f2fs: adjust showing of extent cache stat
This patch alters to replace total hit stat with rbtree hit stat,
and then adjust showing of extent cache stat:
Hit Count:
L1-1: for largest node hit count;
L1-2: for last cached node hit count;
L2: for extent node hit after lookuping in rbtree.
Hit Ratio:
ratio (hit count / total lookup count)
Inner Struct Count:
tree count, node count.
Before:
Extent Hit Ratio: 0 / 2
Extent Tree Count: 3
Extent Node Count: 2
Patched:
Exten Cacache:
- Hit Count: L1-1:4871 L1-2:2074 L2:208
- Hit Ratio: 1% (7153 / 550751)
- Inner Struct Count: tree: 26560, node: 11824
Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
diff --git a/fs/f2fs/debug.c b/fs/f2fs/debug.c
index 1a1a4c6..d013d84 100644
--- a/fs/f2fs/debug.c
+++ b/fs/f2fs/debug.c
@@ -35,7 +35,8 @@
/* validation check of the segment numbers */
si->hit_largest = atomic_read(&sbi->read_hit_largest);
si->hit_cached = atomic_read(&sbi->read_hit_cached);
- si->hit_ext = atomic_read(&sbi->read_hit_ext);
+ si->hit_rbtree = atomic_read(&sbi->read_hit_rbtree);
+ si->hit_total = si->hit_largest + si->hit_cached + si->hit_rbtree;
si->total_ext = atomic_read(&sbi->total_hit_ext);
si->ext_tree = sbi->total_ext_tree;
si->ext_node = atomic_read(&sbi->total_ext_node);
@@ -281,11 +282,16 @@
si->bg_data_blks);
seq_printf(s, " - node blocks : %d (%d)\n", si->node_blks,
si->bg_node_blks);
- seq_printf(s, "\nExtent Hit Ratio: L1-1:%d L1-2:%d L2:%d / %d\n",
+ seq_puts(s, "\nExtent Cache:\n");
+ seq_printf(s, " - Hit Count: L1-1:%d L1-2:%d L2:%d\n",
si->hit_largest, si->hit_cached,
- si->hit_ext, si->total_ext);
- seq_printf(s, "\nExtent Tree Count: %d\n", si->ext_tree);
- seq_printf(s, "\nExtent Node Count: %d\n", si->ext_node);
+ si->hit_rbtree);
+ seq_printf(s, " - Hit Ratio: %d%% (%d / %d)\n",
+ !si->total_ext ? 0 :
+ (si->hit_total * 100) / si->total_ext,
+ si->hit_total, si->total_ext);
+ seq_printf(s, " - Inner Struct Count: tree: %d, node: %d\n",
+ si->ext_tree, si->ext_node);
seq_puts(s, "\nBalancing F2FS Async:\n");
seq_printf(s, " - inmem: %4d, wb: %4d\n",
si->inmem_pages, si->wb_pages);
@@ -373,7 +379,7 @@
sbi->stat_info = si;
atomic_set(&sbi->total_hit_ext, 0);
- atomic_set(&sbi->read_hit_ext, 0);
+ atomic_set(&sbi->read_hit_rbtree, 0);
atomic_set(&sbi->read_hit_largest, 0);
atomic_set(&sbi->read_hit_cached, 0);