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Commit | Line | Data |
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0a8165d7 | 1 | /* |
902829aa GKH |
2 | * f2fs debugging statistics |
3 | * | |
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> | |
8 | * | |
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. | |
12 | */ | |
13 | ||
14 | #include <linux/fs.h> | |
15 | #include <linux/backing-dev.h> | |
902829aa GKH |
16 | #include <linux/f2fs_fs.h> |
17 | #include <linux/blkdev.h> | |
18 | #include <linux/debugfs.h> | |
19 | #include <linux/seq_file.h> | |
20 | ||
21 | #include "f2fs.h" | |
22 | #include "node.h" | |
23 | #include "segment.h" | |
24 | #include "gc.h" | |
25 | ||
26 | static LIST_HEAD(f2fs_stat_list); | |
40e1ebe9 | 27 | static struct dentry *f2fs_debugfs_root; |
66af62ce | 28 | static DEFINE_MUTEX(f2fs_stat_mutex); |
902829aa | 29 | |
25ca923b | 30 | static void update_general_status(struct f2fs_sb_info *sbi) |
902829aa | 31 | { |
963d4f7d | 32 | struct f2fs_stat_info *si = F2FS_STAT(sbi); |
902829aa GKH |
33 | int i; |
34 | ||
e1c42045 | 35 | /* validation check of the segment numbers */ |
902829aa GKH |
36 | si->hit_ext = sbi->read_hit_ext; |
37 | si->total_ext = sbi->total_hit_ext; | |
38 | si->ndirty_node = get_pages(sbi, F2FS_DIRTY_NODES); | |
39 | si->ndirty_dent = get_pages(sbi, F2FS_DIRTY_DENTS); | |
40 | si->ndirty_dirs = sbi->n_dirty_dirs; | |
41 | si->ndirty_meta = get_pages(sbi, F2FS_DIRTY_META); | |
42 | si->total_count = (int)sbi->user_block_count / sbi->blocks_per_seg; | |
43 | si->rsvd_segs = reserved_segments(sbi); | |
44 | si->overp_segs = overprovision_segments(sbi); | |
45 | si->valid_count = valid_user_blocks(sbi); | |
46 | si->valid_node_count = valid_node_count(sbi); | |
47 | si->valid_inode_count = valid_inode_count(sbi); | |
0dbdc2ae | 48 | si->inline_inode = sbi->inline_inode; |
902829aa GKH |
49 | si->utilization = utilization(sbi); |
50 | ||
51 | si->free_segs = free_segments(sbi); | |
52 | si->free_secs = free_sections(sbi); | |
53 | si->prefree_count = prefree_segments(sbi); | |
54 | si->dirty_count = dirty_segments(sbi); | |
4ef51a8f | 55 | si->node_pages = NODE_MAPPING(sbi)->nrpages; |
9df27d98 | 56 | si->meta_pages = META_MAPPING(sbi)->nrpages; |
902829aa GKH |
57 | si->nats = NM_I(sbi)->nat_cnt; |
58 | si->sits = SIT_I(sbi)->dirty_sentries; | |
59 | si->fnids = NM_I(sbi)->fcnt; | |
60 | si->bg_gc = sbi->bg_gc; | |
61 | si->util_free = (int)(free_user_blocks(sbi) >> sbi->log_blocks_per_seg) | |
62 | * 100 / (int)(sbi->user_block_count >> sbi->log_blocks_per_seg) | |
63 | / 2; | |
64 | si->util_valid = (int)(written_block_count(sbi) >> | |
65 | sbi->log_blocks_per_seg) | |
66 | * 100 / (int)(sbi->user_block_count >> sbi->log_blocks_per_seg) | |
67 | / 2; | |
68 | si->util_invalid = 50 - si->util_free - si->util_valid; | |
69 | for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_NODE; i++) { | |
70 | struct curseg_info *curseg = CURSEG_I(sbi, i); | |
71 | si->curseg[i] = curseg->segno; | |
72 | si->cursec[i] = curseg->segno / sbi->segs_per_sec; | |
73 | si->curzone[i] = si->cursec[i] / sbi->secs_per_zone; | |
74 | } | |
75 | ||
76 | for (i = 0; i < 2; i++) { | |
77 | si->segment_count[i] = sbi->segment_count[i]; | |
78 | si->block_count[i] = sbi->block_count[i]; | |
79 | } | |
80 | } | |
81 | ||
0a8165d7 | 82 | /* |
902829aa GKH |
83 | * This function calculates BDF of every segments |
84 | */ | |
85 | static void update_sit_info(struct f2fs_sb_info *sbi) | |
86 | { | |
963d4f7d | 87 | struct f2fs_stat_info *si = F2FS_STAT(sbi); |
902829aa | 88 | unsigned int blks_per_sec, hblks_per_sec, total_vblocks, bimodal, dist; |
902829aa GKH |
89 | unsigned int segno, vblocks; |
90 | int ndirty = 0; | |
91 | ||
92 | bimodal = 0; | |
93 | total_vblocks = 0; | |
94 | blks_per_sec = sbi->segs_per_sec * (1 << sbi->log_blocks_per_seg); | |
95 | hblks_per_sec = blks_per_sec / 2; | |
902829aa GKH |
96 | for (segno = 0; segno < TOTAL_SEGS(sbi); segno += sbi->segs_per_sec) { |
97 | vblocks = get_valid_blocks(sbi, segno, sbi->segs_per_sec); | |
98 | dist = abs(vblocks - hblks_per_sec); | |
99 | bimodal += dist * dist; | |
100 | ||
101 | if (vblocks > 0 && vblocks < blks_per_sec) { | |
102 | total_vblocks += vblocks; | |
103 | ndirty++; | |
104 | } | |
105 | } | |
53cf9522 | 106 | dist = TOTAL_SECS(sbi) * hblks_per_sec * hblks_per_sec / 100; |
902829aa GKH |
107 | si->bimodal = bimodal / dist; |
108 | if (si->dirty_count) | |
109 | si->avg_vblocks = total_vblocks / ndirty; | |
110 | else | |
111 | si->avg_vblocks = 0; | |
112 | } | |
113 | ||
0a8165d7 | 114 | /* |
902829aa GKH |
115 | * This function calculates memory footprint. |
116 | */ | |
117 | static void update_mem_info(struct f2fs_sb_info *sbi) | |
118 | { | |
963d4f7d | 119 | struct f2fs_stat_info *si = F2FS_STAT(sbi); |
902829aa GKH |
120 | unsigned npages; |
121 | ||
122 | if (si->base_mem) | |
123 | goto get_cache; | |
124 | ||
125 | si->base_mem = sizeof(struct f2fs_sb_info) + sbi->sb->s_blocksize; | |
126 | si->base_mem += 2 * sizeof(struct f2fs_inode_info); | |
127 | si->base_mem += sizeof(*sbi->ckpt); | |
128 | ||
129 | /* build sm */ | |
130 | si->base_mem += sizeof(struct f2fs_sm_info); | |
131 | ||
132 | /* build sit */ | |
133 | si->base_mem += sizeof(struct sit_info); | |
134 | si->base_mem += TOTAL_SEGS(sbi) * sizeof(struct seg_entry); | |
135 | si->base_mem += f2fs_bitmap_size(TOTAL_SEGS(sbi)); | |
136 | si->base_mem += 2 * SIT_VBLOCK_MAP_SIZE * TOTAL_SEGS(sbi); | |
137 | if (sbi->segs_per_sec > 1) | |
53cf9522 | 138 | si->base_mem += TOTAL_SECS(sbi) * sizeof(struct sec_entry); |
902829aa GKH |
139 | si->base_mem += __bitmap_size(sbi, SIT_BITMAP); |
140 | ||
141 | /* build free segmap */ | |
142 | si->base_mem += sizeof(struct free_segmap_info); | |
143 | si->base_mem += f2fs_bitmap_size(TOTAL_SEGS(sbi)); | |
53cf9522 | 144 | si->base_mem += f2fs_bitmap_size(TOTAL_SECS(sbi)); |
902829aa GKH |
145 | |
146 | /* build curseg */ | |
147 | si->base_mem += sizeof(struct curseg_info) * NR_CURSEG_TYPE; | |
148 | si->base_mem += PAGE_CACHE_SIZE * NR_CURSEG_TYPE; | |
149 | ||
150 | /* build dirty segmap */ | |
151 | si->base_mem += sizeof(struct dirty_seglist_info); | |
152 | si->base_mem += NR_DIRTY_TYPE * f2fs_bitmap_size(TOTAL_SEGS(sbi)); | |
5ec4e49f | 153 | si->base_mem += f2fs_bitmap_size(TOTAL_SECS(sbi)); |
902829aa | 154 | |
e1c42045 | 155 | /* build nm */ |
902829aa GKH |
156 | si->base_mem += sizeof(struct f2fs_nm_info); |
157 | si->base_mem += __bitmap_size(sbi, NAT_BITMAP); | |
158 | ||
159 | /* build gc */ | |
160 | si->base_mem += sizeof(struct f2fs_gc_kthread); | |
161 | ||
162 | get_cache: | |
163 | /* free nids */ | |
164 | si->cache_mem = NM_I(sbi)->fcnt; | |
165 | si->cache_mem += NM_I(sbi)->nat_cnt; | |
4ef51a8f | 166 | npages = NODE_MAPPING(sbi)->nrpages; |
902829aa | 167 | si->cache_mem += npages << PAGE_CACHE_SHIFT; |
9df27d98 | 168 | npages = META_MAPPING(sbi)->nrpages; |
902829aa | 169 | si->cache_mem += npages << PAGE_CACHE_SHIFT; |
6451e041 | 170 | si->cache_mem += sbi->n_orphans * sizeof(struct ino_entry); |
902829aa GKH |
171 | si->cache_mem += sbi->n_dirty_dirs * sizeof(struct dir_inode_entry); |
172 | } | |
173 | ||
174 | static int stat_show(struct seq_file *s, void *v) | |
175 | { | |
145b04e5 | 176 | struct f2fs_stat_info *si; |
902829aa GKH |
177 | int i = 0; |
178 | int j; | |
179 | ||
66af62ce | 180 | mutex_lock(&f2fs_stat_mutex); |
145b04e5 | 181 | list_for_each_entry(si, &f2fs_stat_list, stat_list) { |
f83759e2 | 182 | char devname[BDEVNAME_SIZE]; |
902829aa | 183 | |
902829aa GKH |
184 | update_general_status(si->sbi); |
185 | ||
f83759e2 | 186 | seq_printf(s, "\n=====[ partition info(%s). #%d ]=====\n", |
187 | bdevname(si->sbi->sb->s_bdev, devname), i++); | |
7880ceed HL |
188 | seq_printf(s, "[SB: 1] [CP: 2] [SIT: %d] [NAT: %d] ", |
189 | si->sit_area_segs, si->nat_area_segs); | |
902829aa GKH |
190 | seq_printf(s, "[SSA: %d] [MAIN: %d", |
191 | si->ssa_area_segs, si->main_area_segs); | |
192 | seq_printf(s, "(OverProv:%d Resv:%d)]\n\n", | |
193 | si->overp_segs, si->rsvd_segs); | |
194 | seq_printf(s, "Utilization: %d%% (%d valid blocks)\n", | |
195 | si->utilization, si->valid_count); | |
196 | seq_printf(s, " - Node: %u (Inode: %u, ", | |
197 | si->valid_node_count, si->valid_inode_count); | |
198 | seq_printf(s, "Other: %u)\n - Data: %u\n", | |
199 | si->valid_node_count - si->valid_inode_count, | |
200 | si->valid_count - si->valid_node_count); | |
0dbdc2ae JK |
201 | seq_printf(s, " - Inline_data Inode: %u\n", |
202 | si->inline_inode); | |
902829aa GKH |
203 | seq_printf(s, "\nMain area: %d segs, %d secs %d zones\n", |
204 | si->main_area_segs, si->main_area_sections, | |
205 | si->main_area_zones); | |
206 | seq_printf(s, " - COLD data: %d, %d, %d\n", | |
207 | si->curseg[CURSEG_COLD_DATA], | |
208 | si->cursec[CURSEG_COLD_DATA], | |
209 | si->curzone[CURSEG_COLD_DATA]); | |
210 | seq_printf(s, " - WARM data: %d, %d, %d\n", | |
211 | si->curseg[CURSEG_WARM_DATA], | |
212 | si->cursec[CURSEG_WARM_DATA], | |
213 | si->curzone[CURSEG_WARM_DATA]); | |
214 | seq_printf(s, " - HOT data: %d, %d, %d\n", | |
215 | si->curseg[CURSEG_HOT_DATA], | |
216 | si->cursec[CURSEG_HOT_DATA], | |
217 | si->curzone[CURSEG_HOT_DATA]); | |
218 | seq_printf(s, " - Dir dnode: %d, %d, %d\n", | |
219 | si->curseg[CURSEG_HOT_NODE], | |
220 | si->cursec[CURSEG_HOT_NODE], | |
221 | si->curzone[CURSEG_HOT_NODE]); | |
222 | seq_printf(s, " - File dnode: %d, %d, %d\n", | |
223 | si->curseg[CURSEG_WARM_NODE], | |
224 | si->cursec[CURSEG_WARM_NODE], | |
225 | si->curzone[CURSEG_WARM_NODE]); | |
226 | seq_printf(s, " - Indir nodes: %d, %d, %d\n", | |
227 | si->curseg[CURSEG_COLD_NODE], | |
228 | si->cursec[CURSEG_COLD_NODE], | |
229 | si->curzone[CURSEG_COLD_NODE]); | |
230 | seq_printf(s, "\n - Valid: %d\n - Dirty: %d\n", | |
231 | si->main_area_segs - si->dirty_count - | |
232 | si->prefree_count - si->free_segs, | |
233 | si->dirty_count); | |
234 | seq_printf(s, " - Prefree: %d\n - Free: %d (%d)\n\n", | |
235 | si->prefree_count, si->free_segs, si->free_secs); | |
942e0be6 | 236 | seq_printf(s, "CP calls: %d\n", si->cp_count); |
902829aa GKH |
237 | seq_printf(s, "GC calls: %d (BG: %d)\n", |
238 | si->call_count, si->bg_gc); | |
239 | seq_printf(s, " - data segments : %d\n", si->data_segs); | |
240 | seq_printf(s, " - node segments : %d\n", si->node_segs); | |
241 | seq_printf(s, "Try to move %d blocks\n", si->tot_blks); | |
242 | seq_printf(s, " - data blocks : %d\n", si->data_blks); | |
243 | seq_printf(s, " - node blocks : %d\n", si->node_blks); | |
244 | seq_printf(s, "\nExtent Hit Ratio: %d / %d\n", | |
245 | si->hit_ext, si->total_ext); | |
6c311ec6 | 246 | seq_puts(s, "\nBalancing F2FS Async:\n"); |
499046ab | 247 | seq_printf(s, " - nodes: %4d in %4d\n", |
902829aa | 248 | si->ndirty_node, si->node_pages); |
499046ab | 249 | seq_printf(s, " - dents: %4d in dirs:%4d\n", |
902829aa | 250 | si->ndirty_dent, si->ndirty_dirs); |
499046ab | 251 | seq_printf(s, " - meta: %4d in %4d\n", |
902829aa | 252 | si->ndirty_meta, si->meta_pages); |
a5f42010 JK |
253 | seq_printf(s, " - NATs: %9d\n - SITs: %9d\n", |
254 | si->nats, si->sits); | |
255 | seq_printf(s, " - free_nids: %9d\n", | |
256 | si->fnids); | |
2d219c51 GZ |
257 | seq_puts(s, "\nDistribution of User Blocks:"); |
258 | seq_puts(s, " [ valid | invalid | free ]\n"); | |
259 | seq_puts(s, " ["); | |
902829aa GKH |
260 | |
261 | for (j = 0; j < si->util_valid; j++) | |
2d219c51 GZ |
262 | seq_putc(s, '-'); |
263 | seq_putc(s, '|'); | |
902829aa GKH |
264 | |
265 | for (j = 0; j < si->util_invalid; j++) | |
2d219c51 GZ |
266 | seq_putc(s, '-'); |
267 | seq_putc(s, '|'); | |
902829aa GKH |
268 | |
269 | for (j = 0; j < si->util_free; j++) | |
2d219c51 GZ |
270 | seq_putc(s, '-'); |
271 | seq_puts(s, "]\n\n"); | |
902829aa GKH |
272 | seq_printf(s, "SSR: %u blocks in %u segments\n", |
273 | si->block_count[SSR], si->segment_count[SSR]); | |
274 | seq_printf(s, "LFS: %u blocks in %u segments\n", | |
275 | si->block_count[LFS], si->segment_count[LFS]); | |
276 | ||
277 | /* segment usage info */ | |
278 | update_sit_info(si->sbi); | |
279 | seq_printf(s, "\nBDF: %u, avg. vblocks: %u\n", | |
280 | si->bimodal, si->avg_vblocks); | |
281 | ||
282 | /* memory footprint */ | |
283 | update_mem_info(si->sbi); | |
284 | seq_printf(s, "\nMemory: %u KB = static: %u + cached: %u\n", | |
285 | (si->base_mem + si->cache_mem) >> 10, | |
286 | si->base_mem >> 10, si->cache_mem >> 10); | |
902829aa | 287 | } |
66af62ce | 288 | mutex_unlock(&f2fs_stat_mutex); |
902829aa GKH |
289 | return 0; |
290 | } | |
291 | ||
292 | static int stat_open(struct inode *inode, struct file *file) | |
293 | { | |
294 | return single_open(file, stat_show, inode->i_private); | |
295 | } | |
296 | ||
297 | static const struct file_operations stat_fops = { | |
298 | .open = stat_open, | |
299 | .read = seq_read, | |
300 | .llseek = seq_lseek, | |
301 | .release = single_release, | |
302 | }; | |
303 | ||
4589d25d | 304 | int f2fs_build_stats(struct f2fs_sb_info *sbi) |
902829aa GKH |
305 | { |
306 | struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi); | |
307 | struct f2fs_stat_info *si; | |
308 | ||
963d4f7d GZ |
309 | si = kzalloc(sizeof(struct f2fs_stat_info), GFP_KERNEL); |
310 | if (!si) | |
902829aa GKH |
311 | return -ENOMEM; |
312 | ||
902829aa GKH |
313 | si->all_area_segs = le32_to_cpu(raw_super->segment_count); |
314 | si->sit_area_segs = le32_to_cpu(raw_super->segment_count_sit); | |
315 | si->nat_area_segs = le32_to_cpu(raw_super->segment_count_nat); | |
316 | si->ssa_area_segs = le32_to_cpu(raw_super->segment_count_ssa); | |
317 | si->main_area_segs = le32_to_cpu(raw_super->segment_count_main); | |
318 | si->main_area_sections = le32_to_cpu(raw_super->section_count); | |
319 | si->main_area_zones = si->main_area_sections / | |
320 | le32_to_cpu(raw_super->secs_per_zone); | |
321 | si->sbi = sbi; | |
963d4f7d | 322 | sbi->stat_info = si; |
66af62ce | 323 | |
324 | mutex_lock(&f2fs_stat_mutex); | |
325 | list_add_tail(&si->stat_list, &f2fs_stat_list); | |
326 | mutex_unlock(&f2fs_stat_mutex); | |
327 | ||
902829aa GKH |
328 | return 0; |
329 | } | |
330 | ||
902829aa GKH |
331 | void f2fs_destroy_stats(struct f2fs_sb_info *sbi) |
332 | { | |
963d4f7d | 333 | struct f2fs_stat_info *si = F2FS_STAT(sbi); |
902829aa | 334 | |
66af62ce | 335 | mutex_lock(&f2fs_stat_mutex); |
902829aa | 336 | list_del(&si->stat_list); |
66af62ce | 337 | mutex_unlock(&f2fs_stat_mutex); |
338 | ||
963d4f7d | 339 | kfree(si); |
902829aa GKH |
340 | } |
341 | ||
4589d25d NJ |
342 | void __init f2fs_create_root_stats(void) |
343 | { | |
c524723e YL |
344 | struct dentry *file; |
345 | ||
40e1ebe9 YL |
346 | f2fs_debugfs_root = debugfs_create_dir("f2fs", NULL); |
347 | if (!f2fs_debugfs_root) | |
7a6c76b1 | 348 | return; |
c524723e | 349 | |
40e1ebe9 | 350 | file = debugfs_create_file("status", S_IRUGO, f2fs_debugfs_root, |
c524723e | 351 | NULL, &stat_fops); |
7a6c76b1 GZ |
352 | if (!file) { |
353 | debugfs_remove(f2fs_debugfs_root); | |
354 | f2fs_debugfs_root = NULL; | |
355 | } | |
4589d25d NJ |
356 | } |
357 | ||
358 | void f2fs_destroy_root_stats(void) | |
902829aa | 359 | { |
40e1ebe9 | 360 | if (!f2fs_debugfs_root) |
c524723e YL |
361 | return; |
362 | ||
40e1ebe9 YL |
363 | debugfs_remove_recursive(f2fs_debugfs_root); |
364 | f2fs_debugfs_root = NULL; | |
902829aa | 365 | } |