[PATCH 0/7] btrfs: more performance improvements for dbench workloads

From: fdmanana@kernel.org
To: linux-btrfs@vger.kernel.org
Subject: [PATCH 0/7] btrfs: more performance improvements for dbench workloads
Date: Wed, 27 Jan 2021 10:34:53 +0000	[thread overview]
Message-ID: <cover.1611742865.git.fdmanana@suse.com> (raw)

From: Filipe Manana <fdmanana@suse.com>

The following patchset brings one more batch of performance improvements
with dbench workloads, or anything that mixes file creation, file writes,
renames, unlinks, etc with fsync like dbench does. This patchset is mostly
based on avoiding logging directory inodes multiple times when not necessary,
falling back to transaction commits less frequently and often waiting less
time for transaction commits to complete. Performance results are listed in
the change log of the last patch, but in short, I've experienced a reduction
of maximum latency up to about -40% and throuhput gains up to about +6%.

Filipe Manana (7):
  btrfs: remove unnecessary directory inode item update when deleting dir entry
  btrfs: stop setting nbytes when filling inode item for logging
  btrfs: avoid logging new ancestor inodes when logging new inode
  btrfs: skip logging directories already logged when logging all parents
  btrfs: skip logging inodes already logged when logging new entries
  btrfs: remove unnecessary check_parent_dirs_for_sync()
  btrfs: make concurrent fsyncs wait less when waiting for a transaction commit

 fs/btrfs/file.c        |   1 +
 fs/btrfs/transaction.c |  39 +++++++--
 fs/btrfs/transaction.h |   2 +
 fs/btrfs/tree-log.c    | 195 ++++++++++++-----------------------------
 4 files changed, 92 insertions(+), 145 deletions(-)

-- 
2.28.0