBUG_LEVEL THREAD | |
| #include <linux/module.h> | |
| #include <linux/proc_fs.h> | |
| #include <linux/seq_file.h> | |
| #include "internal.h" | |
| /* | |
| * operation counters | |
| */ | |
| atomic_t fscache_n_op_pend; | |
| atomic_t fscache_n_op_run; | |
| atomic_t fscache_n_op_enqueue; | |
| atomic_t fscache_n_op_requeue; | |
| atomic_t fscache_n_op_deferred_release; | |
| atomic_t fscache_n_op_initialised; | |
| atomic_t fscache_n_op_release; | |
| atomic_t fscache_n_op_gc; | |
| atomic_t fscache_n_op_cancelled; | |
| atomic_t fscache_n_op_rejected; | |
| atomic_t fscache_n_attr_changed; | |
| atomic_t fscache_n_attr_changed_ok; | |
| atomic_t fscache_n_attr_changed_nobufs; | |
| atomic_t fscache_n_attr_changed_nomem; | |
| atomic_t fscache_n_attr_changed_calls; | |
| atomic_t fscache_n_allocs; | |
| atomic_t fscache_n_allocs_ok; | |
| atomic_t fscache_n_allocs_wait; | |
| atomic_t fscache_n_allocs_nobufs; | |
| atomic_t fscache_n_allocs_intr; | |
| atomic_t fscache_n_allocs_object_dead; | |
| atomic_t fscache_n_alloc_ops; | |
| atomic_t fscache_n_alloc_op_waits; | |
| atomic_t fscache_n_retrievals; | |
| atomic_t fscache_n_retrievals_ok; | |
| atomic_t fscache_n_retrievals_wait; | |
| atomic_t fscache_n_retrievals_nodata; | |
| atomic_t fscache_n_retrievals_nobufs; | |
| atomic_t fscache_n_retrievals_intr; | |
| atomic_t fscache_n_retrievals_nomem; | |
| atomic_t fscache_n_retrievals_object_dead; | |
| atomic_t fscache_n_retrieval_ops; | |
| atomic_t fscache_n_retrieval_op_waits; | |
| atomic_t fscache_n_stores; | |
| atomic_t fscache_n_stores_ok; | |
| atomic_t fscache_n_stores_again; | |
| atomic_t fscache_n_stores_nobufs; | |
| atomic_t fscache_n_stores_oom; | |
| atomic_t fscache_n_store_ops; | |
| atomic_t fscache_n_store_calls; | |
| atomic_t fscache_n_store_pages; | |
| atomic_t fscache_n_store_radix_deletes; | |
| atomic_t fscache_n_store_pages_over_limit; | |
| atomic_t fscache_n_store_vmscan_not_storing; | |
| atomic_t fscache_n_store_vmscan_gone; | |
| atomic_t fscache_n_store_vmscan_busy; | |
| atomic_t fscache_n_store_vmscan_cancelled; | |
| atomic_t fscache_n_store_vmscan_wait; | |
| atomic_t fscache_n_marks; | |
| atomic_t fscache_n_uncaches; | |
| atomic_t fscache_n_acquires; | |
| atomic_t fscache_n_acquires_null; | |
| atomic_t fscache_n_acquires_no_cache; | |
| atomic_t fscache_n_acquires_ok; | |
| atomic_t fscache_n_acquires_nobufs; | |
| atomic_t fscache_n_acquires_oom; | |
| atomic_t fscache_n_invalidates; | |
| atomic_t fscache_n_invalidates_run; | |
| atomic_t fscache_n_updates; | |
| atomic_t fscache_n_updates_null; | |
| atomic_t fscache_n_updates_run; | |
| atomic_t fscache_n_relinquishes; | |
| atomic_t fscache_n_relinquishes_null; | |
| atomic_t fscache_n_relinquishes_waitcrt; | |
| atomic_t fscache_n_relinquishes_retire; | |
| atomic_t fscache_n_cookie_index; | |
| atomic_t fscache_n_cookie_data; | |
| atomic_t fscache_n_cookie_special; | |
| atomic_t fscache_n_object_alloc; | |
| atomic_t fscache_n_object_no_alloc; | |
| atomic_t fscache_n_object_lookups; | |
| atomic_t fscache_n_object_lookups_negative; | |
| atomic_t fscache_n_object_lookups_positive; | |
| atomic_t fscache_n_object_lookups_timed_out; | |
| atomic_t fscache_n_object_created; | |
| atomic_t fscache_n_object_avail; | |
| atomic_t fscache_n_object_dead; | |
| atomic_t fscache_n_checkaux_none; | |
| atomic_t fscache_n_checkaux_okay; | |
| atomic_t fscache_n_checkaux_update; | |
| atomic_t fscache_n_checkaux_obsolete; | |
| atomic_t fscache_n_cop_alloc_object; | |
| atomic_t fscache_n_cop_lookup_object; | |
| atomic_t fscache_n_cop_lookup_complete; | |
| atomic_t fscache_n_cop_grab_object; | |
| atomic_t fscache_n_cop_invalidate_object; | |
| atomic_t fscache_n_cop_update_object; | |
| atomic_t fscache_n_cop_drop_object; | |
| atomic_t fscache_n_cop_put_object; | |
| atomic_t fscache_n_cop_sync_cache; | |
| atomic_t fscache_n_cop_attr_changed; | |
| atomic_t fscache_n_cop_read_or_alloc_page; | |
| atomic_t fscache_n_cop_read_or_alloc_pages; | |
| atomic_t fscache_n_cop_allocate_page; | |
| atomic_t fscache_n_cop_allocate_pages; | |
| atomic_t fscache_n_cop_write_page; | |
| atomic_t fscache_n_cop_uncache_page; | |
| atomic_t fscache_n_cop_dissociate_pages; | |
| atomic_t fscache_n_cache_no_space_reject; | |
| atomic_t fscache_n_cache_stale_objects; | |
| atomic_t fscache_n_cache_retired_objects; | |
| atomic_t fscache_n_cache_culled_objects; | |
| /* | |
| * display the general statistics | |
| */ | |
| static int fscache_stats_show(struct seq_file *m, void *v) | |
| { | |
| seq_puts(m, "FS-Cache statistics\n"); | |
| seq_printf(m, "Cookies: idx=%u dat=%u spc=%u\n", | |
| atomic_read(&fscache_n_cookie_index), | |
| atomic_read(&fscache_n_cookie_data), | |
| atomic_read(&fscache_n_cookie_special)); | |
| seq_printf(m, "Objects: alc=%u nal=%u avl=%u ded=%u\n", | |
| atomic_read(&fscache_n_object_alloc), | |
| atomic_read(&fscache_n_object_no_alloc), | |
| atomic_read(&fscache_n_object_avail), | |
| atomic_read(&fscache_n_object_dead)); | |
| seq_printf(m, "ChkAux : non=%u ok=%u upd=%u obs=%u\n", | |
| atomic_read(&fscache_n_checkaux_none), | |
| atomic_read(&fscache_n_checkaux_okay), | |
| atomic_read(&fscache_n_checkaux_update), | |
| atomic_read(&fscache_n_checkaux_obsolete)); | |
| seq_printf(m, "Pages : mrk=%u unc=%u\n", | |
| atomic_read(&fscache_n_marks), | |
| atomic_read(&fscache_n_uncaches)); | |
| seq_printf(m, "Acquire: n=%u nul=%u noc=%u ok=%u nbf=%u" | |
| " oom=%u\n", | |
| atomic_read(&fscache_n_acquires), | |
| atomic_read(&fscache_n_acquires_null), | |
| atomic_read(&fscache_n_acquires_no_cache), | |
| atomic_read(&fscache_n_acquires_ok), | |
| atomic_read(&fscache_n_acquires_nobufs), | |
| atomic_read(&fscache_n_acquires_oom)); | |
| seq_printf(m, "Lookups: n=%u neg=%u pos=%u crt=%u tmo=%u\n", | |
| atomic_read(&fscache_n_object_lookups), | |
| atomic_read(&fscache_n_object_lookups_negative), | |
| atomic_read(&fscache_n_object_lookups_positive), | |
| atomic_read(&fscache_n_object_created), | |
| atomic_read(&fscache_n_object_lookups_timed_out)); | |
| seq_printf(m, "Invals : n=%u run=%u\n", | |
| atomic_read(&fscache_n_invalidates), | |
| atomic_read(&fscache_n_invalidates_run)); | |
| seq_printf(m, "Updates: n=%u nul=%u run=%u\n", | |
| atomic_read(&fscache_n_updates), | |
| atomic_read(&fscache_n_updates_null), | |
| atomic_read(&fscache_n_updates_run)); | |
| seq_printf(m, "Relinqs: n=%u nul=%u wcr=%u rtr=%u\n", | |
| atomic_read(&fscache_n_relinquishes), | |
| atomic_read(&fscache_n_relinquishes_null), | |
| atomic_read(&fscache_n_relinquishes_waitcrt), | |
| atomic_read(&fscache_n_relinquishes_retire)); | |
| seq_printf(m, "AttrChg: n=%u ok=%u nbf=%u oom=%u run=%u\n", | |
| atomic_read(&fscache_n_attr_changed), | |
| atomic_read(&fscache_n_attr_changed_ok), | |
| atomic_read(&fscache_n_attr_changed_nobufs), | |
| atomic_read(&fscache_n_attr_changed_nomem), | |
| atomic_read(&fscache_n_attr_changed_calls)); | |
| seq_printf(m, "Allocs : n=%u ok=%u wt=%u nbf=%u int=%u\n", | |
| atomic_read(&fscache_n_allocs), | |
| atomic_read(&fscache_n_allocs_ok), | |
| atomic_read(&fscache_n_allocs_wait), | |
| atomic_read(&fscache_n_allocs_nobufs), | |
| atomic_read(&fscache_n_allocs_intr)); | |
| seq_printf(m, "Allocs : ops=%u owt=%u abt=%u\n", | |
| atomic_read(&fscache_n_alloc_ops), | |
| atomic_read(&fscache_n_alloc_op_waits), | |
| atomic_read(&fscache_n_allocs_object_dead)); | |
| seq_printf(m, "Retrvls: n=%u ok=%u wt=%u nod=%u nbf=%u" | |
| " int=%u oom=%u\n", | |
| atomic_read(&fscache_n_retrievals), | |
| atomic_read(&fscache_n_retrievals_ok), | |
| atomic_read(&fscache_n_retrievals_wait), | |
| atomic_read(&fscache_n_retrievals_nodata), | |
| atomic_read(&fscache_n_retrievals_nobufs), | |
| atomic_read(&fscache_n_retrievals_intr), | |
| atomic_read(&fscache_n_retrievals_nomem)); | |
| seq_printf(m, "Retrvls: ops=%u owt=%u abt=%u\n", | |
| atomic_read(&fscache_n_retrieval_ops), | |
| atomic_read(&fscache_n_retrieval_op_waits), | |
| atomic_read(&fscache_n_retrievals_object_dead)); | |
| seq_printf(m, "Stores : n=%u ok=%u agn=%u nbf=%u oom=%u\n", | |
| atomic_read(&fscache_n_stores), | |
| atomic_read(&fscache_n_stores_ok), | |
| atomic_read(&fscache_n_stores_again), | |
| atomic_read(&fscache_n_stores_nobufs), | |
| atomic_read(&fscache_n_stores_oom)); | |
| seq_printf(m, "Stores : ops=%u run=%u pgs=%u rxd=%u olm=%u\n", | |
| atomic_read(&fscache_n_store_ops), | |
| atomic_read(&fscache_n_store_calls), | |
| atomic_read(&fscache_n_store_pages), | |
| atomic_read(&fscache_n_store_radix_deletes), | |
| atomic_read(&fscache_n_store_pages_over_limit)); | |
| seq_printf(m, "VmScan : nos=%u gon=%u bsy=%u can=%u wt=%u\n", | |
| atomic_read(&fscache_n_store_vmscan_not_storing), | |
| atomic_read(&fscache_n_store_vmscan_gone), | |
| atomic_read(&fscache_n_store_vmscan_busy), | |
| atomic_read(&fscache_n_store_vmscan_cancelled), | |
| atomic_read(&fscache_n_store_vmscan_wait)); | |
| seq_printf(m, "Ops : pend=%u run=%u enq=%u can=%u rej=%u\n", | |
| atomic_read(&fscache_n_op_pend), | |
| atomic_read(&fscache_n_op_run), | |
| atomic_read(&fscache_n_op_enqueue), | |
| atomic_read(&fscache_n_op_cancelled), | |
| atomic_read(&fscache_n_op_rejected)); | |
| seq_printf(m, "Ops : ini=%u dfr=%u rel=%u gc=%u\n", | |
| atomic_read(&fscache_n_op_initialised), | |
| atomic_read(&fscache_n_op_deferred_release), | |
| atomic_read(&fscache_n_op_release), | |
| atomic_read(&fscache_n_op_gc)); | |
| seq_printf(m, "CacheOp: alo=%d luo=%d luc=%d gro=%d\n", | |
| atomic_read(&fscache_n_cop_alloc_object), | |
| atomic_read(&fscache_n_cop_lookup_object), | |
| atomic_read(&fscache_n_cop_lookup_complete), | |
| atomic_read(&fscache_n_cop_grab_object)); | |
| seq_printf(m, "CacheOp: inv=%d upo=%d dro=%d pto=%d atc=%d syn=%d\n", | |
| atomic_read(&fscache_n_cop_invalidate_object), | |
| atomic_read(&fscache_n_cop_update_object), | |
| atomic_read(&fscache_n_cop_drop_object), | |
| atomic_read(&fscache_n_cop_put_object), | |
| atomic_read(&fscache_n_cop_attr_changed), | |
| atomic_read(&fscache_n_cop_sync_cache)); | |
| seq_printf(m, "CacheOp: rap=%d ras=%d alp=%d als=%d wrp=%d ucp=%d dsp=%d\n", | |
| atomic_read(&fscache_n_cop_read_or_alloc_page), | |
| atomic_read(&fscache_n_cop_read_or_alloc_pages), | |
| atomic_read(&fscache_n_cop_allocate_page), | |
| atomic_read(&fscache_n_cop_allocate_pages), | |
| atomic_read(&fscache_n_cop_write_page), | |
| atomic_read(&fscache_n_cop_uncache_page), | |
| atomic_read(&fscache_n_cop_dissociate_pages)); | |
| seq_printf(m, "CacheEv: nsp=%d stl=%d rtr=%d cul=%d\n", | |
| atomic_read(&fscache_n_cache_no_space_reject), | |
| atomic_read(&fscache_n_cache_stale_objects), | |
| atomic_read(&fscache_n_cache_retired_objects), | |
| atomic_read(&fscache_n_cache_culled_objects)); | |
| return 0; | |
| } | |
| /* | |
| * open "/proc/fs/fscache/stats" allowing provision of a statistical summary | |
| */ | |
| static int fscache_stats_open(struct inode *inode, struct file *file) | |
| { | |
| return single_open(file, fscache_stats_show, NULL); | |
| } | |
| const struct file_operations fscache_stats_fops = { | |
| .open = fscache_stats_open, | |
| .read = seq_read, | |
| .llseek = seq_lseek, | |
| .release = single_release, | |
| }; |