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_ext
= sbi
->read_hit_ext
;
37 si
->total_ext
= sbi
->total_hit_ext
;
38 si
->ext_tree
= sbi
->total_ext_tree
;
39 si
->ext_node
= atomic_read(&sbi
->total_ext_node
);
40 si
->ndirty_node
= get_pages(sbi
, F2FS_DIRTY_NODES
);
41 si
->ndirty_dent
= get_pages(sbi
, F2FS_DIRTY_DENTS
);
42 si
->ndirty_dirs
= sbi
->n_dirty_dirs
;
43 si
->ndirty_meta
= get_pages(sbi
, F2FS_DIRTY_META
);
44 si
->inmem_pages
= get_pages(sbi
, F2FS_INMEM_PAGES
);
45 si
->wb_pages
= get_pages(sbi
, F2FS_WRITEBACK
);
46 si
->total_count
= (int)sbi
->user_block_count
/ sbi
->blocks_per_seg
;
47 si
->rsvd_segs
= reserved_segments(sbi
);
48 si
->overp_segs
= overprovision_segments(sbi
);
49 si
->valid_count
= valid_user_blocks(sbi
);
50 si
->valid_node_count
= valid_node_count(sbi
);
51 si
->valid_inode_count
= valid_inode_count(sbi
);
52 si
->inline_inode
= atomic_read(&sbi
->inline_inode
);
53 si
->inline_dir
= atomic_read(&sbi
->inline_dir
);
54 si
->utilization
= utilization(sbi
);
56 si
->free_segs
= free_segments(sbi
);
57 si
->free_secs
= free_sections(sbi
);
58 si
->prefree_count
= prefree_segments(sbi
);
59 si
->dirty_count
= dirty_segments(sbi
);
60 si
->node_pages
= NODE_MAPPING(sbi
)->nrpages
;
61 si
->meta_pages
= META_MAPPING(sbi
)->nrpages
;
62 si
->nats
= NM_I(sbi
)->nat_cnt
;
63 si
->dirty_nats
= NM_I(sbi
)->dirty_nat_cnt
;
64 si
->sits
= MAIN_SEGS(sbi
);
65 si
->dirty_sits
= SIT_I(sbi
)->dirty_sentries
;
66 si
->fnids
= NM_I(sbi
)->fcnt
;
67 si
->bg_gc
= sbi
->bg_gc
;
68 si
->util_free
= (int)(free_user_blocks(sbi
) >> sbi
->log_blocks_per_seg
)
69 * 100 / (int)(sbi
->user_block_count
>> sbi
->log_blocks_per_seg
)
71 si
->util_valid
= (int)(written_block_count(sbi
) >>
72 sbi
->log_blocks_per_seg
)
73 * 100 / (int)(sbi
->user_block_count
>> sbi
->log_blocks_per_seg
)
75 si
->util_invalid
= 50 - si
->util_free
- si
->util_valid
;
76 for (i
= CURSEG_HOT_DATA
; i
<= CURSEG_COLD_NODE
; i
++) {
77 struct curseg_info
*curseg
= CURSEG_I(sbi
, i
);
78 si
->curseg
[i
] = curseg
->segno
;
79 si
->cursec
[i
] = curseg
->segno
/ sbi
->segs_per_sec
;
80 si
->curzone
[i
] = si
->cursec
[i
] / sbi
->secs_per_zone
;
83 for (i
= 0; i
< 2; i
++) {
84 si
->segment_count
[i
] = sbi
->segment_count
[i
];
85 si
->block_count
[i
] = sbi
->block_count
[i
];
88 si
->inplace_count
= atomic_read(&sbi
->inplace_count
);
92 * This function calculates BDF of every segments
94 static void update_sit_info(struct f2fs_sb_info
*sbi
)
96 struct f2fs_stat_info
*si
= F2FS_STAT(sbi
);
97 unsigned long long blks_per_sec
, hblks_per_sec
, total_vblocks
;
98 unsigned long long bimodal
, dist
;
99 unsigned int segno
, vblocks
;
104 blks_per_sec
= sbi
->segs_per_sec
* (1 << sbi
->log_blocks_per_seg
);
105 hblks_per_sec
= blks_per_sec
/ 2;
106 for (segno
= 0; segno
< MAIN_SEGS(sbi
); segno
+= sbi
->segs_per_sec
) {
107 vblocks
= get_valid_blocks(sbi
, segno
, sbi
->segs_per_sec
);
108 dist
= abs(vblocks
- hblks_per_sec
);
109 bimodal
+= dist
* dist
;
111 if (vblocks
> 0 && vblocks
< blks_per_sec
) {
112 total_vblocks
+= vblocks
;
116 dist
= div_u64(MAIN_SECS(sbi
) * hblks_per_sec
* hblks_per_sec
, 100);
117 si
->bimodal
= div_u64(bimodal
, dist
);
119 si
->avg_vblocks
= div_u64(total_vblocks
, ndirty
);
125 * This function calculates memory footprint.
127 static void update_mem_info(struct f2fs_sb_info
*sbi
)
129 struct f2fs_stat_info
*si
= F2FS_STAT(sbi
);
136 si
->base_mem
= sizeof(struct f2fs_sb_info
) + sbi
->sb
->s_blocksize
;
137 si
->base_mem
+= 2 * sizeof(struct f2fs_inode_info
);
138 si
->base_mem
+= sizeof(*sbi
->ckpt
);
141 si
->base_mem
+= sizeof(struct f2fs_sm_info
);
144 si
->base_mem
+= sizeof(struct sit_info
);
145 si
->base_mem
+= MAIN_SEGS(sbi
) * sizeof(struct seg_entry
);
146 si
->base_mem
+= f2fs_bitmap_size(MAIN_SEGS(sbi
));
147 si
->base_mem
+= 3 * SIT_VBLOCK_MAP_SIZE
* MAIN_SEGS(sbi
);
148 si
->base_mem
+= SIT_VBLOCK_MAP_SIZE
;
149 if (sbi
->segs_per_sec
> 1)
150 si
->base_mem
+= MAIN_SECS(sbi
) * sizeof(struct sec_entry
);
151 si
->base_mem
+= __bitmap_size(sbi
, SIT_BITMAP
);
153 /* build free segmap */
154 si
->base_mem
+= sizeof(struct free_segmap_info
);
155 si
->base_mem
+= f2fs_bitmap_size(MAIN_SEGS(sbi
));
156 si
->base_mem
+= f2fs_bitmap_size(MAIN_SECS(sbi
));
159 si
->base_mem
+= sizeof(struct curseg_info
) * NR_CURSEG_TYPE
;
160 si
->base_mem
+= PAGE_CACHE_SIZE
* NR_CURSEG_TYPE
;
162 /* build dirty segmap */
163 si
->base_mem
+= sizeof(struct dirty_seglist_info
);
164 si
->base_mem
+= NR_DIRTY_TYPE
* f2fs_bitmap_size(MAIN_SEGS(sbi
));
165 si
->base_mem
+= f2fs_bitmap_size(MAIN_SECS(sbi
));
168 si
->base_mem
+= sizeof(struct f2fs_nm_info
);
169 si
->base_mem
+= __bitmap_size(sbi
, NAT_BITMAP
);
176 si
->cache_mem
+= sizeof(struct f2fs_gc_kthread
);
178 /* build merge flush thread */
179 if (SM_I(sbi
)->cmd_control_info
)
180 si
->cache_mem
+= sizeof(struct flush_cmd_control
);
183 si
->cache_mem
+= NM_I(sbi
)->fcnt
* sizeof(struct free_nid
);
184 si
->cache_mem
+= NM_I(sbi
)->nat_cnt
* sizeof(struct nat_entry
);
185 si
->cache_mem
+= NM_I(sbi
)->dirty_nat_cnt
*
186 sizeof(struct nat_entry_set
);
187 si
->cache_mem
+= si
->inmem_pages
* sizeof(struct inmem_pages
);
188 si
->cache_mem
+= sbi
->n_dirty_dirs
* sizeof(struct inode_entry
);
189 for (i
= 0; i
<= UPDATE_INO
; i
++)
190 si
->cache_mem
+= sbi
->im
[i
].ino_num
* sizeof(struct ino_entry
);
191 si
->cache_mem
+= sbi
->total_ext_tree
* sizeof(struct extent_tree
);
192 si
->cache_mem
+= atomic_read(&sbi
->total_ext_node
) *
193 sizeof(struct extent_node
);
196 npages
= NODE_MAPPING(sbi
)->nrpages
;
197 si
->page_mem
+= npages
<< PAGE_CACHE_SHIFT
;
198 npages
= META_MAPPING(sbi
)->nrpages
;
199 si
->page_mem
+= npages
<< PAGE_CACHE_SHIFT
;
202 static int stat_show(struct seq_file
*s
, void *v
)
204 struct f2fs_stat_info
*si
;
208 mutex_lock(&f2fs_stat_mutex
);
209 list_for_each_entry(si
, &f2fs_stat_list
, stat_list
) {
210 char devname
[BDEVNAME_SIZE
];
212 update_general_status(si
->sbi
);
214 seq_printf(s
, "\n=====[ partition info(%s). #%d ]=====\n",
215 bdevname(si
->sbi
->sb
->s_bdev
, devname
), i
++);
216 seq_printf(s
, "[SB: 1] [CP: 2] [SIT: %d] [NAT: %d] ",
217 si
->sit_area_segs
, si
->nat_area_segs
);
218 seq_printf(s
, "[SSA: %d] [MAIN: %d",
219 si
->ssa_area_segs
, si
->main_area_segs
);
220 seq_printf(s
, "(OverProv:%d Resv:%d)]\n\n",
221 si
->overp_segs
, si
->rsvd_segs
);
222 seq_printf(s
, "Utilization: %d%% (%d valid blocks)\n",
223 si
->utilization
, si
->valid_count
);
224 seq_printf(s
, " - Node: %u (Inode: %u, ",
225 si
->valid_node_count
, si
->valid_inode_count
);
226 seq_printf(s
, "Other: %u)\n - Data: %u\n",
227 si
->valid_node_count
- si
->valid_inode_count
,
228 si
->valid_count
- si
->valid_node_count
);
229 seq_printf(s
, " - Inline_data Inode: %u\n",
231 seq_printf(s
, " - Inline_dentry Inode: %u\n",
233 seq_printf(s
, "\nMain area: %d segs, %d secs %d zones\n",
234 si
->main_area_segs
, si
->main_area_sections
,
235 si
->main_area_zones
);
236 seq_printf(s
, " - COLD data: %d, %d, %d\n",
237 si
->curseg
[CURSEG_COLD_DATA
],
238 si
->cursec
[CURSEG_COLD_DATA
],
239 si
->curzone
[CURSEG_COLD_DATA
]);
240 seq_printf(s
, " - WARM data: %d, %d, %d\n",
241 si
->curseg
[CURSEG_WARM_DATA
],
242 si
->cursec
[CURSEG_WARM_DATA
],
243 si
->curzone
[CURSEG_WARM_DATA
]);
244 seq_printf(s
, " - HOT data: %d, %d, %d\n",
245 si
->curseg
[CURSEG_HOT_DATA
],
246 si
->cursec
[CURSEG_HOT_DATA
],
247 si
->curzone
[CURSEG_HOT_DATA
]);
248 seq_printf(s
, " - Dir dnode: %d, %d, %d\n",
249 si
->curseg
[CURSEG_HOT_NODE
],
250 si
->cursec
[CURSEG_HOT_NODE
],
251 si
->curzone
[CURSEG_HOT_NODE
]);
252 seq_printf(s
, " - File dnode: %d, %d, %d\n",
253 si
->curseg
[CURSEG_WARM_NODE
],
254 si
->cursec
[CURSEG_WARM_NODE
],
255 si
->curzone
[CURSEG_WARM_NODE
]);
256 seq_printf(s
, " - Indir nodes: %d, %d, %d\n",
257 si
->curseg
[CURSEG_COLD_NODE
],
258 si
->cursec
[CURSEG_COLD_NODE
],
259 si
->curzone
[CURSEG_COLD_NODE
]);
260 seq_printf(s
, "\n - Valid: %d\n - Dirty: %d\n",
261 si
->main_area_segs
- si
->dirty_count
-
262 si
->prefree_count
- si
->free_segs
,
264 seq_printf(s
, " - Prefree: %d\n - Free: %d (%d)\n\n",
265 si
->prefree_count
, si
->free_segs
, si
->free_secs
);
266 seq_printf(s
, "CP calls: %d\n", si
->cp_count
);
267 seq_printf(s
, "GC calls: %d (BG: %d)\n",
268 si
->call_count
, si
->bg_gc
);
269 seq_printf(s
, " - data segments : %d (%d)\n",
270 si
->data_segs
, si
->bg_data_segs
);
271 seq_printf(s
, " - node segments : %d (%d)\n",
272 si
->node_segs
, si
->bg_node_segs
);
273 seq_printf(s
, "Try to move %d blocks (BG: %d)\n", si
->tot_blks
,
274 si
->bg_data_blks
+ si
->bg_node_blks
);
275 seq_printf(s
, " - data blocks : %d (%d)\n", si
->data_blks
,
277 seq_printf(s
, " - node blocks : %d (%d)\n", si
->node_blks
,
279 seq_printf(s
, "\nExtent Hit Ratio: %d / %d\n",
280 si
->hit_ext
, si
->total_ext
);
281 seq_printf(s
, "\nExtent Tree Count: %d\n", si
->ext_tree
);
282 seq_printf(s
, "\nExtent Node Count: %d\n", si
->ext_node
);
283 seq_puts(s
, "\nBalancing F2FS Async:\n");
284 seq_printf(s
, " - inmem: %4d, wb: %4d\n",
285 si
->inmem_pages
, si
->wb_pages
);
286 seq_printf(s
, " - nodes: %4d in %4d\n",
287 si
->ndirty_node
, si
->node_pages
);
288 seq_printf(s
, " - dents: %4d in dirs:%4d\n",
289 si
->ndirty_dent
, si
->ndirty_dirs
);
290 seq_printf(s
, " - meta: %4d in %4d\n",
291 si
->ndirty_meta
, si
->meta_pages
);
292 seq_printf(s
, " - NATs: %9d/%9d\n - SITs: %9d/%9d\n",
293 si
->dirty_nats
, si
->nats
, si
->dirty_sits
, si
->sits
);
294 seq_printf(s
, " - free_nids: %9d\n",
296 seq_puts(s
, "\nDistribution of User Blocks:");
297 seq_puts(s
, " [ valid | invalid | free ]\n");
300 for (j
= 0; j
< si
->util_valid
; j
++)
304 for (j
= 0; j
< si
->util_invalid
; j
++)
308 for (j
= 0; j
< si
->util_free
; j
++)
310 seq_puts(s
, "]\n\n");
311 seq_printf(s
, "IPU: %u blocks\n", si
->inplace_count
);
312 seq_printf(s
, "SSR: %u blocks in %u segments\n",
313 si
->block_count
[SSR
], si
->segment_count
[SSR
]);
314 seq_printf(s
, "LFS: %u blocks in %u segments\n",
315 si
->block_count
[LFS
], si
->segment_count
[LFS
]);
317 /* segment usage info */
318 update_sit_info(si
->sbi
);
319 seq_printf(s
, "\nBDF: %u, avg. vblocks: %u\n",
320 si
->bimodal
, si
->avg_vblocks
);
322 /* memory footprint */
323 update_mem_info(si
->sbi
);
324 seq_printf(s
, "\nMemory: %u KB\n",
325 (si
->base_mem
+ si
->cache_mem
+ si
->page_mem
) >> 10);
326 seq_printf(s
, " - static: %u KB\n",
328 seq_printf(s
, " - cached: %u KB\n",
329 si
->cache_mem
>> 10);
330 seq_printf(s
, " - paged : %u KB\n",
333 mutex_unlock(&f2fs_stat_mutex
);
337 static int stat_open(struct inode
*inode
, struct file
*file
)
339 return single_open(file
, stat_show
, inode
->i_private
);
342 static const struct file_operations stat_fops
= {
346 .release
= single_release
,
349 int f2fs_build_stats(struct f2fs_sb_info
*sbi
)
351 struct f2fs_super_block
*raw_super
= F2FS_RAW_SUPER(sbi
);
352 struct f2fs_stat_info
*si
;
354 si
= kzalloc(sizeof(struct f2fs_stat_info
), GFP_KERNEL
);
358 si
->all_area_segs
= le32_to_cpu(raw_super
->segment_count
);
359 si
->sit_area_segs
= le32_to_cpu(raw_super
->segment_count_sit
);
360 si
->nat_area_segs
= le32_to_cpu(raw_super
->segment_count_nat
);
361 si
->ssa_area_segs
= le32_to_cpu(raw_super
->segment_count_ssa
);
362 si
->main_area_segs
= le32_to_cpu(raw_super
->segment_count_main
);
363 si
->main_area_sections
= le32_to_cpu(raw_super
->section_count
);
364 si
->main_area_zones
= si
->main_area_sections
/
365 le32_to_cpu(raw_super
->secs_per_zone
);
369 atomic_set(&sbi
->inline_inode
, 0);
370 atomic_set(&sbi
->inline_dir
, 0);
371 atomic_set(&sbi
->inplace_count
, 0);
373 mutex_lock(&f2fs_stat_mutex
);
374 list_add_tail(&si
->stat_list
, &f2fs_stat_list
);
375 mutex_unlock(&f2fs_stat_mutex
);
380 void f2fs_destroy_stats(struct f2fs_sb_info
*sbi
)
382 struct f2fs_stat_info
*si
= F2FS_STAT(sbi
);
384 mutex_lock(&f2fs_stat_mutex
);
385 list_del(&si
->stat_list
);
386 mutex_unlock(&f2fs_stat_mutex
);
391 void __init
f2fs_create_root_stats(void)
395 f2fs_debugfs_root
= debugfs_create_dir("f2fs", NULL
);
396 if (!f2fs_debugfs_root
)
399 file
= debugfs_create_file("status", S_IRUGO
, f2fs_debugfs_root
,
402 debugfs_remove(f2fs_debugfs_root
);
403 f2fs_debugfs_root
= NULL
;
407 void f2fs_destroy_root_stats(void)
409 if (!f2fs_debugfs_root
)
412 debugfs_remove_recursive(f2fs_debugfs_root
);
413 f2fs_debugfs_root
= NULL
;