From: Kent Overstreet Date: Sat, 11 Apr 2020 16:31:16 +0000 (-0400) Subject: bcachefs: Slightly reduce btree split threshold X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=f270667a7fc020f1711953ad3b0d6e6b38eba834;p=linux.git bcachefs: Slightly reduce btree split threshold 2/3rds performs a lot better than 3/4ths on the tested workloda, leading to significanly fewer btree node compactions. Signed-off-by: Kent Overstreet Signed-off-by: Kent Overstreet --- diff --git a/fs/bcachefs/btree_cache.h b/fs/bcachefs/btree_cache.h index abde6c2658c69..2160012c734f5 100644 --- a/fs/bcachefs/btree_cache.h +++ b/fs/bcachefs/btree_cache.h @@ -94,7 +94,7 @@ static inline unsigned btree_blocks(struct bch_fs *c) return c->opts.btree_node_size >> c->block_bits; } -#define BTREE_SPLIT_THRESHOLD(c) (btree_max_u64s(c) * 3 / 4) +#define BTREE_SPLIT_THRESHOLD(c) (btree_max_u64s(c) * 2 / 3) #define BTREE_FOREGROUND_MERGE_THRESHOLD(c) (btree_max_u64s(c) * 1 / 3) #define BTREE_FOREGROUND_MERGE_HYSTERESIS(c) \