/* * f2fs debugging statistics * * Copyright (c) 2012 Samsung Electronics Co., Ltd. * http://www.samsung.com/ * Copyright (c) 2012 Linux Foundation * Copyright (c) 2012 Greg Kroah-Hartman <gregkh@linuxfoundation.org> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #include <linux/fs.h> #include <linux/backing-dev.h> #include <linux/f2fs_fs.h> #include <linux/blkdev.h> #include <linux/debugfs.h> #include <linux/seq_file.h> #include "f2fs.h" #include "node.h" #include "segment.h" #include "gc.h" static LIST_HEAD(f2fs_stat_list); static struct dentry *f2fs_debugfs_root; static DEFINE_MUTEX(f2fs_stat_mutex); static void update_general_status(struct f2fs_sb_info *sbi) { struct f2fs_stat_info *si = F2FS_STAT(sbi); int i; /* validation check of the segment numbers */ si->hit_largest = atomic64_read(&sbi->read_hit_largest); si->hit_cached = atomic64_read(&sbi->read_hit_cached); si->hit_rbtree = atomic64_read(&sbi->read_hit_rbtree); si->hit_total = si->hit_largest + si->hit_cached + si->hit_rbtree; si->total_ext = atomic64_read(&sbi->total_hit_ext); si->ext_tree = atomic_read(&sbi->total_ext_tree); si->zombie_tree = atomic_read(&sbi->total_zombie_tree); si->ext_node = atomic_read(&sbi->total_ext_node); si->ndirty_node = get_pages(sbi, F2FS_DIRTY_NODES); si->ndirty_dent = get_pages(sbi, F2FS_DIRTY_DENTS); si->ndirty_meta = get_pages(sbi, F2FS_DIRTY_META); si->ndirty_data = get_pages(sbi, F2FS_DIRTY_DATA); si->ndirty_imeta = get_pages(sbi, F2FS_DIRTY_IMETA); si->ndirty_dirs = sbi->ndirty_inode[DIR_INODE]; si->ndirty_files = sbi->ndirty_inode[FILE_INODE]; si->ndirty_all = sbi->ndirty_inode[DIRTY_META]; si->inmem_pages = get_pages(sbi, F2FS_INMEM_PAGES); si->nr_wb_cp_data = get_pages(sbi, F2FS_WB_CP_DATA); si->nr_wb_data = get_pages(sbi, F2FS_WB_DATA); si->total_count = (int)sbi->user_block_count / sbi->blocks_per_seg; si->rsvd_segs = reserved_segments(sbi); si->overp_segs = overprovision_segments(sbi); si->valid_count = valid_user_blocks(sbi); si->discard_blks = discard_blocks(sbi); si->valid_node_count = valid_node_count(sbi); si->valid_inode_count = valid_inode_count(sbi); si->inline_xattr = atomic_read(&sbi->inline_xattr); si->inline_inode = atomic_read(&sbi->inline_inode); si->inline_dir = atomic_read(&sbi->inline_dir); si->orphans = sbi->im[ORPHAN_INO].ino_num; si->utilization = utilization(sbi); si->free_segs = free_segments(sbi); si->free_secs = free_sections(sbi); si->prefree_count = prefree_segments(sbi); si->dirty_count = dirty_segments(sbi); si->node_pages = NODE_MAPPING(sbi)->nrpages; si->meta_pages = META_MAPPING(sbi)->nrpages; si->nats = NM_I(sbi)->nat_cnt; si->dirty_nats = NM_I(sbi)->dirty_nat_cnt; si->sits = MAIN_SEGS(sbi); si->dirty_sits = SIT_I(sbi)->dirty_sentries; si->free_nids = NM_I(sbi)->nid_cnt[FREE_NID_LIST]; si->alloc_nids = NM_I(sbi)->nid_cnt[ALLOC_NID_LIST]; si->bg_gc = sbi->bg_gc; si->util_free = (int)(free_user_blocks(sbi) >> sbi->log_blocks_per_seg) * 100 / (int)(sbi->user_block_count >> sbi->log_blocks_per_seg) / 2; si->util_valid = (int)(written_block_count(sbi) >> sbi->log_blocks_per_seg) * 100 / (int)(sbi->user_block_count >> sbi->log_blocks_per_seg) / 2; si->util_invalid = 50 - si->util_free - si->util_valid; for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_NODE; i++) { struct curseg_info *curseg = CURSEG_I(sbi, i); si->curseg[i] = curseg->segno; si->cursec[i] = curseg->segno / sbi->segs_per_sec; si->curzone[i] = si->cursec[i] / sbi->secs_per_zone; } for (i = 0; i < 2; i++) { si->segment_count[i] = sbi->segment_count[i]; si->block_count[i] = sbi->block_count[i]; } si->inplace_count = atomic_read(&sbi->inplace_count); } /* * This function calculates BDF of every segments */ static void update_sit_info(struct f2fs_sb_info *sbi) { struct f2fs_stat_info *si = F2FS_STAT(sbi); unsigned long long blks_per_sec, hblks_per_sec, total_vblocks; unsigned long long bimodal, dist; unsigned int segno, vblocks; int ndirty = 0; bimodal = 0; total_vblocks = 0; blks_per_sec = sbi->segs_per_sec * sbi->blocks_per_seg; hblks_per_sec = blks_per_sec / 2; for (segno = 0; segno < MAIN_SEGS(sbi); segno += sbi->segs_per_sec) { vblocks = get_valid_blocks(sbi, segno, sbi->segs_per_sec); dist = abs(vblocks - hblks_per_sec); bimodal += dist * dist; if (vblocks > 0 && vblocks < blks_per_sec) { total_vblocks += vblocks; ndirty++; } } dist = div_u64(MAIN_SECS(sbi) * hblks_per_sec * hblks_per_sec, 100); si->bimodal = div64_u64(bimodal, dist); if (si->dirty_count) si->avg_vblocks = div_u64(total_vblocks, ndirty); else si->avg_vblocks = 0; } /* * This function calculates memory footprint. */ static void update_mem_info(struct f2fs_sb_info *sbi) { struct f2fs_stat_info *si = F2FS_STAT(sbi); unsigned npages; int i; if (si->base_mem) goto get_cache; si->base_mem = sizeof(struct f2fs_sb_info) + sbi->sb->s_blocksize; si->base_mem += 2 * sizeof(struct f2fs_inode_info); si->base_mem += sizeof(*sbi->ckpt); si->base_mem += sizeof(struct percpu_counter) * NR_COUNT_TYPE; /* build sm */ si->base_mem += sizeof(struct f2fs_sm_info); /* build sit */ si->base_mem += sizeof(struct sit_info); si->base_mem += MAIN_SEGS(sbi) * sizeof(struct seg_entry); si->base_mem += f2fs_bitmap_size(MAIN_SEGS(sbi)); si->base_mem += 2 * SIT_VBLOCK_MAP_SIZE * MAIN_SEGS(sbi); if (f2fs_discard_en(sbi)) si->base_mem += SIT_VBLOCK_MAP_SIZE * MAIN_SEGS(sbi); si->base_mem += SIT_VBLOCK_MAP_SIZE; if (sbi->segs_per_sec > 1) si->base_mem += MAIN_SECS(sbi) * sizeof(struct sec_entry); si->base_mem += __bitmap_size(sbi, SIT_BITMAP); /* build free segmap */ si->base_mem += sizeof(struct free_segmap_info); si->base_mem += f2fs_bitmap_size(MAIN_SEGS(sbi)); si->base_mem += f2fs_bitmap_size(MAIN_SECS(sbi)); /* build curseg */ si->base_mem += sizeof(struct curseg_info) * NR_CURSEG_TYPE; si->base_mem += PAGE_SIZE * NR_CURSEG_TYPE; /* build dirty segmap */ si->base_mem += sizeof(struct dirty_seglist_info); si->base_mem += NR_DIRTY_TYPE * f2fs_bitmap_size(MAIN_SEGS(sbi)); si->base_mem += f2fs_bitmap_size(MAIN_SECS(sbi)); /* build nm */ si->base_mem += sizeof(struct f2fs_nm_info); si->base_mem += __bitmap_size(sbi, NAT_BITMAP); get_cache: si->cache_mem = 0; /* build gc */ if (sbi->gc_thread) si->cache_mem += sizeof(struct f2fs_gc_kthread); /* build merge flush thread */ if (SM_I(sbi)->cmd_control_info) si->cache_mem += sizeof(struct flush_cmd_control); /* free nids */ si->cache_mem += (NM_I(sbi)->nid_cnt[FREE_NID_LIST] + NM_I(sbi)->nid_cnt[ALLOC_NID_LIST]) * sizeof(struct free_nid); si->cache_mem += NM_I(sbi)->nat_cnt * sizeof(struct nat_entry); si->cache_mem += NM_I(sbi)->dirty_nat_cnt * sizeof(struct nat_entry_set); si->cache_mem += si->inmem_pages * sizeof(struct inmem_pages); for (i = 0; i <= ORPHAN_INO; i++) si->cache_mem += sbi->im[i].ino_num * sizeof(struct ino_entry); si->cache_mem += atomic_read(&sbi->total_ext_tree) * sizeof(struct extent_tree); si->cache_mem += atomic_read(&sbi->total_ext_node) * sizeof(struct extent_node); si->page_mem = 0; npages = NODE_MAPPING(sbi)->nrpages; si->page_mem += (unsigned long long)npages << PAGE_SHIFT; npages = META_MAPPING(sbi)->nrpages; si->page_mem += (unsigned long long)npages << PAGE_SHIFT; } static int stat_show(struct seq_file *s, void *v) { struct f2fs_stat_info *si; int i = 0; int j; mutex_lock(&f2fs_stat_mutex); list_for_each_entry(si, &f2fs_stat_list, stat_list) { update_general_status(si->sbi); seq_printf(s, "\n=====[ partition info(%pg). #%d, %s]=====\n", si->sbi->sb->s_bdev, i++, f2fs_readonly(si->sbi->sb) ? "RO": "RW"); seq_printf(s, "[SB: 1] [CP: 2] [SIT: %d] [NAT: %d] ", si->sit_area_segs, si->nat_area_segs); seq_printf(s, "[SSA: %d] [MAIN: %d", si->ssa_area_segs, si->main_area_segs); seq_printf(s, "(OverProv:%d Resv:%d)]\n\n", si->overp_segs, si->rsvd_segs); if (test_opt(si->sbi, DISCARD)) seq_printf(s, "Utilization: %u%% (%u valid blocks, %u discard blocks)\n", si->utilization, si->valid_count, si->discard_blks); else seq_printf(s, "Utilization: %u%% (%u valid blocks)\n", si->utilization, si->valid_count); seq_printf(s, " - Node: %u (Inode: %u, ", si->valid_node_count, si->valid_inode_count); seq_printf(s, "Other: %u)\n - Data: %u\n", si->valid_node_count - si->valid_inode_count, si->valid_count - si->valid_node_count); seq_printf(s, " - Inline_xattr Inode: %u\n", si->inline_xattr); seq_printf(s, " - Inline_data Inode: %u\n", si->inline_inode); seq_printf(s, " - Inline_dentry Inode: %u\n", si->inline_dir); seq_printf(s, " - Orphan Inode: %u\n", si->orphans); seq_printf(s, "\nMain area: %d segs, %d secs %d zones\n", si->main_area_segs, si->main_area_sections, si->main_area_zones); seq_printf(s, " - COLD data: %d, %d, %d\n", si->curseg[CURSEG_COLD_DATA], si->cursec[CURSEG_COLD_DATA], si->curzone[CURSEG_COLD_DATA]); seq_printf(s, " - WARM data: %d, %d, %d\n", si->curseg[CURSEG_WARM_DATA], si->cursec[CURSEG_WARM_DATA], si->curzone[CURSEG_WARM_DATA]); seq_printf(s, " - HOT data: %d, %d, %d\n", si->curseg[CURSEG_HOT_DATA], si->cursec[CURSEG_HOT_DATA], si->curzone[CURSEG_HOT_DATA]); seq_printf(s, " - Dir dnode: %d, %d, %d\n", si->curseg[CURSEG_HOT_NODE], si->cursec[CURSEG_HOT_NODE], si->curzone[CURSEG_HOT_NODE]); seq_printf(s, " - File dnode: %d, %d, %d\n", si->curseg[CURSEG_WARM_NODE], si->cursec[CURSEG_WARM_NODE], si->curzone[CURSEG_WARM_NODE]); seq_printf(s, " - Indir nodes: %d, %d, %d\n", si->curseg[CURSEG_COLD_NODE], si->cursec[CURSEG_COLD_NODE], si->curzone[CURSEG_COLD_NODE]); seq_printf(s, "\n - Valid: %d\n - Dirty: %d\n", si->main_area_segs - si->dirty_count - si->prefree_count - si->free_segs, si->dirty_count); seq_printf(s, " - Prefree: %d\n - Free: %d (%d)\n\n", si->prefree_count, si->free_segs, si->free_secs); seq_printf(s, "CP calls: %d (BG: %d)\n", si->cp_count, si->bg_cp_count); seq_printf(s, "GC calls: %d (BG: %d)\n", si->call_count, si->bg_gc); seq_printf(s, " - data segments : %d (%d)\n", si->data_segs, si->bg_data_segs); seq_printf(s, " - node segments : %d (%d)\n", si->node_segs, si->bg_node_segs); seq_printf(s, "Try to move %d blocks (BG: %d)\n", si->tot_blks, si->bg_data_blks + si->bg_node_blks); seq_printf(s, " - data blocks : %d (%d)\n", si->data_blks, si->bg_data_blks); seq_printf(s, " - node blocks : %d (%d)\n", si->node_blks, si->bg_node_blks); seq_puts(s, "\nExtent Cache:\n"); seq_printf(s, " - Hit Count: L1-1:%llu L1-2:%llu L2:%llu\n", si->hit_largest, si->hit_cached, si->hit_rbtree); seq_printf(s, " - Hit Ratio: %llu%% (%llu / %llu)\n", !si->total_ext ? 0 : div64_u64(si->hit_total * 100, si->total_ext), si->hit_total, si->total_ext); seq_printf(s, " - Inner Struct Count: tree: %d(%d), node: %d\n", si->ext_tree, si->zombie_tree, si->ext_node); seq_puts(s, "\nBalancing F2FS Async:\n"); seq_printf(s, " - inmem: %4d, wb_cp_data: %4d, wb_data: %4d\n", si->inmem_pages, si->nr_wb_cp_data, si->nr_wb_data); seq_printf(s, " - nodes: %4d in %4d\n", si->ndirty_node, si->node_pages); seq_printf(s, " - dents: %4d in dirs:%4d (%4d)\n", si->ndirty_dent, si->ndirty_dirs, si->ndirty_all); seq_printf(s, " - datas: %4d in files:%4d\n", si->ndirty_data, si->ndirty_files); seq_printf(s, " - meta: %4d in %4d\n", si->ndirty_meta, si->meta_pages); seq_printf(s, " - imeta: %4d\n", si->ndirty_imeta); seq_printf(s, " - NATs: %9d/%9d\n - SITs: %9d/%9d\n", si->dirty_nats, si->nats, si->dirty_sits, si->sits); seq_printf(s, " - free_nids: %9d, alloc_nids: %9d\n", si->free_nids, si->alloc_nids); seq_puts(s, "\nDistribution of User Blocks:"); seq_puts(s, " [ valid | invalid | free ]\n"); seq_puts(s, " ["); for (j = 0; j < si->util_valid; j++) seq_putc(s, '-'); seq_putc(s, '|'); for (j = 0; j < si->util_invalid; j++) seq_putc(s, '-'); seq_putc(s, '|'); for (j = 0; j < si->util_free; j++) seq_putc(s, '-'); seq_puts(s, "]\n\n"); seq_printf(s, "IPU: %u blocks\n", si->inplace_count); seq_printf(s, "SSR: %u blocks in %u segments\n", si->block_count[SSR], si->segment_count[SSR]); seq_printf(s, "LFS: %u blocks in %u segments\n", si->block_count[LFS], si->segment_count[LFS]); /* segment usage info */ update_sit_info(si->sbi); seq_printf(s, "\nBDF: %u, avg. vblocks: %u\n", si->bimodal, si->avg_vblocks); /* memory footprint */ update_mem_info(si->sbi); seq_printf(s, "\nMemory: %llu KB\n", (si->base_mem + si->cache_mem + si->page_mem) >> 10); seq_printf(s, " - static: %llu KB\n", si->base_mem >> 10); seq_printf(s, " - cached: %llu KB\n", si->cache_mem >> 10); seq_printf(s, " - paged : %llu KB\n", si->page_mem >> 10); } mutex_unlock(&f2fs_stat_mutex); return 0; } static int stat_open(struct inode *inode, struct file *file) { return single_open(file, stat_show, inode->i_private); } static const struct file_operations stat_fops = { .owner = THIS_MODULE, .open = stat_open, .read = seq_read, .llseek = seq_lseek, .release = single_release, }; int f2fs_build_stats(struct f2fs_sb_info *sbi) { struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi); struct f2fs_stat_info *si; si = kzalloc(sizeof(struct f2fs_stat_info), GFP_KERNEL); if (!si) return -ENOMEM; si->all_area_segs = le32_to_cpu(raw_super->segment_count); si->sit_area_segs = le32_to_cpu(raw_super->segment_count_sit); si->nat_area_segs = le32_to_cpu(raw_super->segment_count_nat); si->ssa_area_segs = le32_to_cpu(raw_super->segment_count_ssa); si->main_area_segs = le32_to_cpu(raw_super->segment_count_main); si->main_area_sections = le32_to_cpu(raw_super->section_count); si->main_area_zones = si->main_area_sections / le32_to_cpu(raw_super->secs_per_zone); si->sbi = sbi; sbi->stat_info = si; atomic64_set(&sbi->total_hit_ext, 0); atomic64_set(&sbi->read_hit_rbtree, 0); atomic64_set(&sbi->read_hit_largest, 0); atomic64_set(&sbi->read_hit_cached, 0); atomic_set(&sbi->inline_xattr, 0); atomic_set(&sbi->inline_inode, 0); atomic_set(&sbi->inline_dir, 0); atomic_set(&sbi->inplace_count, 0); mutex_lock(&f2fs_stat_mutex); list_add_tail(&si->stat_list, &f2fs_stat_list); mutex_unlock(&f2fs_stat_mutex); return 0; } void f2fs_destroy_stats(struct f2fs_sb_info *sbi) { struct f2fs_stat_info *si = F2FS_STAT(sbi); mutex_lock(&f2fs_stat_mutex); list_del(&si->stat_list); mutex_unlock(&f2fs_stat_mutex); kfree(si); } int __init f2fs_create_root_stats(void) { struct dentry *file; f2fs_debugfs_root = debugfs_create_dir("f2fs", NULL); if (!f2fs_debugfs_root) return -ENOMEM; file = debugfs_create_file("status", S_IRUGO, f2fs_debugfs_root, NULL, &stat_fops); if (!file) { debugfs_remove(f2fs_debugfs_root); f2fs_debugfs_root = NULL; return -ENOMEM; } return 0; } void f2fs_destroy_root_stats(void) { if (!f2fs_debugfs_root) return; debugfs_remove_recursive(f2fs_debugfs_root); f2fs_debugfs_root = NULL; }