linux-kernel - Re: [PATCH v9 1/1] io_uring: releasing CPU resources when polling

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Message-ID: <a9b7a578-cf47-474f-8714-297437b385cd@kernel.dk>
Date: Fri, 1 Nov 2024 08:06:47 -0600
From: Jens Axboe <axboe@...nel.dk>
To: hexue <xue01.he@...sung.com>, asml.silence@...il.com
Cc: io-uring@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v9 1/1] io_uring: releasing CPU resources when polling

On 11/1/24 3:19 AM, hexue wrote:
> A new hybrid poll is implemented on the io_uring layer. Once IO issued,
> it will not polling immediately, but block first and re-run before IO
> complete, then poll to reap IO. This poll function could be a suboptimal
> solution when running on a single thread, it offers the performance lower
> than regular polling but higher than IRQ, and CPU utilization is also lower
> than polling.

This looks much better now.

Do you have a patch for liburing to enable testing of hybrid polling
as well? Don't care about perf numbers for that, but it should get
exercised.

-- 
Jens Axboe