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From: Pavel Begunkov <[email protected]>
To: [email protected]
Cc: Jens Axboe <[email protected]>,
	[email protected], [email protected]
Subject: [PATCH v2 00/13] optimise registered buffer/file updates
Date: Tue,  4 Apr 2023 13:39:44 +0100	[thread overview]
Message-ID: <[email protected]> (raw)

The patchset optimises registered files and buffers updates / removals,
The rsrc-update-bench test showes 11x improvement (1040K -> 11468K
updates / sec). It also improves latency by eliminating rcu grace
period waiting and bouncing it to another worker, and reduces
memory footprint by removing percpu refs.

That's quite important for apps updating files/buffers with medium or
higher frequency as updates are slow and expensive, and it currently
takes quite a number of IO requests per update to make using fixed
files/buffers worthwhile.

Another upside is that it makes it simpler, patch 9 removes very
convoluted synchronisation via flush_delayed_work() from the quiesce
path.

v2: rebase, add patches 12 and 13 to remove the last pair atomics out
    of the path and to limit caching.

Pavel Begunkov (13):
  io_uring/rsrc: use non-pcpu refcounts for nodes
  io_uring/rsrc: keep cached refs per node
  io_uring: don't put nodes under spinlocks
  io_uring: io_free_req() via tw
  io_uring/rsrc: protect node refs with uring_lock
  io_uring/rsrc: kill rsrc_ref_lock
  io_uring/rsrc: rename rsrc_list
  io_uring/rsrc: optimise io_rsrc_put allocation
  io_uring/rsrc: don't offload node free
  io_uring/rsrc: cache struct io_rsrc_node
  io_uring/rsrc: add lockdep sanity checks
  io_uring/rsrc: optimise io_rsrc_data refcounting
  io_uring/rsrc: add custom limit for node caching

 include/linux/io_uring_types.h |   8 +-
 io_uring/alloc_cache.h         |   6 +-
 io_uring/io_uring.c            |  54 ++++++----
 io_uring/rsrc.c                | 176 ++++++++++++---------------------
 io_uring/rsrc.h                |  58 +++++------
 5 files changed, 136 insertions(+), 166 deletions(-)

-- 
2.39.1


             reply	other threads:[~2023-04-04 12:40 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-04-04 12:39 Pavel Begunkov [this message]
2023-04-04 12:39 ` [PATCH v2 01/13] io_uring/rsrc: use non-pcpu refcounts for nodes Pavel Begunkov
2023-04-04 12:39 ` [PATCH v2 02/13] io_uring/rsrc: keep cached refs per node Pavel Begunkov
2023-04-04 12:39 ` [PATCH v2 03/13] io_uring: don't put nodes under spinlocks Pavel Begunkov
2023-04-04 12:39 ` [PATCH v2 04/13] io_uring: io_free_req() via tw Pavel Begunkov
2023-04-04 12:39 ` [PATCH v2 05/13] io_uring/rsrc: protect node refs with uring_lock Pavel Begunkov
2023-04-04 12:39 ` [PATCH v2 06/13] io_uring/rsrc: kill rsrc_ref_lock Pavel Begunkov
2023-04-04 12:39 ` [PATCH v2 07/13] io_uring/rsrc: rename rsrc_list Pavel Begunkov
2023-04-04 12:39 ` [PATCH v2 08/13] io_uring/rsrc: optimise io_rsrc_put allocation Pavel Begunkov
2023-04-04 12:39 ` [PATCH v2 09/13] io_uring/rsrc: don't offload node free Pavel Begunkov
2023-04-04 12:39 ` [PATCH v2 10/13] io_uring/rsrc: cache struct io_rsrc_node Pavel Begunkov
2023-04-04 12:39 ` [PATCH v2 11/13] io_uring/rsrc: add lockdep sanity checks Pavel Begunkov
2023-04-04 12:39 ` [PATCH v2 12/13] io_uring/rsrc: optimise io_rsrc_data refcounting Pavel Begunkov
2023-04-04 12:39 ` [PATCH v2 13/13] io_uring/rsrc: add custom limit for node caching Pavel Begunkov
2023-04-04 15:30 ` [PATCH v2 00/13] optimise registered buffer/file updates Jens Axboe
2023-04-04 15:33 ` Jens Axboe

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