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fs/fscache/stats.c
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/* 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; |
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atomic_t fscache_n_op_initialised; |
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atomic_t fscache_n_op_release; atomic_t fscache_n_op_gc; |
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atomic_t fscache_n_op_cancelled; |
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atomic_t fscache_n_op_rejected; |
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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; |
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atomic_t fscache_n_allocs_intr; |
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atomic_t fscache_n_allocs_object_dead; |
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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; |
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atomic_t fscache_n_retrievals_object_dead; |
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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; |
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atomic_t fscache_n_store_pages; atomic_t fscache_n_store_radix_deletes; atomic_t fscache_n_store_pages_over_limit; |
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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; |
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atomic_t fscache_n_store_vmscan_wait; |
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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; |
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atomic_t fscache_n_invalidates; atomic_t fscache_n_invalidates_run; |
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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; |
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atomic_t fscache_n_relinquishes_retire; |
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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; |
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atomic_t fscache_n_object_lookups_timed_out; |
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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; |
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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; |
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atomic_t fscache_n_cop_invalidate_object; |
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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; |
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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; |
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/* * display the general statistics */ static int fscache_stats_show(struct seq_file *m, void *v) { seq_puts(m, "FS-Cache statistics "); seq_printf(m, "Cookies: idx=%u dat=%u spc=%u ", 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 ", 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 ", 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 ", 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 ", 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)); |
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seq_printf(m, "Lookups: n=%u neg=%u pos=%u crt=%u tmo=%u ", |
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atomic_read(&fscache_n_object_lookups), atomic_read(&fscache_n_object_lookups_negative), atomic_read(&fscache_n_object_lookups_positive), |
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atomic_read(&fscache_n_object_created), atomic_read(&fscache_n_object_lookups_timed_out)); |
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seq_printf(m, "Invals : n=%u run=%u ", atomic_read(&fscache_n_invalidates), atomic_read(&fscache_n_invalidates_run)); |
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seq_printf(m, "Updates: n=%u nul=%u run=%u ", atomic_read(&fscache_n_updates), atomic_read(&fscache_n_updates_null), atomic_read(&fscache_n_updates_run)); |
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seq_printf(m, "Relinqs: n=%u nul=%u wcr=%u rtr=%u ", |
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atomic_read(&fscache_n_relinquishes), atomic_read(&fscache_n_relinquishes_null), |
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atomic_read(&fscache_n_relinquishes_waitcrt), atomic_read(&fscache_n_relinquishes_retire)); |
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seq_printf(m, "AttrChg: n=%u ok=%u nbf=%u oom=%u run=%u ", 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)); |
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seq_printf(m, "Allocs : n=%u ok=%u wt=%u nbf=%u int=%u ", |
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atomic_read(&fscache_n_allocs), atomic_read(&fscache_n_allocs_ok), atomic_read(&fscache_n_allocs_wait), |
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atomic_read(&fscache_n_allocs_nobufs), atomic_read(&fscache_n_allocs_intr)); |
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seq_printf(m, "Allocs : ops=%u owt=%u abt=%u ", |
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atomic_read(&fscache_n_alloc_ops), |
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atomic_read(&fscache_n_alloc_op_waits), atomic_read(&fscache_n_allocs_object_dead)); |
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seq_printf(m, "Retrvls: n=%u ok=%u wt=%u nod=%u nbf=%u" " int=%u oom=%u ", 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)); |
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seq_printf(m, "Retrvls: ops=%u owt=%u abt=%u ", |
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atomic_read(&fscache_n_retrieval_ops), |
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atomic_read(&fscache_n_retrieval_op_waits), atomic_read(&fscache_n_retrievals_object_dead)); |
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seq_printf(m, "Stores : n=%u ok=%u agn=%u nbf=%u oom=%u ", 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)); |
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seq_printf(m, "Stores : ops=%u run=%u pgs=%u rxd=%u olm=%u ", |
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atomic_read(&fscache_n_store_ops), |
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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)); |
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seq_printf(m, "VmScan : nos=%u gon=%u bsy=%u can=%u wt=%u ", |
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atomic_read(&fscache_n_store_vmscan_not_storing), atomic_read(&fscache_n_store_vmscan_gone), atomic_read(&fscache_n_store_vmscan_busy), |
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atomic_read(&fscache_n_store_vmscan_cancelled), atomic_read(&fscache_n_store_vmscan_wait)); |
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seq_printf(m, "Ops : pend=%u run=%u enq=%u can=%u rej=%u ", |
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atomic_read(&fscache_n_op_pend), atomic_read(&fscache_n_op_run), |
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atomic_read(&fscache_n_op_enqueue), |
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atomic_read(&fscache_n_op_cancelled), atomic_read(&fscache_n_op_rejected)); |
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seq_printf(m, "Ops : ini=%u dfr=%u rel=%u gc=%u ", atomic_read(&fscache_n_op_initialised), |
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atomic_read(&fscache_n_op_deferred_release), atomic_read(&fscache_n_op_release), atomic_read(&fscache_n_op_gc)); |
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seq_printf(m, "CacheOp: alo=%d luo=%d luc=%d gro=%d ", 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)); |
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seq_printf(m, "CacheOp: inv=%d upo=%d dro=%d pto=%d atc=%d syn=%d ", atomic_read(&fscache_n_cop_invalidate_object), |
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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 ", 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)); |
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seq_printf(m, "CacheEv: nsp=%d stl=%d rtr=%d cul=%d ", 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)); |
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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, |
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.release = single_release, |
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}; |