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(parent: 326a9e4) | patch
io_uring: optimise non-timeout waiting
authorPavel Begunkov <asml.silence@gmail.com>
Thu, 5 Jan 2023 11:22:28 +0000 (11:22 +0000)
committerJens Axboe <axboe@kernel.dk>
Sun, 29 Jan 2023 22:17:40 +0000 (15:17 -0700)
commit46ae7eef44f6dfd825a3bcfa43392d3ad9836ada
tree8861a0baf334affd023c35b160f33d4ccbe66ba2tree | snapshot
parent326a9e482e2134d7a44b7f8f9a721b38c6bbb146commit | diff
io_uring: optimise non-timeout waiting

Unlike the jiffy scheduling version, schedule_hrtimeout() jumps a few
functions before getting into schedule() even if there is no actual
timeout needed. Some tests showed that it takes up to 1% of CPU cycles.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/89f880574eceee6f4899783377ead234df7b3d04.1672916894.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
io_uring/io_uring.c diff | blob | blame | history
Linux 6.x block layer and io_uring tree(s)