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| author |   Qu Wenruo <wqu@suse.com> | 2018-09-27 14:42:29 +0800 |
|---|---|---|
| committer |   David Sterba <dsterba@suse.com> | 2018-10-15 17:23:36 +0200 |
| commit | c337e7b02f71c4b2f6f2138807a284d2c4e1ac5e (patch) | |
| tree | 136cbe7591e6c48aa1b61a6d470d68e1dcdbe0a1 /fs/btrfs/qgroup.c | |
| parent | btrfs: relocation: Add basic extent backref related comments for build_backref_tree (diff) | |
| download | linux-dev-c337e7b02f71c4b2f6f2138807a284d2c4e1ac5e.tar.xz linux-dev-c337e7b02f71c4b2f6f2138807a284d2c4e1ac5e.zip | |
btrfs: qgroup: Introduce trace event to analyse the number of dirty extents accounted
Number of qgroup dirty extents is directly linked to the performance
overhead, so add a new trace event, trace_qgroup_num_dirty_extents(), to
record how many dirty extents is processed in
btrfs_qgroup_account_extents().
This will be pretty handy to analyze later balance performance
improvement.
Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/qgroup.c')
| -rw-r--r-- | fs/btrfs/qgroup.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/btrfs/qgroup.c b/fs/btrfs/qgroup.c index bdd8c0da6e32..8a03adc11f53 100644 --- a/fs/btrfs/qgroup.c +++ b/fs/btrfs/qgroup.c @@ -2132,6 +2132,7 @@ int btrfs_qgroup_account_extents(struct btrfs_trans_handle *trans) struct btrfs_delayed_ref_root *delayed_refs; struct ulist *new_roots = NULL; struct rb_node *node; + u64 num_dirty_extents = 0; u64 qgroup_to_skip; int ret = 0; @@ -2141,6 +2142,7 @@ int btrfs_qgroup_account_extents(struct btrfs_trans_handle *trans) record = rb_entry(node, struct btrfs_qgroup_extent_record, node); + num_dirty_extents++; trace_btrfs_qgroup_account_extents(fs_info, record); if (!ret) { @@ -2186,6 +2188,8 @@ cleanup: kfree(record); } + trace_qgroup_num_dirty_extents(fs_info, trans->transid, + num_dirty_extents); return ret; } |