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authorChao Yu <chao2.yu@samsung.com>2015-08-19 14:13:25 +0300
committerJaegeuk Kim <jaegeuk@kernel.org>2015-08-22 08:45:16 +0300
commit029e13cc3221be4bc46909225142277fee52c37e (patch)
tree6b649cc7932090fbb00ddab9a5b5eb6b8b40c843 /fs/f2fs/extent_cache.c
parent91c481fff92c705dd382f1f53c01e6b6b88507d0 (diff)
downloadlinux-029e13cc3221be4bc46909225142277fee52c37e.tar.xz
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>
Diffstat (limited to 'fs/f2fs/extent_cache.c')
-rw-r--r--fs/f2fs/extent_cache.c10
1 files changed, 5 insertions, 5 deletions
diff --git a/fs/f2fs/extent_cache.c b/fs/f2fs/extent_cache.c
index 5cf217faed1f..d11735aa3cac 100644
--- a/fs/f2fs/extent_cache.c
+++ b/fs/f2fs/extent_cache.c
@@ -99,12 +99,14 @@ static struct extent_node *__lookup_extent_tree(struct f2fs_sb_info *sbi,
while (node) {
en = rb_entry(node, struct extent_node, rb_node);
- if (fofs < en->ei.fofs)
+ if (fofs < en->ei.fofs) {
node = node->rb_left;
- else if (fofs >= en->ei.fofs + en->ei.len)
+ } else if (fofs >= en->ei.fofs + en->ei.len) {
node = node->rb_right;
- else
+ } else {
+ stat_inc_rbtree_node_hit(sbi);
return en;
+ }
}
return NULL;
}
@@ -281,7 +283,6 @@ static bool f2fs_lookup_extent_tree(struct inode *inode, pgoff_t pgofs,
et->largest.fofs + et->largest.len > pgofs) {
*ei = et->largest;
ret = true;
- stat_inc_read_hit(sbi);
stat_inc_largest_node_hit(sbi);
goto out;
}
@@ -295,7 +296,6 @@ static bool f2fs_lookup_extent_tree(struct inode *inode, pgoff_t pgofs,
et->cached_en = en;
spin_unlock(&sbi->extent_lock);
ret = true;
- stat_inc_read_hit(sbi);
}
out:
stat_inc_total_hit(sbi);