2 * f2fs debugging statistics
4 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
5 * http://www.samsung.com/
6 * Copyright (c) 2012 Linux Foundation
7 * Copyright (c) 2012 Greg Kroah-Hartman <gregkh@linuxfoundation.org>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
15 #include <linux/backing-dev.h>
16 #include <linux/f2fs_fs.h>
17 #include <linux/blkdev.h>
18 #include <linux/debugfs.h>
19 #include <linux/seq_file.h>
26 static LIST_HEAD(f2fs_stat_list
);
27 static struct dentry
*f2fs_debugfs_root
;
28 static DEFINE_MUTEX(f2fs_stat_mutex
);
30 static void update_general_status(struct f2fs_sb_info
*sbi
)
32 struct f2fs_stat_info
*si
= F2FS_STAT(sbi
);
35 /* validation check of the segment numbers */
36 si
->hit_largest
= atomic64_read(&sbi
->read_hit_largest
);
37 si
->hit_cached
= atomic64_read(&sbi
->read_hit_cached
);
38 si
->hit_rbtree
= atomic64_read(&sbi
->read_hit_rbtree
);
39 si
->hit_total
= si
->hit_largest
+ si
->hit_cached
+ si
->hit_rbtree
;
40 si
->total_ext
= atomic64_read(&sbi
->total_hit_ext
);
41 si
->ext_tree
= atomic_read(&sbi
->total_ext_tree
);
42 si
->zombie_tree
= atomic_read(&sbi
->total_zombie_tree
);
43 si
->ext_node
= atomic_read(&sbi
->total_ext_node
);
44 si
->ndirty_node
= get_pages(sbi
, F2FS_DIRTY_NODES
);
45 si
->ndirty_dent
= get_pages(sbi
, F2FS_DIRTY_DENTS
);
46 si
->ndirty_meta
= get_pages(sbi
, F2FS_DIRTY_META
);
47 si
->ndirty_data
= get_pages(sbi
, F2FS_DIRTY_DATA
);
48 si
->ndirty_dirs
= sbi
->ndirty_inode
[DIR_INODE
];
49 si
->ndirty_files
= sbi
->ndirty_inode
[FILE_INODE
];
50 si
->ndirty_all
= sbi
->ndirty_inode
[DIRTY_META
];
51 si
->inmem_pages
= get_pages(sbi
, F2FS_INMEM_PAGES
);
52 si
->wb_bios
= atomic_read(&sbi
->nr_wb_bios
);
53 si
->total_count
= (int)sbi
->user_block_count
/ sbi
->blocks_per_seg
;
54 si
->rsvd_segs
= reserved_segments(sbi
);
55 si
->overp_segs
= overprovision_segments(sbi
);
56 si
->valid_count
= valid_user_blocks(sbi
);
57 si
->discard_blks
= discard_blocks(sbi
);
58 si
->valid_node_count
= valid_node_count(sbi
);
59 si
->valid_inode_count
= valid_inode_count(sbi
);
60 si
->inline_xattr
= atomic_read(&sbi
->inline_xattr
);
61 si
->inline_inode
= atomic_read(&sbi
->inline_inode
);
62 si
->inline_dir
= atomic_read(&sbi
->inline_dir
);
63 si
->orphans
= sbi
->im
[ORPHAN_INO
].ino_num
;
64 si
->utilization
= utilization(sbi
);
66 si
->free_segs
= free_segments(sbi
);
67 si
->free_secs
= free_sections(sbi
);
68 si
->prefree_count
= prefree_segments(sbi
);
69 si
->dirty_count
= dirty_segments(sbi
);
70 si
->node_pages
= NODE_MAPPING(sbi
)->nrpages
;
71 si
->meta_pages
= META_MAPPING(sbi
)->nrpages
;
72 si
->nats
= NM_I(sbi
)->nat_cnt
;
73 si
->dirty_nats
= NM_I(sbi
)->dirty_nat_cnt
;
74 si
->sits
= MAIN_SEGS(sbi
);
75 si
->dirty_sits
= SIT_I(sbi
)->dirty_sentries
;
76 si
->fnids
= NM_I(sbi
)->fcnt
;
77 si
->bg_gc
= sbi
->bg_gc
;
78 si
->util_free
= (int)(free_user_blocks(sbi
) >> sbi
->log_blocks_per_seg
)
79 * 100 / (int)(sbi
->user_block_count
>> sbi
->log_blocks_per_seg
)
81 si
->util_valid
= (int)(written_block_count(sbi
) >>
82 sbi
->log_blocks_per_seg
)
83 * 100 / (int)(sbi
->user_block_count
>> sbi
->log_blocks_per_seg
)
85 si
->util_invalid
= 50 - si
->util_free
- si
->util_valid
;
86 for (i
= CURSEG_HOT_DATA
; i
<= CURSEG_COLD_NODE
; i
++) {
87 struct curseg_info
*curseg
= CURSEG_I(sbi
, i
);
88 si
->curseg
[i
] = curseg
->segno
;
89 si
->cursec
[i
] = curseg
->segno
/ sbi
->segs_per_sec
;
90 si
->curzone
[i
] = si
->cursec
[i
] / sbi
->secs_per_zone
;
93 for (i
= 0; i
< 2; i
++) {
94 si
->segment_count
[i
] = sbi
->segment_count
[i
];
95 si
->block_count
[i
] = sbi
->block_count
[i
];
98 si
->inplace_count
= atomic_read(&sbi
->inplace_count
);
102 * This function calculates BDF of every segments
104 static void update_sit_info(struct f2fs_sb_info
*sbi
)
106 struct f2fs_stat_info
*si
= F2FS_STAT(sbi
);
107 unsigned long long blks_per_sec
, hblks_per_sec
, total_vblocks
;
108 unsigned long long bimodal
, dist
;
109 unsigned int segno
, vblocks
;
114 blks_per_sec
= sbi
->segs_per_sec
* sbi
->blocks_per_seg
;
115 hblks_per_sec
= blks_per_sec
/ 2;
116 for (segno
= 0; segno
< MAIN_SEGS(sbi
); segno
+= sbi
->segs_per_sec
) {
117 vblocks
= get_valid_blocks(sbi
, segno
, sbi
->segs_per_sec
);
118 dist
= abs(vblocks
- hblks_per_sec
);
119 bimodal
+= dist
* dist
;
121 if (vblocks
> 0 && vblocks
< blks_per_sec
) {
122 total_vblocks
+= vblocks
;
126 dist
= div_u64(MAIN_SECS(sbi
) * hblks_per_sec
* hblks_per_sec
, 100);
127 si
->bimodal
= div64_u64(bimodal
, dist
);
129 si
->avg_vblocks
= div_u64(total_vblocks
, ndirty
);
135 * This function calculates memory footprint.
137 static void update_mem_info(struct f2fs_sb_info
*sbi
)
139 struct f2fs_stat_info
*si
= F2FS_STAT(sbi
);
146 si
->base_mem
= sizeof(struct f2fs_sb_info
) + sbi
->sb
->s_blocksize
;
147 si
->base_mem
+= 2 * sizeof(struct f2fs_inode_info
);
148 si
->base_mem
+= sizeof(*sbi
->ckpt
);
149 si
->base_mem
+= sizeof(struct percpu_counter
) * NR_COUNT_TYPE
;
152 si
->base_mem
+= sizeof(struct f2fs_sm_info
);
155 si
->base_mem
+= sizeof(struct sit_info
);
156 si
->base_mem
+= MAIN_SEGS(sbi
) * sizeof(struct seg_entry
);
157 si
->base_mem
+= f2fs_bitmap_size(MAIN_SEGS(sbi
));
158 si
->base_mem
+= 2 * SIT_VBLOCK_MAP_SIZE
* MAIN_SEGS(sbi
);
159 if (f2fs_discard_en(sbi
))
160 si
->base_mem
+= SIT_VBLOCK_MAP_SIZE
* MAIN_SEGS(sbi
);
161 si
->base_mem
+= SIT_VBLOCK_MAP_SIZE
;
162 if (sbi
->segs_per_sec
> 1)
163 si
->base_mem
+= MAIN_SECS(sbi
) * sizeof(struct sec_entry
);
164 si
->base_mem
+= __bitmap_size(sbi
, SIT_BITMAP
);
166 /* build free segmap */
167 si
->base_mem
+= sizeof(struct free_segmap_info
);
168 si
->base_mem
+= f2fs_bitmap_size(MAIN_SEGS(sbi
));
169 si
->base_mem
+= f2fs_bitmap_size(MAIN_SECS(sbi
));
172 si
->base_mem
+= sizeof(struct curseg_info
) * NR_CURSEG_TYPE
;
173 si
->base_mem
+= PAGE_SIZE
* NR_CURSEG_TYPE
;
175 /* build dirty segmap */
176 si
->base_mem
+= sizeof(struct dirty_seglist_info
);
177 si
->base_mem
+= NR_DIRTY_TYPE
* f2fs_bitmap_size(MAIN_SEGS(sbi
));
178 si
->base_mem
+= f2fs_bitmap_size(MAIN_SECS(sbi
));
181 si
->base_mem
+= sizeof(struct f2fs_nm_info
);
182 si
->base_mem
+= __bitmap_size(sbi
, NAT_BITMAP
);
189 si
->cache_mem
+= sizeof(struct f2fs_gc_kthread
);
191 /* build merge flush thread */
192 if (SM_I(sbi
)->cmd_control_info
)
193 si
->cache_mem
+= sizeof(struct flush_cmd_control
);
196 si
->cache_mem
+= NM_I(sbi
)->fcnt
* sizeof(struct free_nid
);
197 si
->cache_mem
+= NM_I(sbi
)->nat_cnt
* sizeof(struct nat_entry
);
198 si
->cache_mem
+= NM_I(sbi
)->dirty_nat_cnt
*
199 sizeof(struct nat_entry_set
);
200 si
->cache_mem
+= si
->inmem_pages
* sizeof(struct inmem_pages
);
201 for (i
= 0; i
<= ORPHAN_INO
; i
++)
202 si
->cache_mem
+= sbi
->im
[i
].ino_num
* sizeof(struct ino_entry
);
203 si
->cache_mem
+= atomic_read(&sbi
->total_ext_tree
) *
204 sizeof(struct extent_tree
);
205 si
->cache_mem
+= atomic_read(&sbi
->total_ext_node
) *
206 sizeof(struct extent_node
);
209 npages
= NODE_MAPPING(sbi
)->nrpages
;
210 si
->page_mem
+= (unsigned long long)npages
<< PAGE_SHIFT
;
211 npages
= META_MAPPING(sbi
)->nrpages
;
212 si
->page_mem
+= (unsigned long long)npages
<< PAGE_SHIFT
;
215 static int stat_show(struct seq_file
*s
, void *v
)
217 struct f2fs_stat_info
*si
;
221 mutex_lock(&f2fs_stat_mutex
);
222 list_for_each_entry(si
, &f2fs_stat_list
, stat_list
) {
223 update_general_status(si
->sbi
);
225 seq_printf(s
, "\n=====[ partition info(%pg). #%d, %s]=====\n",
226 si
->sbi
->sb
->s_bdev
, i
++,
227 f2fs_readonly(si
->sbi
->sb
) ? "RO": "RW");
228 seq_printf(s
, "[SB: 1] [CP: 2] [SIT: %d] [NAT: %d] ",
229 si
->sit_area_segs
, si
->nat_area_segs
);
230 seq_printf(s
, "[SSA: %d] [MAIN: %d",
231 si
->ssa_area_segs
, si
->main_area_segs
);
232 seq_printf(s
, "(OverProv:%d Resv:%d)]\n\n",
233 si
->overp_segs
, si
->rsvd_segs
);
234 if (test_opt(si
->sbi
, DISCARD
))
235 seq_printf(s
, "Utilization: %u%% (%u valid blocks, %u discard blocks)\n",
236 si
->utilization
, si
->valid_count
, si
->discard_blks
);
238 seq_printf(s
, "Utilization: %u%% (%u valid blocks)\n",
239 si
->utilization
, si
->valid_count
);
241 seq_printf(s
, " - Node: %u (Inode: %u, ",
242 si
->valid_node_count
, si
->valid_inode_count
);
243 seq_printf(s
, "Other: %u)\n - Data: %u\n",
244 si
->valid_node_count
- si
->valid_inode_count
,
245 si
->valid_count
- si
->valid_node_count
);
246 seq_printf(s
, " - Inline_xattr Inode: %u\n",
248 seq_printf(s
, " - Inline_data Inode: %u\n",
250 seq_printf(s
, " - Inline_dentry Inode: %u\n",
252 seq_printf(s
, " - Orphan Inode: %u\n",
254 seq_printf(s
, "\nMain area: %d segs, %d secs %d zones\n",
255 si
->main_area_segs
, si
->main_area_sections
,
256 si
->main_area_zones
);
257 seq_printf(s
, " - COLD data: %d, %d, %d\n",
258 si
->curseg
[CURSEG_COLD_DATA
],
259 si
->cursec
[CURSEG_COLD_DATA
],
260 si
->curzone
[CURSEG_COLD_DATA
]);
261 seq_printf(s
, " - WARM data: %d, %d, %d\n",
262 si
->curseg
[CURSEG_WARM_DATA
],
263 si
->cursec
[CURSEG_WARM_DATA
],
264 si
->curzone
[CURSEG_WARM_DATA
]);
265 seq_printf(s
, " - HOT data: %d, %d, %d\n",
266 si
->curseg
[CURSEG_HOT_DATA
],
267 si
->cursec
[CURSEG_HOT_DATA
],
268 si
->curzone
[CURSEG_HOT_DATA
]);
269 seq_printf(s
, " - Dir dnode: %d, %d, %d\n",
270 si
->curseg
[CURSEG_HOT_NODE
],
271 si
->cursec
[CURSEG_HOT_NODE
],
272 si
->curzone
[CURSEG_HOT_NODE
]);
273 seq_printf(s
, " - File dnode: %d, %d, %d\n",
274 si
->curseg
[CURSEG_WARM_NODE
],
275 si
->cursec
[CURSEG_WARM_NODE
],
276 si
->curzone
[CURSEG_WARM_NODE
]);
277 seq_printf(s
, " - Indir nodes: %d, %d, %d\n",
278 si
->curseg
[CURSEG_COLD_NODE
],
279 si
->cursec
[CURSEG_COLD_NODE
],
280 si
->curzone
[CURSEG_COLD_NODE
]);
281 seq_printf(s
, "\n - Valid: %d\n - Dirty: %d\n",
282 si
->main_area_segs
- si
->dirty_count
-
283 si
->prefree_count
- si
->free_segs
,
285 seq_printf(s
, " - Prefree: %d\n - Free: %d (%d)\n\n",
286 si
->prefree_count
, si
->free_segs
, si
->free_secs
);
287 seq_printf(s
, "CP calls: %d (BG: %d)\n",
288 si
->cp_count
, si
->bg_cp_count
);
289 seq_printf(s
, "GC calls: %d (BG: %d)\n",
290 si
->call_count
, si
->bg_gc
);
291 seq_printf(s
, " - data segments : %d (%d)\n",
292 si
->data_segs
, si
->bg_data_segs
);
293 seq_printf(s
, " - node segments : %d (%d)\n",
294 si
->node_segs
, si
->bg_node_segs
);
295 seq_printf(s
, "Try to move %d blocks (BG: %d)\n", si
->tot_blks
,
296 si
->bg_data_blks
+ si
->bg_node_blks
);
297 seq_printf(s
, " - data blocks : %d (%d)\n", si
->data_blks
,
299 seq_printf(s
, " - node blocks : %d (%d)\n", si
->node_blks
,
301 seq_puts(s
, "\nExtent Cache:\n");
302 seq_printf(s
, " - Hit Count: L1-1:%llu L1-2:%llu L2:%llu\n",
303 si
->hit_largest
, si
->hit_cached
,
305 seq_printf(s
, " - Hit Ratio: %llu%% (%llu / %llu)\n",
307 div64_u64(si
->hit_total
* 100, si
->total_ext
),
308 si
->hit_total
, si
->total_ext
);
309 seq_printf(s
, " - Inner Struct Count: tree: %d(%d), node: %d\n",
310 si
->ext_tree
, si
->zombie_tree
, si
->ext_node
);
311 seq_puts(s
, "\nBalancing F2FS Async:\n");
312 seq_printf(s
, " - inmem: %4lld, wb_bios: %4d\n",
313 si
->inmem_pages
, si
->wb_bios
);
314 seq_printf(s
, " - nodes: %4lld in %4d\n",
315 si
->ndirty_node
, si
->node_pages
);
316 seq_printf(s
, " - dents: %4lld in dirs:%4d (%4d)\n",
317 si
->ndirty_dent
, si
->ndirty_dirs
, si
->ndirty_all
);
318 seq_printf(s
, " - datas: %4lld in files:%4d\n",
319 si
->ndirty_data
, si
->ndirty_files
);
320 seq_printf(s
, " - meta: %4lld in %4d\n",
321 si
->ndirty_meta
, si
->meta_pages
);
322 seq_printf(s
, " - NATs: %9d/%9d\n - SITs: %9d/%9d\n",
323 si
->dirty_nats
, si
->nats
, si
->dirty_sits
, si
->sits
);
324 seq_printf(s
, " - free_nids: %9d\n",
326 seq_puts(s
, "\nDistribution of User Blocks:");
327 seq_puts(s
, " [ valid | invalid | free ]\n");
330 for (j
= 0; j
< si
->util_valid
; j
++)
334 for (j
= 0; j
< si
->util_invalid
; j
++)
338 for (j
= 0; j
< si
->util_free
; j
++)
340 seq_puts(s
, "]\n\n");
341 seq_printf(s
, "IPU: %u blocks\n", si
->inplace_count
);
342 seq_printf(s
, "SSR: %u blocks in %u segments\n",
343 si
->block_count
[SSR
], si
->segment_count
[SSR
]);
344 seq_printf(s
, "LFS: %u blocks in %u segments\n",
345 si
->block_count
[LFS
], si
->segment_count
[LFS
]);
347 /* segment usage info */
348 update_sit_info(si
->sbi
);
349 seq_printf(s
, "\nBDF: %u, avg. vblocks: %u\n",
350 si
->bimodal
, si
->avg_vblocks
);
352 /* memory footprint */
353 update_mem_info(si
->sbi
);
354 seq_printf(s
, "\nMemory: %llu KB\n",
355 (si
->base_mem
+ si
->cache_mem
+ si
->page_mem
) >> 10);
356 seq_printf(s
, " - static: %llu KB\n",
358 seq_printf(s
, " - cached: %llu KB\n",
359 si
->cache_mem
>> 10);
360 seq_printf(s
, " - paged : %llu KB\n",
363 mutex_unlock(&f2fs_stat_mutex
);
367 static int stat_open(struct inode
*inode
, struct file
*file
)
369 return single_open(file
, stat_show
, inode
->i_private
);
372 static const struct file_operations stat_fops
= {
376 .release
= single_release
,
379 int f2fs_build_stats(struct f2fs_sb_info
*sbi
)
381 struct f2fs_super_block
*raw_super
= F2FS_RAW_SUPER(sbi
);
382 struct f2fs_stat_info
*si
;
384 si
= kzalloc(sizeof(struct f2fs_stat_info
), GFP_KERNEL
);
388 si
->all_area_segs
= le32_to_cpu(raw_super
->segment_count
);
389 si
->sit_area_segs
= le32_to_cpu(raw_super
->segment_count_sit
);
390 si
->nat_area_segs
= le32_to_cpu(raw_super
->segment_count_nat
);
391 si
->ssa_area_segs
= le32_to_cpu(raw_super
->segment_count_ssa
);
392 si
->main_area_segs
= le32_to_cpu(raw_super
->segment_count_main
);
393 si
->main_area_sections
= le32_to_cpu(raw_super
->section_count
);
394 si
->main_area_zones
= si
->main_area_sections
/
395 le32_to_cpu(raw_super
->secs_per_zone
);
399 atomic64_set(&sbi
->total_hit_ext
, 0);
400 atomic64_set(&sbi
->read_hit_rbtree
, 0);
401 atomic64_set(&sbi
->read_hit_largest
, 0);
402 atomic64_set(&sbi
->read_hit_cached
, 0);
404 atomic_set(&sbi
->inline_xattr
, 0);
405 atomic_set(&sbi
->inline_inode
, 0);
406 atomic_set(&sbi
->inline_dir
, 0);
407 atomic_set(&sbi
->inplace_count
, 0);
409 mutex_lock(&f2fs_stat_mutex
);
410 list_add_tail(&si
->stat_list
, &f2fs_stat_list
);
411 mutex_unlock(&f2fs_stat_mutex
);
416 void f2fs_destroy_stats(struct f2fs_sb_info
*sbi
)
418 struct f2fs_stat_info
*si
= F2FS_STAT(sbi
);
420 mutex_lock(&f2fs_stat_mutex
);
421 list_del(&si
->stat_list
);
422 mutex_unlock(&f2fs_stat_mutex
);
427 int __init
f2fs_create_root_stats(void)
431 f2fs_debugfs_root
= debugfs_create_dir("f2fs", NULL
);
432 if (!f2fs_debugfs_root
)
435 file
= debugfs_create_file("status", S_IRUGO
, f2fs_debugfs_root
,
438 debugfs_remove(f2fs_debugfs_root
);
439 f2fs_debugfs_root
= NULL
;
446 void f2fs_destroy_root_stats(void)
448 if (!f2fs_debugfs_root
)
451 debugfs_remove_recursive(f2fs_debugfs_root
);
452 f2fs_debugfs_root
= NULL
;