mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-25 05:34:00 +08:00
7394daa8c6
Make FS-Cache create its /proc interface and present various statistical information through it. Also provide the functions for updating this information. These features are enabled by: CONFIG_FSCACHE_PROC CONFIG_FSCACHE_STATS CONFIG_FSCACHE_HISTOGRAM The /proc directory for FS-Cache is also exported so that caching modules can add their own statistics there too. The FS-Cache module is loadable at this point, and the statistics files can be examined by userspace: cat /proc/fs/fscache/stats cat /proc/fs/fscache/histogram Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Steve Dickson <steved@redhat.com> Acked-by: Trond Myklebust <Trond.Myklebust@netapp.com> Acked-by: Al Viro <viro@zeniv.linux.org.uk> Tested-by: Daire Byrne <Daire.Byrne@framestore.com>
213 lines
6.7 KiB
C
213 lines
6.7 KiB
C
/* 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_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_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_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_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_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_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_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;
|
|
|
|
/*
|
|
* 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\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));
|
|
|
|
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\n",
|
|
atomic_read(&fscache_n_relinquishes),
|
|
atomic_read(&fscache_n_relinquishes_null),
|
|
atomic_read(&fscache_n_relinquishes_waitcrt));
|
|
|
|
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\n",
|
|
atomic_read(&fscache_n_allocs),
|
|
atomic_read(&fscache_n_allocs_ok),
|
|
atomic_read(&fscache_n_allocs_wait),
|
|
atomic_read(&fscache_n_allocs_nobufs));
|
|
seq_printf(m, "Allocs : ops=%u owt=%u\n",
|
|
atomic_read(&fscache_n_alloc_ops),
|
|
atomic_read(&fscache_n_alloc_op_waits));
|
|
|
|
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\n",
|
|
atomic_read(&fscache_n_retrieval_ops),
|
|
atomic_read(&fscache_n_retrieval_op_waits));
|
|
|
|
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\n",
|
|
atomic_read(&fscache_n_store_ops),
|
|
atomic_read(&fscache_n_store_calls));
|
|
|
|
seq_printf(m, "Ops : pend=%u run=%u enq=%u\n",
|
|
atomic_read(&fscache_n_op_pend),
|
|
atomic_read(&fscache_n_op_run),
|
|
atomic_read(&fscache_n_op_enqueue));
|
|
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));
|
|
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,
|
|
};
|