| /* 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_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_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; |
| |
| /* |
| * 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\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)); |
| |
| 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 : dfr=%u rel=%u gc=%u\n", |
| 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)); |
| 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 = { |
| .owner = THIS_MODULE, |
| .open = fscache_stats_open, |
| .read = seq_read, |
| .llseek = seq_lseek, |
| .release = seq_release, |
| }; |
