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From: Hao Xu <[email protected]>
To: Jens Axboe <[email protected]>
Cc: [email protected], Pavel Begunkov <[email protected]>,
	Joseph Qi <[email protected]>
Subject: [PATCH RFC 5.13 0/2] adaptive sqpoll and its wakeup optimization
Date: Wed, 28 Apr 2021 21:32:26 +0800	[thread overview]
Message-ID: <[email protected]> (raw)

patch 1/2 provides a new option to set up sq_thread_idle in nanosecond
granularity.
patch 2/2 is to cut down IO latency when sqthread is waking up.

This is a RFC, especially 2/2. There may be more works to do, like add
a REGISTER OP to allow applications to adjust sq_thread_idle, since it
may experience both high IO pressure and low IO pressure. And in low IO
pressure, patch 1/2 saves cpu resource while keeping a reasonable
latency. liburing tweak is ready as well, but currently I'd like to just
post this for comments.

Hao Xu (2):
  io_uring: add support for ns granularity of io_sq_thread_idle
  io_uring: submit sqes in the original context when waking up sqthread

 fs/io_uring.c                 | 88 ++++++++++++++++++++++++++++++++-----------
 include/uapi/linux/io_uring.h |  4 +-
 2 files changed, 70 insertions(+), 22 deletions(-)

-- 
1.8.3.1


             reply	other threads:[~2021-04-28 13:32 UTC|newest]

Thread overview: 40+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-28 13:32 Hao Xu [this message]
2021-04-28 13:32 ` [PATCH RFC 5.13 1/2] io_uring: add support for ns granularity of io_sq_thread_idle Hao Xu
2021-04-28 14:07   ` Pavel Begunkov
2021-04-28 14:16     ` Jens Axboe
2021-04-28 14:53       ` Pavel Begunkov
2021-04-28 14:54         ` Jens Axboe
2021-04-29  3:41       ` Hao Xu
2021-04-29  9:11         ` Pavel Begunkov
2021-05-05 14:07           ` Hao Xu
2021-05-05 17:40             ` Pavel Begunkov
2021-04-29  3:28     ` Hao Xu
2021-04-29 22:15       ` Pavel Begunkov
2021-09-26 10:00         ` Hao Xu
2021-09-28 10:51           ` Pavel Begunkov
2021-09-29  7:52             ` Hao Xu
2021-09-29  9:24             ` Hao Xu
2021-09-29 11:37               ` Pavel Begunkov
2021-09-29 12:13                 ` Hao Xu
2021-09-30  8:51                   ` Pavel Begunkov
2021-09-30 12:04                     ` Pavel Begunkov
2021-10-05 15:00                       ` Hao Xu
2021-04-28 13:32 ` [PATCH RFC 5.13 2/2] io_uring: submit sqes in the original context when waking up sqthread Hao Xu
2021-04-28 14:12   ` Jens Axboe
2021-04-29  4:12     ` Hao Xu
2021-04-28 14:34   ` Pavel Begunkov
2021-04-28 14:37     ` Pavel Begunkov
2021-04-29  4:37       ` Hao Xu
2021-04-29  9:28         ` Pavel Begunkov
2021-05-05 11:20           ` Hao Xu
2021-04-28 14:39     ` Jens Axboe
2021-04-28 14:50       ` Pavel Begunkov
2021-04-28 14:53         ` Jens Axboe
2021-04-28 14:56           ` Pavel Begunkov
2021-04-28 15:09             ` Jens Axboe
2021-04-29  4:43       ` Hao Xu
2021-04-29  8:44     ` Hao Xu
2021-04-29 22:10       ` Pavel Begunkov
2021-05-05 13:10         ` Hao Xu
2021-05-05 17:44           ` Pavel Begunkov
2021-04-29 22:02   ` Pavel Begunkov

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