io_uring: optimise non-timeout waiting

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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>

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Pavel Begunkov 2023-01-05 11:22:28 +00:00 • committed by Jens Axboe

parent 326a9e482e

commit 46ae7eef44

1 changed files with 3 additions and 1 deletions

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io_uring/io_uring.c

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